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1
Krayenbuehl, Thomas, Nadeem Balushi, and Stephane Gesbert. "Novel geometric classification of 3D seismic and its application to the Habshan clinoforms of Western Oman." Leading Edge 40, no. 3 (March 2021): 186–92. http://dx.doi.org/10.1190/tle40030186.1.
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The principles and benefits of seismic sequence stratigraphy have withstood the test of time, but the application of seismic sequence stratigraphy is still carried out mostly manually. Several tool kits have been developed to semiautomatically extract dense stacks of horizons from seismic data, but they stop short of exploiting the full potential of seismo-stratigraphic models. We introduce novel geometric seismic attributes that associate relative geologic age models with seismic geomorphological models. We propose that a relative sea level curve can be derived from the models. The approach is demonstrated on a case study from the Lower Cretaceous Kahmah Group in the northwestern part of Oman where it helps in sweet-spotting and derisking elusive stratigraphic traps.
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Hart, Bruce S. "Whither seismic stratigraphy?" Interpretation 1, no. 1 (August 1, 2013): SA3—SA20. http://dx.doi.org/10.1190/int-2013-0049.1.
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Here, I provide an historical summary of seismic stratigraphy and suggest some potential avenues for future collaborative work between sedimentary geologists and geophysicists. Stratigraphic interpretations based on reflection geometry- or shape-based approaches have been used to reconstruct depositional histories and to make qualitative and (sometimes) quantitative predictions of rock physical properties since at least the mid-1970s. This is the seismic stratigraphy that is usually practiced by geology-focused interpreters. First applied to 2D seismic data, interest in seismic stratigraphy was reinvigorated by the development of seismic geomorphology on 3D volumes. This type of reflection geometry/shape-based interpretation strategy is a fairly mature science that includes seismic sequence analysis, seismic facies analysis, reflection character analysis, and seismic geomorphology. Rock property predictions based on seismic stratigraphic interpretations usually are qualitative, and reflection geometries commonly may permit more than one interpretation. Two geophysics-based approaches, practiced for nearly the same length of time as seismic stratigraphy, have yet to gain widespread adoption by geologic interpreters even though they have much potential application. The first is the use of seismic attributes for “feature detection,” i.e., helping interpreters to identify stratigraphic bodies that are not readily detected in conventional amplitude displays. The second involves rock property (lithology, porosity, etc.) predictions from various inversion methods or seismic attribute analyses. Stratigraphers can help quality check the results and learn about relationships between depositional features and lithologic properties of interest. Stratigraphers also can contribute to a better seismic analysis by helping to define the effects of “stratigraphy” (e.g., laminations, porosity, bedding) on rock properties and seismic responses. These and other seismic-related pursuits would benefit from enhanced collaboration between sedimentary geologists and geophysicists.
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Butler, Rob. "Tectonics and seismic sequence stratigraphy." Journal of Structural Geology 16, no. 1 (January 1994): 144–45. http://dx.doi.org/10.1016/0191-8141(94)90026-4.
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WILLIAMS, GRAHAM D., and ANGELA DOBB. "Tectonics and seismic sequence stratigraphy." Journal of the Geological Society 148, no. 5 (September 1991): 935–37. http://dx.doi.org/10.1144/gsjgs.148.5.0935.
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Ben-Avraham, Z. "Tectonics and seismic sequence stratigraphy." Tectonophysics 230, no. 1-2 (February 1994): 141. http://dx.doi.org/10.1016/0040-1951(94)90153-8.
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Roberts, D. G. "Tectonics and seismic sequence stratigraphy." Marine and Petroleum Geology 10, no. 6 (December 1993): 635. http://dx.doi.org/10.1016/0264-8172(93)90070-9.
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Woodside, John. "Tectonics and seismic sequence stratigraphy." Sedimentary Geology 90, no. 3-4 (May 1994): 308–9. http://dx.doi.org/10.1016/0037-0738(94)90046-9.
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Polcz, I. "Tectonics and seismic sequence stratigraphy." Earth-Science Reviews 36, no. 1-2 (April 1994): 143–44. http://dx.doi.org/10.1016/0012-8252(94)90019-1.
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Scott, R. W. "Are seismic/depositional sequences chronostratigraphic units?" Paleontological Society Special Publications 6 (1992): 264. http://dx.doi.org/10.1017/s2475262200008248.
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Sequence Stratigraphic Analysis is claimed to be a “new globally valid system of stratigraphy … a precise methodology to subdivide, correlate and map sedimentary rocks” (Vail et al., 1991, p. 622). Sequence stratigraphic units, such as depositional sequences, depositional systems tracts, and parasequences, are time-equivalent rocks of specific durations controlled by cyclical changes in sediment supply related to eustasy. These units are bounded by regionally extensive unconformities with erosion beneath and onlapping strata above, or by physical surfaces separating either different patterns of stratal geometry or shoaling-up facies units. According to this school, precise correlations are based upon inferred time relations within depositional models.Several key concepts of sequence stratigraphy have their origins in early geological studies. For many years geologists have separated time-equivalent strata by regional unconformities related to changes in climate or sea level, e.g., J. Woodward, 1695 and T. C. Chamberline, 1909. Stratal surfaces, such as bentonites and limestone markers, have been used in place of fossils for time correlations since the first wells were drilled. Stratigraphic models have strongly influenced how we correlate strata since the time of William Smith.Two developments are, indeed, new and have sparked the current resurgence in stratigraphic research. One is the seismic technology to test the physical continuity of strata on a regional scale (50-100 km), and to test the stratal geometry of genetically related depositional packages. The second is the chart of global coastal onlap events and eustasy (Haq et al., 1988).Some key research problems are: (1) how to identify unique, time-significant stratal surfaces; (2) how to test their physical continuity; (3) how to test the time relations within depositional models; and (4) how to identify the unique, time-significant global events recorded in the stratigraphic record. These stratigraphic concepts can be tested by graphic correlation, which is a powerful technique of high precision, quantitative stratigraphy. Its application in Cretaceous sections of the Gulf Coast and Oman, and in the Plio-Pliestocene of the Gulf Coast aids the distinction between synchronous surfaces and diachronous boundaries.
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Al-Masgari, Abd Al-Salam, Mohamed Elsaadany, Numair A. Siddiqui, Abdul Halim Abdul Latiff, Azli Abu Bakar, Sami Elkurdy, Maman Hermana, Ismailalwali Babikir, Qazi Sohail Imran, and Teslim Adeleke. "Geomorphological Geometries and High-Resolution Seismic Sequence Stratigraphy of Malay Basin’s Fluvial Succession." Applied Sciences 11, no. 11 (June 2, 2021): 5156. http://dx.doi.org/10.3390/app11115156.
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This study identified the Pleistocene depositional succession of the group (A) (marine, estuarine, and fluvial depositional systems) of the Melor and Inas fields in the central Malay Basin from the seafloor to approximately −507 ms (522 m). During the last few years, hydrocarbon exploration in Malay Basin has moved to focus on stratigraphic traps, specifically those that existed with channel sands. These traps motivate carrying out this research to image and locate these kinds of traps. It can be difficult to determine if closely spaced-out channels and channel belts exist within several seismic sequences in map-view with proper seismic sequence geomorphic elements and stratigraphic surfaces seismic cross lines, or probably reinforce the auto-cyclic aggregational stacking of the avulsing rivers precisely. This analysis overcomes this challenge by combining well-log with three-dimensional (3D) seismic data to resolve the deposition stratigraphic discontinuities’ considerable resolution. Three-dimensional (3D) seismic volume and high-resolution two-dimensional (2D) seismic sections with several wells were utilized. A high-resolution seismic sequence stratigraphy framework of three main seismic sequences (3rd order), four Parasequences sets (4th order), and seven Parasequences (5th order) have been established. The time slice images at consecutive two-way times display single meandering channels ranging in width from 170 to 900 m. Moreover, other geomorphological elements have been perfectly imaged, elements such as interfluves, incised valleys, chute cutoff, point bars, and extinction surfaces, providing proof of rapid growth and transformation of deposits. The high-resolution 2D sections with Cosine of Phase seismic attributes have facilitated identifying the reflection terminations against the stratigraphic amplitude. Several continuous and discontinuous channels, fluvial point bars, and marine sediments through the sequence stratigraphic framework have been addressed. The whole series reveals that almost all fluvial systems lay in the valleys at each depositional sequence’s bottom bars. The degradational stacking patterns are characterized by the fluvial channels with no evidence of fluvial aggradation. Moreover, the aggradation stage is restricted to marine sedimentation incursions. The 3D description of these deposits permits distinguishing seismic facies of the abandoned mud channel and the sand point bar deposits. The continuous meandering channel, which is filled by muddy deposits, may function as horizontal muddy barriers or baffles that might isolate the reservoir body into separate storage containers. The 3rd, 4th, and 5th orders of the seismic sequences were established for the studied succession. The essential geomorphological elements have been imaged utilizing several seismic attributes.
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Wharton, Stanley Rich. "The Rimthan Arch, basin architecture, and stratigraphic trap potential in Saudi Arabia." Interpretation 5, no. 4 (November 30, 2017): T563—T578. http://dx.doi.org/10.1190/int-2017-0033.1.
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The Rimthan Arch, situated between the Arabian carbonate platform and the Gotnia intrashelf basin, represents a world class hydrocarbon province in Saudi Arabia. Middle to Upper Jurassic shallow-water depositional sequences are associated with productive hydrocarbon fields in which challenges exist in defining exploration targets, mainly stratigraphic trap plays. An attempt is made to investigate the basin depositional architecture on the flank of the Arch and also to model the stratigraphic trap potential of the youngest Arab third-order sequence. The basin architecture, stratal geometries, and impact of tectonics are explored using 3D seismic and well data. Seismic chronostratigraphy, seismic stratigraphy, seismic attribute, and log-based reservoir heterogeneity techniques are applied as an integrated approach to interpret the sequences from basin to reservoir scale. The study identifies two second-order sequences, SEQ 1 and SEQ 2, to frame a 3D geologic model and to examine basin development through time. Results derived from the integrated study indicate that although initial basin subsidence began later in SEQ 1 north of the Arch, it increased appreciably during SEQ 2. The Dhruma J20 maximum flooding surface, Lower Fadhili, and Hanifa provide clues in tracking major basin changes. Seismic stratigraphy applications highlight reflection terminations and prograding stratal geometries throughout the stratigraphic section to demonstrate tectonoeustatic influences. Tectonics impact SEQ 2 more intensely than SEQ 1 and may influence the migration of hydrocarbons across juxtaposed lithologies. A complex association between shallow marine tidal and ramp carbonates, and deeper basin halite beds, is linked to the subsiding Gotnia Basin. Log-facies analysis of the Arab third-order sequence demonstrates reservoir and seal trends, including the stratigraphic entrapment potential along a carbonate ramp profile. Seismic attributes support reservoir-depositional trends and salt-bed geometries. The integrated approach provides a targeted workflow to investigate the complex depositional systems and their stratigraphic trapping potential on the Arch.
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Guan, Xiaowei, Qian Meng, Chuanjin Jiang, Xinyu Liu, and Menglu Han. "Research and Application of Globally Optimized Sequence Stratigraphic Seismic Interpretation Technology: Taking the Lower Cretaceous Shahezi Formation of Xujiaweizi Fault Depression as an Example." Geofluids 2021 (September 15, 2021): 1–9. http://dx.doi.org/10.1155/2021/7564374.
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In the study of sequence stratigraphy in continental rift basins, the use of seismic data to track different levels of sequence stratigraphic boundaries laterally is the key to the division of sequence stratigraphic units at all levels and the establishment of an isochronous sequence stratigraphic framework. Traditional seismic interpretation and the establishment of a 3D sequence stratigraphic structure model are a difficult research work. This paper introduces the concept of cost function minimization and performs global stratigraphic scanning on 3D seismic data to interpret horizons and faults in a large grid. Constrained by the results, human-computer interactive intelligent interpretation, by adding iterative interpretation of geological knowledge, established a global stratigraphic model with a relative geological age. The application in the Lower Cretaceous Shahezi Formation of Xujiaweizi fault depression shows that this technology has improved the accuracy and efficiency of sequence stratigraphic interpretation, and the application of this technology has achieved the interpretation of each event horizon under the current seismic data resolution conditions. In this way, a continuous sequence stratigraphic model is established. From this stratigraphic model, any high-frequency sequence-interpreted seismic horizon can be extracted, which provides a basis for the combination of lateral resolution and longitudinal resolution of subsequent reservoir prediction.
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Yu, Bao, and Ling Yu Xu. "Sequence Stratigraphic Characteristics of Damoguaihe Formation in the North of Wuerxun Sag." Applied Mechanics and Materials 733 (February 2015): 84–87. http://dx.doi.org/10.4028/www.scientific.net/amm.733.84.
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Using the theories and methods of high-resolution sequence stratigraphy in rift lacustrine basins, we analyzed seismic, logging and drilling core data of the Damoguaihe Formation in the northern Wuerxun Sag area of the Hailaer Basin in order to understand its sequence stratigraphy characters. We identified third-order sequence boundaries and maximum flooding surfaces and established the sequence stratigraphic framework of the Damoguaihe Formation, which is a set of type sequence. It includes lowstand system tracts (LST), transgressive system tracts (TST) and highstand system tracts (HST).
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Li, Jing Zhe, Jing Liang Zhang, Yong Yuan, Peng Hui Zhang, Cun Lei Li, Zhong Qin Luo, Lei Qin, Fang Ding, Xue Li, and Yan Li. "Sequence Stratigraphy of Jurassic Succession in Central Junggar Basin, China." Advanced Materials Research 734-737 (August 2013): 440–43. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.440.
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Sequence stratigraphic features of the Jurassic succession in Central Junggar Basin were investigated by integrating multiple materials including cores, well and seismic data. Due to their unique formation mechanism, sequences of the target interval were analyzed with a binary systems tract mode (each complete sequence contains a transgressive systems tract and a highstand systems tract) rather than the traditional one. Basic principles and analytical methods of high-resolution sequence stratigraphy were also applied to this research. By adopting cyclic correlation and hierarchical control techniques, eight sequences (Sq1-Sq8) were identified in the target interval. Especially, coal seams are of great significance in the sequence identification and they were considered to be closely relevant to maximum flooding surfaces (mfs).
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Duan, Ru Tai, Zhen Kui Jin, and Chong Hui Suo. "Seismic Stratigraphy and Seismic Geomorphology: Insights on Characterization of a Carbonate Reservoir." Applied Mechanics and Materials 138-139 (November 2011): 447–52. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.447.
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Seismic stratigraphy and seismic geomorphology provides an indication of a carbonate platform’s internal and external architecture. High quality 3D seismic data integrated with wireline logs and core materials furthers detailed depositional element analysis, lithology prediction and diagenetic modification of the stratigraphic section, which help to build a depositional model, sequence stratigraphy framework and enhance the evaluation of the reservoir potential of this unit and a prediction of fluid flow during hydrocarbon production. This study mainly focus on using 3D seismic data calibrated with core and logs from oil field A to characterize the stratigraphy and geomorphology of the depositional elements of the carbonate reservoir (Aptaian Stage) and infer the process of the deposition where appropriate. Integration of seismic data with well data provides the frame work for reconstruction depositional evolution history the reservoir. The high seismic resolution of the A reservoirs also provides useful analogs for other subsurface reservoirs from similar depositional environments.
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Yuan, Hong Qi, Ying Hua Yu, and Dong Li Sun. "Sequence Boundaries Identification of Putaohua Oil Layer in Qijia-Gulong Area." Advanced Materials Research 734-737 (August 2013): 166–69. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.166.
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Sequence is a relatively conformable succession of genetically related strata bounded by unconformities or their correlative conformities. The correct identification of sequence boundaries is the key to the success of the sequence stratigraphic approach. Stratigraphic boundaries provide the fundamental framework for the genetic interpretation of any sedimentary succession, irrespective of how one may choose to name the packages of strata between them. Sequence stratigraphy of main research content is mainly chronohorizon (unconformity or conformity) identification, and to determine its causes and characteristics. Then, the key to sequence stratigraphy is identification unconformity and their correlative conformities. Unconformity and their correlative conformities on the seismic profiles, well logs, lithology, paleontology, and geochemical data have distinctive sequence boundaries mark characteristics.
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Williams, G. D. "Tectonics and seismic sequence stratigraphy: an introduction." Geological Society, London, Special Publications 71, no. 1 (1993): 1–13. http://dx.doi.org/10.1144/gsl.sp.1993.071.01.01.
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Light, M. P. R., M. P. Maslanyj, R. J. Greenwood, and N. L. Banks. "Seismic sequence stratigraphy and tectonics offshore Namibia." Geological Society, London, Special Publications 71, no. 1 (1993): 163–91. http://dx.doi.org/10.1144/gsl.sp.1993.071.01.08.
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Yang, Wei, and Ming Yi Hu. "Porosity Inversion under the Sequence Stratigraphy Framework." Advanced Materials Research 989-994 (July 2014): 1424–27. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.1424.
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Carbonate reef reservoir buried deeply, show great heterogeneity, Therefore, effective reservoir prediction is the key to the biohermal reservoir. In practical research, based on of the single well sequence stratigraphic framework, combined with these sequence stratigraphic framework and seismic section, found the reservoir development area in the longitudinal, which sq1-HST and sq3-HST is the main period of reservoir development, and then through the seismic Seismic multiple-attribute inversion, predicted porosity of system tracts of reservoir development in the sequence stratigraphic framework. Porosity inversion results shown, Changxing formation reservoir is mainly distributed in the central and north-central of Jiannan area.
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Shaffer, Bernard L., Jory A. Pacht, and Bruce E. Bowen. "Aspects of Gulf Coast late Neogene sequence stratigraphy." Paleontological Society Special Publications 6 (1992): 268. http://dx.doi.org/10.1017/s2475262200008285.
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With its vast well and seismic data base, coupled with expanded sedimentary and biostratigraphic cycles that apparently were driven by glacial eustacy, the Gulf Coast offshore region provides a unique opportunity to develop and test sequence models. Virtually every major oil company and a number of academic institutions are currently engaged in some form of sequence analysis.Regional studies incorporating biostratigraphic analyses of more than 120 wells integrated with a seismic grid exceeding 24,000 line smiles, have shown the Gulf Coast to be an unstable prograding margin, and that characteristic seismic criteria developed for stable progradational margin models do not always apply. Biostratigraphic approaches consistent with the procedures and objectives of sequence analysis thus play a preeminent role in providing a chronostratigraphic framework, and in utilizing biotic patterns to aid in the delineation of systems tracts.For the pre- Wisconsin Plio-Pleistocene, 15 biostratigraphically and seismically resolvable and regionally mappable sequences are documented. Those for the past one million years approximate 100,000 year cycles. All of the sequences are calibrated by highest occurrence datums (HOD) which almost invariably occur within condensed sections developed either during maximum flooding events or on lowstand slope fans. This association with condensed sections begs the question whether or not these HOD are true extinctions, and whether or not sediment accumulation rates, or similar techniques, derived from them, can reliably be used to establish the position and absolute age of sequence bounding unconformities.Seismic and well data suggest that sequence bounding surfaces in this province are usually subtle, and that the hiatus they may represent is, except in extreme cases, beyond the resolution of the biostratigraphic framework. Sequence boundary placement can be routinely interpreted through integration of bioistratigraphic data, including condensed sections, wireline log patterns, and seismic character. In slope paleo-environments, condensed sections commonly are temporally equivalent to both the trasgressive and highstand systems tracts on the shelf, and their upper surface may coincide with the sequence boundary. In paleo-shelf settings, condensed sections frequently are restricted to the transgressive systems tract, and their contained HOD may be suppressed by succeeding highstand deposits. In such cases, sequence boundaries are best placed by wireline log and seismic criteria.Pitfalls and limitations to the proposed biostratigraphic approach to sequence stratigraphy are discussed and illustrated.
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Zhang, Lei, Lun Wei Zhu, and Xue Juan Zhang. "High Resolution Sequence Stratigraphy of Silurian Strata in Tazhong Area." Advanced Materials Research 734-737 (August 2013): 111–16. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.111.
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According to the fundamental principles of high resolution sequence stratigraphy, this paper focused on the application of high resolution sequence stratigraphy to Silurian strata in Tazhong area. Based on the comprehensive study of logging, drilling and seismic information, the high resolution sequence boundaries of Silurian strata and two scales of datum level cycles (long-term and intermediate-term) can be recognized in Tazhong area. Seven chronstratigraphic boundaries can be recognized in Silurian strata, including four sequence boundaries, which were the transformation from datum level falling to datum level rising, and three flooding surfaces, which the transformation from datum level rising to datum level falling. The Silurian strata in Tazhong area can be divided into three third-order sequences which correspond to three long-term datum level cycles, and 11 fourth-order sequences (parasequence sets) relating to 11 intermediate-term datum level cycles. The classification aforementioned can much better solved the corresponding problem between the six lithological sections of Silurian strata and sequence formations, finally establishes the high resolution sequence stratigraphic framework of Silurian strata in Tazhong area.
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Qayyum, Farrukh, Octavian Catuneanu, and Crépin Eric Bouanga. "Sequence stratigraphy of a mixed siliciclastic-carbonate setting, Scotian Shelf, Canada." Interpretation 3, no. 2 (May 1, 2015): SN21—SN37. http://dx.doi.org/10.1190/int-2014-0129.1.
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During the Jurassic Period, a large-scale carbonate bank (Abenaki Formation) and a siliciclastic (Sable) delta coexisted in North America. Conventionally, carbonate systems (in situ) are separated from siliciclastic systems (transported) because of their contrasting origin. However, we developed a case study to show that the basic principles of sequence stratigraphy remain applicable. We integrated the results obtained from a regional 2D study and a detailed follow-up study using 3D seismic data of the Scotian Shelf, Canada. The results were integrated with the prepared Wheeler diagrams, and a unified sequence stratigraphic framework was proposed. We determined that two second-order sequences were developed on a larger scale during the Jurassic Period. The first sequence developed during the transition from a ramp to rimmed margin. The second sequence developed during the evolution from a rimmed to ramp margin. These sequences formed a distinct stratigraphic style throughout the Scotian Shelf. The siliciclastic supply varied from the northeast to the southwest depending on the studied site; however, the regions close to the siliciclastic supply contained well-defined clinoform patterns. The topsets of such clinoforms were mostly eroded. Their directions were also found to be different than the carbonate-related clinoform geometries. Most of the carbonates were developed; as such, they kept up and prograded toward a backreef margin during the rimming stages. The second-order sequences were further subdivided into four third-order sequences. These were studied using the 3D seismic data and were found to contain several barrier reefs that could have stratigraphic exploration potential in the Penobscot area.
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Leslie-Panek, Jennifer, Margot McMechan, and Fil Ferri. "Northeast British Columbia Liard Basin: A seismic stratigraphy study." Interpretation 8, no. 3 (June 13, 2020): T579—T588. http://dx.doi.org/10.1190/int-2019-0187.1.
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The Liard Basin is a highly prospective shale gas basin located in northeast British Columbia that is largely underrepresented in public literature. We used available-for-purchase 2D seismic data in the area to create a high-level, regional stratigraphic interpretation of the basin, providing the first seismically controlled overview of the basin structure and stratigraphy. The basin is characterized by two distinct, opposing wedges of sediment in the Mesozoic and Paleozoic sections: the Mesozoic with northeastward thinning and the Paleozoic with southwestward thinning. The wedging of the Upper Devonian-Lower Mississippian (Tournasian) section is dominated by multiple large packages of clinoforms, which progress into the basin from northeast to southwest and are predominantly seen in the seismic sequence stratigraphy. These distinct packages of clinoforms indicate changing sediment sources over time. In contrast, there are no clinoforms seen in the Mesozoic section, which may be a limitation of the orientation of the 2D seismic data that we used. Our result from the seismic interpretation is an updated interpretation of the Upper Devonian-Lower Mississippian stratigraphy of the Liard Basin, including an updated stratigraphic cross section for the area.
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Konradi, P. "Cenozoic stratigraphy in the Danish North Sea Basin." Netherlands Journal of Geosciences 84, no. 2 (July 2005): 109–11. http://dx.doi.org/10.1017/s001677460002299x.
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AbstractThis paper provides a concise review of investigations into the Cenozoic stratigraphy of the Danish North Sea Basin. In the Danish North Sea, mainly Pliocene and Pleistocene strata are found. Results of published seismic and sequence stratigraphic analyses are combined with biostratigraphic analyses and correlated to marine formations found onshore.
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Natasia, Nanda, Ildrem Syafri, Muhammad Kurniawan Alfadli, and Kurnia Arfiansyah. "Stratigraphy Seismic and sedimentation Development of Middle Baong Sand, Aru Field, North Sumatera Basin." Journal of Geoscience, Engineering, Environment, and Technology 1, no. 1 (December 1, 2016): 51. http://dx.doi.org/10.24273/jgeet.2016.11.7.
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This paper defines the stratigraphic sequence focused on Middle Baong Sand. The analyses aim to understand the sedimentation pattern regarding to sequence stratigraphy model including its lateral and vertical succession based on seismic and well data. The study can be used in ranking the prospect for new oil field. Based on the analyses in 39 seismic sections and 2 wireline log, the area are consist of three depositional sequences, namely sequence I (consist of HST I) Sequence II (consist of TST II and LST II), and Sequence III (consist of TST III). Baong Formation are deposited when the sea level are rising regionally at Middle Miocene (N7-N15) makes the sediment deposited in deep water environment. while Middle Baong Sand are deposited in the minor falling stage placed at N13 (Middle of Middle Miocene). In this episode, there is a change in depositional setting from bathyal to middle neritic. Clastic origin of this deposits were interpreted came from South-South West direction or from Bukit Barisan where at that time is started to uplift.
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Parvin, Afroza, and ASM Woobaidullah. "Incorporation of Sequence Stratigraphy in Gas Reservoir Correlation: A Case Study." Journal of the Asiatic Society of Bangladesh, Science 45, no. 2 (December 28, 2019): 209–16. http://dx.doi.org/10.3329/jasbs.v45i2.46594.
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The application of sequence stratigraphy to resolve the miscorrelation between different genetic units in reservoir characterization in a gas field of Surma Basin is dealt with. Interpretation of available seismic and wireline logs (gamma ray, resistivity, density and neutron porosity) give the sequence stratigraphic correlation of reservoir sands. The reservoirs geometry, its extent, seal architecture and trapping styles have been revealed better with this correlation. There is juxtaposition of two reservoir sands, namely A1 and A2. A1 is located at older highstand sand, whereas A2 is in the younger lowstand sand. Lithostratigraphically they might be same but sequences stratigraphy reveals that they are different and deposited at different times. Moreover, the concept reveals that lowstand sand has better reservoir quality than any highstand and transgressive sand.
Asiat. Soc. Bangladesh, Sci. 45(2): 209-216, December 2019
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Zhou, Guangzhao, Zhiming Hu, Xianggang Duan, and Jin Chang. "Identification of sequence stratigraphy in the Dongying Formation of the Liaoxi low uplift, Bohai Bay Basin, China." Canadian Journal of Earth Sciences 57, no. 5 (May 2020): 647–61. http://dx.doi.org/10.1139/cjes-2018-0276.
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A change in sea level (or lake level) causes a change in accommodation space and sediment compensation, which then controls the formation and evolution of sequences. A multidisciplinary approach based on the integration of clay minerals, major and trace elements, paleosalinity, and three-dimensional seismic data were applied to interpret the stratigraphic sequence of the Dongying Formation in the Liaoxi low uplift. The sequence surface indicates that multistage tectonic action, paleoclimate, paleosalinity, and lake level change jointly controlled the sequence stratigraphy. The illite and illite–smectite mixed layers indicate an arid to semi-arid climate, whereas kaolinite implies humid conditions. Based on this principle, it is clear that the stratigraphic sequence is closely related to paleoclimate. Interpretation of the continental or marine character of the sediments via paleosalinity is increasingly based on the concentration of some trace elements. Hence, the sequence surface can be better evaluated through paleosalinity data. Based on the Sr/Ba and boron content, paleosalinity was evaluated and the sequence boundary was identified. Analysis of the concentration of major and trace elements was used to identify the lithology of the sedimentary region and further discern the stratigraphic sequence. These sequences are composed of lowstand, transgressive, and highstand system tracts. The work herein aimed to understand the reasons for the changes in sequences under the paleoclimate. In addition, major and trace elements, studied together with paleosalinity and clay mineral content, result in the determination of implications for sequence stratigraphy in many other basins. This paper can provide a novel method for comprehensively discerning a sequence surface.
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Weimer, Paul, and Roger M. Slatt. "Turbidite systems, Part 1: Sequence and seismic stratigraphy." Leading Edge 18, no. 4 (April 1999): 454–63. http://dx.doi.org/10.1190/1.1438309.
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Al-Masgari, Abd Al-Salam, Mohamed Elsaadany, Abdul Halim Abdul Latiff, Maman Hermana, Umar Bin Hamzah, IsmailAlwali Babikir, Teslim Adeleke, Qazi Sohail Imran, and Mohammed Ali Mohammed Al-Bared. "Seismic Sequence Stratigraphic Sub-Division Using Well Logs and Seismic Data of Taranaki Basin, New Zealand." Applied Sciences 11, no. 3 (January 29, 2021): 1226. http://dx.doi.org/10.3390/app11031226.
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This study focuses on the sequence stratigraphy and the dominated seismic facies in the Central Taranaki basin. Four regional seismic sequences namely SEQ4 to SEQ1 from bottom to top and four boundaries representing unconformities namely H4 to H1 from bottom to top have been traced based on the reflection terminations. This was validated using well logs information. An onlapping feature on the seismic section indicates a new perspective surface separated between the upper and lower Giant formation, which indicates a period of seawater encroachment. This study focused extensively on deposition units from SEQ4 to SEQ1. The seismic facies, isochron map, and depositional environment were determined, and the system tract was established. This study was also able to propose a new perspective sequence stratigraphy framework of the basin and probable hydrocarbon accumulations and from the general geological aspect, SA-Middle Giant Formation (SEQ3) could act as potential traps.
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Seggie, R. J., S. C. Lang, N. M. Marshall, C. J. Cubitt, D. Alsop, R. Kirk, and S. Twartz. "INTEGRATED MULTI-DISCIPLINARY ANALYSIS OF THE RANKIN TREND GAS RESERVOIRS NORTH WEST SHELF, AUSTRALIA." APPEA Journal 47, no. 1 (2007): 55. http://dx.doi.org/10.1071/aj06003.
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An integrated geological study of the Rankin Trend of the North West Shelf, Australia, was undertaken to underpin the ongoing development of the giant gas fields it contains. The study applied an improved understanding ofthe regional stratigraphy in conjunction with interpretation of the regional-scale Demeter 3D seismic survey and focussed on existing fields, undeveloped discoveries, and exploration prospects. The study included a redescription of 1,500 m of core, a new facies-based petrological analysis, a revision of the well-based stratigraphy and palaeogeographic mapping, and a seismic stratigraphic analysis. Reservoir production and hydrodynamic data were also integrated. The stratigraphic framework was improved by implementing a broad range of depositional and facies analogues and a system-wide sequence stratigraphic approach to understanding lateral and vertical stacking patterns of the reservoir succession. Visualisation and modelling technologies were also employed to more adequately describe genetic reservoir packages.Specific outcomes include: improved correlation of reservoir sequences, application of appropriate subsurface depositional analogues to field descriptions, updated palaeogeographic maps and recognition of palaeosols as stratigraphic marker horizons—resulting in a more consistent regional interpretation framework. This forms the basis for seismic stratigraphic interpretation away from well control.The new regional geological model has enabled the linkage of exploration, development and production understanding across the North West Shelf assets as well as management of geological uncertainties.
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Reilly, Mark, Suzanne Hurter, Zsolt Hamerli, Claudio L. de Andrade Vieira Filho, Andrew LaCroix, and Sebastian Gonzalez. "An integrated approach to the Surat Basin stratigraphy." APPEA Journal 59, no. 2 (2019): 940. http://dx.doi.org/10.1071/aj18073.
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The stratigraphy of the Surat Basin, Queensland, has historically been sub-divided by formation and unit nomenclature with a few attempts by other authors to apply sequence stratigraphy to existing formation boundaries. At a local- to field-scale, lithostratigraphy may be able to represent stratigraphy well, but at regional-scale, lithostratigraphic units are likely to be diachronous. To date, this lithology-driven framework does not accurately reflect time relationships in the sub-surface. An entirely new integrated methodological approach, involving well tied seismic data and sequence stratigraphic well-to-well correlations compared with published zircon age dates, has been applied to hundreds of deep wells and shallower coal seam gas wells. This method sub-divides the Surat Basin stratigraphy into defendable 2nd order to 3rd order sequence stratigraphic cycles and has required the use of an alpha-numeric sequence stratigraphic nomenclature to adequately and systematically label potential time equivalent surfaces basin-wide. Correlation of wells is the first step in building models of aquifers and coal seam gas fields for numerical simulation of fluid flow, which is necessary for responsible resource management. Lithostratigraphic correlations will overestimate the extent and hydraulic connectedness of the strata of interest. The result may be fluid flow models that do not represent a realistic pressure footprint of the flow. The present sequence stratigraphic method more accurately reflects the disconnectedness of sub-surface coals and sandstones (aquifers) on a field-to-field scale, adjacent field-scale, and basin-wide scale. It forms the basis for improved and more representative modelling of the sub-surface.
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Yu, Ying Hua, Hong Qi Yuan, and Zi Xue Guo. "Sedimentary Characteristics in Zhalainuoer Group in Cano Depression Hailaer Basin." Advanced Materials Research 652-654 (January 2013): 2515–19. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.2515.
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Based on the theory of sequence stratigraphy, sequence stratigraphy framework of is established in this paper by comprehensively search of core, logging and 3-D seismic data. Zhalainuoer group in Cano Depression is divided into 5 3rd-order sequences: Sq1、Sq2、Sq3、Sq4、Sq5 from down to up. Based on the division and comparison of sequence formation, the sedimentary facies and the depositional system are proposed to study in the paper, and the main depositional systems are detailed explained. The distribution of these depositional systems is controlled by the sequence framework.
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Adeleye, Mutiu Adesina, Kazeem Oladayo Yekeen, and Sikiru Adetona Amidu. "Seismic stratigraphic analysis for hydrocarbon exploration in the Beta Field, Coastal Swamp Depobelt, Niger Delta." Geology, Geophysics and Environment 46, no. 4 (December 22, 2020): 259–71. http://dx.doi.org/10.7494/geol.2020.46.4.259.
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Hydrocarbon exploration analysis from a seismic stratigraphic approach was carried out within the Beta Field, Coastal Swamp Depobelt, Niger Delta, to identify system tracts and sequence boundaries that could be associated with potential hydrocarbon accumulation. 3D seismic volume and data from four wells were analyzed. Depositional sequences, system tracts, sequence boundaries, and candidate maximum flooding surfaces were picked from logs, while reflection patterns and terminations were interpreted from seismic sections. Log shapes from gamma rays in combination with seismic facies analysis were interpreted in order to delineate lithology, depositional environments and depositional sequences. Seismic attributes were extracted and were draped on gridded surfaces from the interpreted seismic horizons. These were integrated with structure maps to obtain structural and stratigraphic trends, and the possible presence of reservoir sand. Five depositional sequences and nine seismic facies were identified within the field. The depositional sequences were designated Sequences S1 to S5 based on the depth of the occurrences and stacking patterns. This study reveals a progression from fluvial depositional settings to the shelf. The main reservoirs identified are the sand units of the highstand and lowstand within three depositional sequences (S1, S4 and S5) although interbedded sands within the TST of S4 and S5 are also suspected of being potential reservoirs. The channel sand deposits within the study area are suspected to be hydrocarbon bearing as they occurred within the complex fault trapping system popular in the Niger Delta. The application of seismic stratigraphy, as shown in this study, serves to encourage exploration in the Niger Delta where it could be effectively employed for reducing risk in hydrocarbon exploration.
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Wade, J. A., G. L. Williams, and B. C. MacLean. "Mesozoic and Cenozoic stratigraphy, eastern Scotian Shelf: new interpretations." Canadian Journal of Earth Sciences 32, no. 9 (September 1, 1995): 1462–73. http://dx.doi.org/10.1139/e95-118.
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A 320 km long, deep seismic reflection line across the central part of the Scotian Basin provides new insight on the deep stratigraphy of the basin, confirms the existence of up to 18 km of Mesozoic and Cenozoic sedimentary strata, and provides additional control on the relationship of proximal and distal stratigraphic units within the basin. Detailed biostratigraphic and seismic correlation from three outer shelf–upper slope wells yields important new information on Late Cretaceous and Tertiary unconformities and identifies a number of third-order sequence boundaries. The dating of prominent unconformities and correlation with the oceanic seismic markers AC and AU results in the reidentification of these horizons in the Sohm Abyssal Plain.
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Latimer, Rebecca. "Introduction to this special section: Sequence stratigraphy utilizing seismic." Leading Edge 26, no. 7 (July 2007): 869. http://dx.doi.org/10.1190/1.2756865.
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Wang, Chao. "Qingshankou-Formation Gravity-Flow Sedimentation in Early Cretaceous Songliao Basin of Northeast China: Evidences from Seismic Attributions Identification and Drilling Cores." Advanced Materials Research 898 (February 2014): 424–27. http://dx.doi.org/10.4028/www.scientific.net/amr.898.424.
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In order to fine the description and prediction the sedimentary microfacies of Qingshankou-Formation high-frequency sequence stratigraphic framework and search for new sandbody reservoir in the northern Songliao Basin, based on 3D seismic operation area, the principles of seismic sedimentology and sequence stratigraphy in North Songliao Basin Qingshankou-Formation isochronal strata frameworks are established, and then the seismic sedimentology is studied, the sedimentary packing and evolving histories are restored in Qingshankou-Formation various types of gravity flow reservoirs are on the basis of gravity flow sedimentary structure identification of sliding rock, sandy debris flow, turbidite rock, storm and other types of sedimentary gravity flow, study finds deposition and depositional slope break and earthquake triggering mechanism, mountain torrents and other related.
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Héquette, Arnaud, and Philip R. Hill. "Late Quaternary seismic stratigraphy of the inner shelf seaward of the Tuktoyaktuk Peninsula, Canadian Beaufort Sea." Canadian Journal of Earth Sciences 26, no. 10 (October 1, 1989): 1990–2002. http://dx.doi.org/10.1139/e89-168.
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This paper describes the seismic stratigraphy of the Quaternary sediments on the inner shelf (< 20 m water depth) of the Canadian Beaufort Sea, seaward of the Tuktoyaktuk Peninsula. Two regional unconformities and three seismic sequences are defined from the high-resolution seismic records. The deeper sequence (sequence III) is characterized by large-scale cross-beds. This sequence has been correlated with the Tingmiark Sand lithostratigraphic unit, which was previously defined farther offshore and is thought to be a glaciofluvial unit deposited during lower-than-present sea-level conditions in the Late Wisconsinan. The lower boundary of the overlying sequence (sequence II) is an unconformity (u/c 2), interpreted as the pre-transgression land surface. Sequence II is discontinuous and consists of localized basin-fill and channel-fill units. Most of these are remnants of thermokarst lakes partially eroded during the Holocene transgression. This sequence is separated from the uppermost sequence (sequence I) by another unconformity (u/c 1), which is the shoreface erosion surface generated by the Holocene sea-level rise. Sequence I is composed of a transgressive sand sheet overlain, in deeper areas, by recent marine muds. Seaward of Hutchison Bay, a large subbottom depression within sequence III in interpreted as a Late Wisconsinan fluviatile channel. According to our seismic interpretation, the Tuk Phase morainal and glaciofluvial deposits existing onland on the Tuktoyaktuk Peninsula, previously assigned to the Early Wisconsinan, would be of Late Wisconsinan age.
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Michelsen, Olaf. "Stratigraphic correlation of the Danish onshore and offshore Tertiary successions based on sequence stratigraphy." Bulletin of the Geological Society of Denmark 41 (November 30, 1994): 145–61. http://dx.doi.org/10.37570/bgsd-1995-41-14.
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The results of a sequence stratigraphic study of the Tertiary sedimentary succession in the Danish North Sea sector, and the adjacent parts of the Norwegian, German, and Dutch sectors are reviewed in the present paper. Lithology and thickness variations of seven major sequence stratigraphic units, comprising twentyone sequences, are shortly described. The chronostratigraphic and genetic relationships between the North Sea sequences and the Danish onshore lithostratigraphic formations are emphasized. Six major sequence stratigraphic boundaries are pointed out, being time-equivalent with regional unconformities in the onshore area. The six surfaces bound five sedimentary packages, which are isochronous in their recognized lateral extension, and comprise genetically related deposits. It is suggested to define the five units as allostratigraphic units, and thus to create a stratigraphic subdivision, which is mappable in the southeastern North Sea region, possibly in the main part of the North Sea. The five allostratigraphic units can be identified in all areas by the available data; seismic sections and logs in the offshore area, and lithology in onshore outcrops and shallow wells. The definition of an allostratigraphic scheme would create a common nomenclature across the national borders and the present coastlines, and hopefully increase the accuracy of the chronostratigraphic correlation between profiles in the North Sea region.
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Cadena, Andrea F., and Roger M. Slatt. "Seismic and sequence stratigraphic interpretation of the area of influence of the Magdalena submarine fan, offshore northern Colombia." Interpretation 1, no. 1 (August 1, 2013): SA53—SA74. http://dx.doi.org/10.1190/int-2013-0028.1.
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The area of influence of the Magdalena submarine fan, offshore northern Colombia, is a global frontier basin with sparse well control and only publically available 2D seismic from which to conduct exploration surveys. We have conducted a 2D seismic stratigraphic study to advance knowledge of the tectonostratigraphic evolution of this area and, furthermore, optimize exploration concepts to include stratigraphy and sedimentology to enhance such opportunities. Eight third-order seismic sequences from the early Miocene to Holocene comprise the stratigraphic record. Seismic character, thickness, and sedimentary processes vary in each sequence based on the area of deposition. Three geomorphologic areas are subject to deposition: the Tayrona depression, the undeformed central Magdalena fan and deformed wedges on either side of the fan. From oldest to youngest, sequences I to V represent bathyal paleo-environments that were deformed during the late Miocene Andean phase. Deformation of these sequences is thin skinned thrust sheets, where the main basal detachment corresponds to Oligocene shale. This deformation continued until the middle Pliocene, when sequence VI and VII were deposited on the Magdalena Fan mainly as mass transport and channel-levee deposits. Sequence VIII represents the record from early Pleistocene to the present time. From early Pliocene to present, erosion was mainly the product of submarine fan activity and bypass in areas of high slope, whereas for older deposits, erosion was caused by exposure to subaerial conditions. Superimposed on the third-order sequences are fourth-order sequences, which reveal a relative (tectonic-eustatic) sea level increase from Early Miocene to middle Late Miocene (Tortonian) time, followed by a lowstand event that extended until Holocene time. Potential reservoirs embedded within the sequences include sheet sands, channel fills, and levee-overbank. Other components of the petroleum system such as a mature source rock are still under debate.
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Li, Ang, Lai Xing Cai, Shuang Liu, and Qi Li. "Characteristics of Sedimentation Evolution Based on the Sequence Stratigraphic Frameworks in Shahezi Formation of Southern Xujiweizi Fault Depression." Advanced Materials Research 1010-1012 (August 2014): 1359–64. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1359.
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Many scholars in China introduced the theory of sequence stratigraphy,applying to Chinese continental fault depression lake, they have made a lot of achievements in scientific research. However, there are still a lot of controversy according to the establishment in Shahezi group of sequence stratigraphic framework in Xujiaweizi fault depression.Sequence boundary identification method in this paper is based on the “instruction of Vail’s sequence stratigraphy theory, identification of seismic unconformity, verification by using logging methords”. And, following the principle of isochronous ,sequence stratigraphic framework of this region is established clearly. The southern Xujiaweizi fault depression in Shahezi group is divided into 1 second grade sequence, in the interior distributed SQ1-SQ4 4 third grade sequences from the bottom. Developmental stages at the bottom of SQ1 and the top of SQ4, basin is small and water is shallow. However, Developmental stages in SQ2 and SQ3,water enters the lake basin continuously, formed a sedimentary background of “wide basin and deep water”. In addition, each of the three grade sequence has split structure, the lake transgressive domain and lake regression domain two system tracts. Besides, the reversed order para-sequence sets caused by the lake regression and progradation set on the positive para-sequence sets caused by the lake transgression and retrogradation. On the basis of sequence stratigraphic division and correlation, conbined with the regional construction and the supply of provenance ,the sedimentary sequence framework of evolution characteristics are studied.That fan delta,braided river delta, lacustrine are the main facies types in study area. Characteristics of sedimentary evolution there are like this: the characteristics of sedimentation evolution show framework controls sand, succession of evolution, separated-source sedimentary, contiguously distribution.
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Madsen, Henrik, and Ole R. Clausen. "Generation of accomodation space around the D-1 fault during the Oligocene, Danish North Sea." Danmarks Geologiske Undersøgelse Serie C 12 (December 31, 1995): 69–83. http://dx.doi.org/10.34194/seriec.v12.7110.
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Implications of a sequence stratigraphic study of the Oligocene sediments in the Norwegian-Danish Basin around the D-1 well are presented. The study is based on seismic mapping, log interpretations and detailed dating. This paper focuses on the evolution of the accommodation space along and across the D-1 fault since the fault generated deviations in the available accommodation space and has a significant influence on the depositional geometry of the sequences. The results show that displacement across the D-1 is fairly constant along strike during deposition of the older Oligocene sequences. This is in contrast to the youngest Oligocene sequence which has a higher displacement rate and thus significant variations along strike. This emphasises, that the understanding of the structural evolution of local faults in a basin dominated by elastic sediment infill as the Tertiary North Sea has to be as detailed as the sequence stratigraphy, because the fault may have had a significant influence on the depositional geometry, and hence the complete sequence stratigraphic interpretation.
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Moore Jr., Theodore C., David K. Rea, Larry A. Mayer, C. F. Michael Lewis, and David M. Dobson. "Seismic stratigraphy of Lake Huron – Georgian Bay and postglacial lake level history." Canadian Journal of Earth Sciences 31, no. 11 (November 1, 1994): 1606–17. http://dx.doi.org/10.1139/e94-142.
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Five seismic reflectors in the basinal sedimentary section have been identified as representing erosional surfaces in shoaler regions of the lake basins and can be traced throughout most of the study area. The reflectors representing these erosional surfaces, and their conformable equivalents in the deep lake basins, are caused by intervals of coarser grain size in the sediments and are thought to represent lowering of lake levels prior to, and following, the Main Algonquin highstand (about 10.2 – 11.0 ka). These reflectors are used to define seismic sequences in the postglacial sedimentary fill of the basins. Two additional erosional surfaces, which closely follow the initial fall of the Main Algonquin lake level, are most clearly seen in thicker sections found in the northern part of the basins. The two oldest (pre-Main Algonquin) sequences appear to onlap highs and fill in lows within the basins, whereas the younger sequences (associated with the Main Algonquin through Mattawa times) tend to drape the topography and show little difference in thickness between the lows and their adjacent highs. The most recent sedimentary sequence represents deposition occurring since about 7.5 ka. It laps out against topographic highs and leaves older sequences exposed at the lake floor in many areas. The most pronounced erosional surfaces are associated with the Light Green and the Light Blue sequence boundaries. The Light Green sequence has a pair of coarser layers at its top, which are dated at 9.6 – 9.8 ka and 9.05 – 9.2 ka. The coarser interval at the top of the Light Blue sequence is dated at 7.45 – 7.80 ka. These layers are thought to mark maximum lake level lowstands and to represent the times of Ottawa–Marquette to latest Mattawa lake level fluctuation.
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Oliveira Nunes, Caio, and Michael Holz. "Tectonic and stratigraphic evolution of southern Jacuípe Basin (Brazil) based on seismic sequence stratigraphy." Journal of South American Earth Sciences 96 (December 2019): 102370. http://dx.doi.org/10.1016/j.jsames.2019.102370.
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Firmansyah, Yusi, Dhehave Riaviandhi, and Reza Muhammad Ganjar Gani. "Sikuen Stratigrafi Formasi Talang Akar Lapangan “Dr”, Sub–Cekungan Jambi,Cekungan Sumatera Selatan." Bulletin of Scientific Contribution 14, no. 3 (January 26, 2017): 263. http://dx.doi.org/10.24198/bsc.vol14.yr2016.art10970.
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The area of this study include to PT. Energi Mega Persada Tbk work area. The area of this study is located in Jambi Sub - Basin, South Sumatera Basin. This study is emphasized to examine the sequence stratigraphy of Talang Akar Formation. The data that is used in this study include core, mudlog, 3D seismic, well log, and palynomorf fossil. The result of those data analysis and data correlation are lithofacies, electrofacies, depositional environment, and stratigrahys sequences of Talang Akar Formation. From data analysis, the facies’ that develop in Talang Akar Formation are A, B, C, D, E, F, G, H, I, J, K, L, and M. Those facies’are deposited in fluvial – deltaicenvironment at Late Oligocene until Early Miocene. From the well correlation and seismic interpretation, the sediment distribution pattern of Talang Akar Formation become thicker and deeper in the west side and the highland is located relatively in the east of the study area. At the area of study Talang Akar formation is very influenced by structure. From the lithofacies and electrofacies analysis, there are six kinds of stratigraphy sequencesthat develop in the study area. System tracts LST-1 (braided channel) just developed at sequence-1. The other sequences developed TST 1 – 4 (floodplain meandering channel), TST 5 – 6 (marsh delta plain), HST 1 – 4 (crevasse splay meandering channel) and HST 5 – 6 (floodplain delta plain). . Keywordsi: Sequence stratigraphy, facies,depositional environment, Talang Akar Formation, Jambi Sub - Basin. Daerah penelitian termasuk ke dalam wilayah kerja PT. Energi Mega Persada Tbk. Daerah penelitian berada di Sub – Cekungan Jambi, Cekungan Sumatera Selatan. Studi ini difokuskan untuk membahas sikuen stratigrafi Formasi Talang Akar. Dalam penelitian ini, data yang digunakan adalah core, mudlog, seismik 3 dimensi, well log, dan fosil palinomorf. Hasil dari analisis dan korelasi data tersebut adalah litofasies, elektrofasies, sikuen stratigrafi, dan lingkungan pengendapan dari Formasi Talang Akar. Dari analisis data tersebut didapatkan bahwa fasies yang berkembang pada Formasi Talang Akar adalah fasies A, B, C, D, E, F, G, H, I, J, K, L, dan M. Fasies tersebut diendapkan di lingkungan fluvial – deltaic pada umur Oligosen Akhir sampai Miosen Awal. Berdasarkan korelasi antar sumur dan interpretasi seismik, distribusi sedimen Formasi Talang Akar lebih menebal dan mendalam pada sisi barat dengan tinggian yang berada relatif pada bagian timur daerah penelitian. Pada daerah penelitian Formasi Talang Akar sangat dipengaruhi oleh struktur serta berdasarkan analisis litofasies dan elektrofasies terdapat 6 sikuen yang berkembang pada daerah penelitian. System tracts LST-1 (braided channel) hanya berkembang pada sikuen-1. Pada sikuen lainnya berkembang TST 1 – 4 (floodplain meandering channel), TST 5 – 6 (marsh delta plain), HST 1 – 4 (crevasse splay meandering channel) dan HST 5 – 6 (floodplain delta plain). Kata kunci : Sequence stratigraphy, facies, depositional environment, FormasiTalang Akar, Sub Cekungan Jambi.
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Sun, X. W. "PREDICTION OF CARBONATE RESERVOIRS AND TRAPS BY APPLYING SEQUENCE STRATIGRAPHY IN THE EASTERN WARBURTON BASIN, SOUTH AUSTRALIA." APPEA Journal 38, no. 1 (1998): 380. http://dx.doi.org/10.1071/aj97018.
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The Early Palaeozoic eastern Warburton Basin unconformably underlies the Cooper and Eromanga Basins. Four seismic sequence sets (I−IV) are interpreted. Among them, sequence set II is subdivided into four Cambro-Ordovician depositional sequences. Sequence 1, the oldest, is a shallow shelf deposit that occurs only in the Gidgealpa area. Sequences 2 and 3 were deposited in a wider area; from west to east, environments varyied from deep siliciclastic ramp, carbonate inner-shelf, peritidal, shelf edge, and slope-to-basin. Their seismic reflection configurations are high-amplitude, regionally parallel-continuous, layered patterns, locally mounded geometry, as well as divergent-fill patterns. Sequence 4, the youngest, was deposited in a mixed siliciclastic and carbonate, storm-dominate shelf. Its seismic reflection configurations are moderate amplitude, parallel-layered patterns, decreasing in amplitude upwards.Boundaries between the four sequences generated good secondary porosity in the carbonates. Karst development is interpreted to have generated much of this porosity in shelf and peritidal carbonates, and carbonate build-ups. Shoal-water sandy limestone and calcareous sandstone of Sequence 4 may be other potential reservoir rocks. Potential source rocks comprise mudstone and shale of slope and basin lithofacies. There are two kinds of stratigraphic trap. One is in Sequences 2 and 3, associated with high-relief carbonate build-ups encased in lagoonal mudstone and shelf edge sealed by transgressive siltstone and shale. The other is a transgressive marine shale enclosing porous dolostone of the karstified Sequence 1. In addition, petroleum may have migrated from Permian source rocks of the Cooper Basin to karstified carbonate reservoirs of the Warburton Basin at unconformities.
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Le Roy, P., F. Guillocheau, A. Piqué, and A. M. Morabet. "Subsidence of the Atlantic Moroccan margin during the Mesozoic." Canadian Journal of Earth Sciences 35, no. 4 (April 1, 1998): 476–93. http://dx.doi.org/10.1139/e97-111.
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This paper presents a combined study based on seismic interpretation, sequence stratigraphy, and the evaluation of subsidence that aims to characterize the structure and development of the Essaouira Basin in Morocco. Located in the coastal Meseta adjoining the continental margin, this basin records an initial Carnian-Hettangian deformation phase during rifting in the central part of the North Atlantic region. The geometry of the basin as a function of time shows a succession of half-grabens and horsts that developed westwards from reactivated Hercynian structures. The postrift stage is characterized by an aggrading sedimentary sequence, as shown by concordant seismic sequences stacking over the onshore part of the basin. The Upper Cretaceous coincides with a sequence showing a transition towards a prograding regime that leads to the topography of the present-day margin. Using the high-resolution analysis provided by sequence stratigraphy, it is possible to recognize fine-scale stratigraphic variations in the sedimentary succession. The well-to-well correlation of sedimentary cycles forms a dataset for evaluating subsidence. Residual subsidence curves reveal a differential behaviour between the present onshore and offshore areas. Although the computed subsidence rates are low across the onshore zone, curves for the western offshore part of the basin follow theoretical lithospheric cooling curves that are compatible with a stretch factor ( beta ) of nearly 1.4. Steep temporary gradients on the computed curves may be correlated with tectonic phases documented across the North Atlantic region that exerted a tight control on the development of the Essaouira Basin from Triassic rifting until the uplift of the Atlas Mountains during the Cenozoic.
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Alvarenga, Renata dos Santos, Juliano Kuchle, David Iacopini, Karin Goldberg, Claiton Marlon dos Santos Scherer, George Pantopoulos, and Patrycia Leipnitz Ene. "Tectonic and Stratigraphic Evolution Based on Seismic Sequence Stratigraphy: Central Rift Section of the Campos Basin, Offshore Brazil." Geosciences 11, no. 8 (August 12, 2021): 338. http://dx.doi.org/10.3390/geosciences11080338.
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The rift section of the Brazilian basins represent the sedimentary record associated with the first stages of Gondwana break-up in the Early Cretaceous phase (Berriasian to Aptian). The rift succession of the Campos Basin constitutes one of the main petroleum systems of Brazil’s marginal basins. This interval contains the main source rock and important reservoirs in the Lagoa Feia Group deposits. The Lagoa Feia Group is characterized by siliciclastic, carbonate and evaporite sediments deposited during the rift and post-rift phases. Despite the economic relevance, little is known in stratigraphic terms regarding this rift interval. To date, most studies of the Lagoa Feia Group have adopted a lithostratigraphic approach, while this study proposes a tectonostratigraphic framework for the deep-rift succession of the Campos Basin (Lagoa Feia Group), using the fundamentals of seismic sequence stratigraphy. This work also aims to establish a methodological and practical procedure for the stratigraphic analysis of rift basins, using seismic data and seismofacies, and focusing on tectonicstratigraphic analysis. The dataset comprised 2D seismic lines, core and lithological logs from exploration wells. Three seismic facies were identified based on reflector patterns and lithologic data from well cores, providing an improved subdivision of the pre-, syn- and post-rift stages. The syn-rift stage was further subdivided based on the geometric patterns of the reflectors. Tectonics was the main controlling factor in the sedimentary succession, and the pattern and geometry of the seismic reflectors of the syn-rift interval in the Campos Basin allowed the identification of three tectonic systems tracts: (i) a Rift Initiation Systems Tract; (ii) a High Tectonic Activity Systems Tract and (iii) a Low Tectonic Activity Systems Tract.
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Ning, Zhao, Gao Xia, Huang Jiangqin, Chen Zhongmin, and Zhang Guangya. "Sedimentary Characteristics and Lithological Trap Identification of Distant Braided Delta Deposits: A Case on Upper Cretaceous Yogou Formation of Termit Basin, Niger." E3S Web of Conferences 53 (2018): 03020. http://dx.doi.org/10.1051/e3sconf/20185303020.
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Lithological trap identification in thin sand and thick shale layers is still a challenge for hydrocarbon exploration. Based on the high-resolution sequence stratigraphy theory and the establishment of high-resolution sequence stratigraphy framework with seismic-well tie, the dynamic deposition process of braided delta sands on late Cretaceous Yogou formation has been analyzed on 62 wells in passive rifting Termit basin with multi-stages depressions and reversals. (1) Six kinds of sedimentary microfacies and three major reservoir sands with multi-stages vertical stacking and lateral migration are in late Cretaceous; (2) Based on accommodation space/Sediments supply change and depositional progress, sedimentary facies distribution evolution has been done according to sands thickness statistics of sedimentary micro-facies, and narrow-time seismic attributes and slices analysis, multi-sources braided delta depositional model has been concluded; (3) Based on source rock and caprock evaluation, with reservoir sands distribution and faults impact on Yogou formation of Termit basin, four types of traps, including structure-lithology, Structure-strata, stratigraphic and lithology are concluded. Traps influencing factors, i.e., structure geometry, sands distribution, paleotopography, stratigraphy cycling, sand/shale lateral connection, reservoir quality and so on, have different impacts on these traps, and different lithologic-stratigraphy traps have different exploration risks. Structure geometry and sands distribution are very important for the structure-lithology traps; structure geometry and paleotopography are the key factors in Structure-strata traps. Sands distribution and reservoir quality can be focused on lithology traps. Moreover, paleotopography and sand/shale lateral connection are significant on stratigraphic traps. Therefore, different hydrocarbon accumulation types of lithological traps have been established.
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ALIOTTA, SALVADOR, SILVIA S. GINSBERG, DARÍO GIAGANTE, LAURA G. VECCHI, and MARTA M. SALVATIERRA. "Seismic Stratigraphy of Pleistocene Deltaic Deposits in Bahía Blanca Estuary, Argentina." Anais da Academia Brasileira de Ciências 86, no. 2 (June 2014): 649–62. http://dx.doi.org/10.1590/0001-3765201420130243.
Full textAbstract:
The Bahía Blanca estuary (Argentina) has a morphological configuration resulting from hydrological and sedimentary processes related to Late Quaternary sea level changes. This estuarine system occupies a large coastal plain with a dense net of tidal channels, low-altitude islands and large intertidal flats. Little is known about the sedimentary units of the marine subbottom. Therefore, a stratigraphical analysis of the northern coast of Bahía Blanca estuary was carried out using high resolution seismic (3.5 kHz) in order to: i) define Quaternary sequences, ii) describe sedimentary structures, and iii) determine the paleoenvironmental conditions of sedimentation. The seismic stratigraphic data collected and their correlation with drilling lithological data show five seismic sequences (S1, S2, S3, S4 and S5), of which S1-S2 were found to be associated with a continental paleoenvironment of Miocene-Pleistocene age. Sequences S3 and S4, whose lithology and seismic facies (paleochannel structures and prograding reflection configurations), were defined on these materials, to evidence the development of an ancient deltaic environment which was part of a large Pleistocene drainage system. The S5 sequence was formed during the Holocene transgressive-regressive process and complete the seismostratigraphic column defined in the present study.
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Ju, Yong Tao, Hao Liu, Chun Chen Zhao, and Tao Guo. "Researches on Sequences Stratigraphy of Neogene in Huanghekou Sag, Bohai Bay Basin, China." Advanced Materials Research 734-737 (August 2013): 507–10. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.507.
Full textAbstract:
The Huanghekou Sag, as an important oil-bearing zone, is located in the southeastern part of the Bohai Bay basin. It has higher values for petroleum exploration-especially in Neogene. The Neogene was a depressional lacustrine period and was characterized with both tectonically stable and gentle topography. Thus it is difficult to identify and subdivide sequences using the traditional method. Based on the practical geologic setting and current data of the Neogene of Huanghekou Sag, using the new method to set up the isochronous sequence stratigraphic framework. By analyzing climate cycle, drilling well and logging cycle, seismic cycle and the identification of unconformity of seismic and drilling well and logging data, the Neogene was divided into 5 third-order sequences and 10 systems tracts. In different sequence sets and systems tract, which was controlled by climate, ratio rate between sedimentary being supplied and accommodated, the sand body scale was different.