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Academic literature on the topic 'Preuss Sandstone'
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Journal articles on the topic "Preuss Sandstone"
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Hudson, Mark R., Richard L. Reynolds, and Neil S. Fishman. "Synfolding magnetization in the Jurassic Preuss Sandstone, Wyoming-Idaho-Utah Thrust Belt." Journal of Geophysical Research: Solid Earth 94, B10 (October 10, 1989): 13681–705. http://dx.doi.org/10.1029/jb094ib10p13681.
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Reynolds, R. L., N. S. Fishman, and M. R. Hudson. "Sources of aeromagnetic anomalies over Cement oil field (Oklahoma), Simpson oil field (Alaska), and the Wyoming‐Idaho‐Utah thrust belt." GEOPHYSICS 56, no. 5 (May 1991): 606–17. http://dx.doi.org/10.1190/1.1443077.
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Geochemical and rock magnetic studies, undertaken to determine the cause of magnetic anomalies over Cement oil field (Anadarko basin, Oklahoma), Simpson oil field (North Slope basin, Alaska), and the Wyoming‐Idaho‐Utah thrust belt, have revealed different magnetic sources developed under different sedimentologic, geochemical, and structural settings. At Cement, ferrimagnetic pyrrhotite ([Formula: see text]), typically intergrown with more abundant, nonmagnetic pyrite ([Formula: see text]), formed as a result of hydrocarbon seepage. Sulfur isotopic data indicate that sulfur in the Fe‐S minerals was probably derived from two different sources: (1) isotopically heavy, thermochemical [Formula: see text] in petroleum, and (2) isotopically light [Formula: see text] generated by sulfate‐reducing bacteria that derived metabolic energy from leaking hydrocarbons or organic compounds derived from hydrocarbons. Although pyrrhotite may make a minor contribution to the reported total magnetic field anomalies at Cement, the measured anomalies are probably mostly caused by man‐made features such as buried well casings and pipelines. Magnetite, found in well cuttings from Cement and previously considered the source of the anomalies, is contamination from drilling. At Simpson, ferrimagnetic greigite ([Formula: see text]) is concentrated locally in Upper Cretaceous beds. A preliminary geochemical study reveals a complicated picture in which early diagenetic chemical and mineralogic changes are variably overprinted by later epigenetic alterations, perhaps related to hydrocarbon seepage. The greigite probably formed at different times from sulfate reduction by bacteria that used either organic compounds derived from hydrocarbons or detrital organic matter, or both, as food sources. Magnetic‐property studies suggest the natural remanent magnetization of greigite‐bearing rocks may contribute to the magnetic anomalies. In the thrust belt, the Middle Jurassic Preuss Sandstone has magnetizations as much as 0.76 A/m (average 0.14 A/m) west of the Absaroka fault where aeromagnetic anomalies locally correspond to exposures of the Preuss and much lower magnetizations (average [Formula: see text]) east of the Absaroka fault. The magnetization is carried by rounded titanium‐bearing detrital magnetite, commonly concentrated along heavy‐mineral laminations. Carbon isotopic compositions of calcite cement (−2.4 to +1.5 per mil) reflect an absence of organic carbon in the calcite and thus suggest that hydrocarbon had no role in the preservation of the detrital magnetite. Our results show that abiologic and biologic mechanisms can generate different magnetic sulfide minerals in zones of sulfidic hydrocarbon seepage. More commonly, sulfidic seepage could either diminish magnetization by replacement of detrital magnetic minerals with nonmagnetic sulfide minerals, or it would have no effect on magnetization if such detrital minerals were originally absent. An important negative result is the absence of abundant secondary (diagenetic) magnetite in the seepage environments. Although secondary magnetite occurs in some biodegraded crude oils, concentrations of such magnetite capable of producing aeromagnetic anomalies have not been documented.
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Rong, Huren, Jingyu Gu, Miren Rong, Hong Liu, Jiayao Zhang, and Hao Dong. "Strength and Microscopic Damage Mechanism of Yellow Sandstone with Holes under Freezing and Thawing." Advances in Civil Engineering 2020 (April 30, 2020): 1–13. http://dx.doi.org/10.1155/2020/5921901.
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In order to study the damage characteristics of the yellow sandstone containing pores under the freeze-thaw cycle, the uniaxial compression test of saturated water-stained yellow sandstones with different freeze-thaw cycles was carried out by rock servo press, the microstructure was qualitatively analyzed by Zeiss 508 stereo microscope, and the microdamage mechanism was quantitatively studied by using specific surface area and pore size analyzer. The mechanism of weakening mechanical properties of single-hole yellow sandstone was expounded from the perspective of microstructure. The results show the following. (1) The number of freeze-thaw cycles and single-pore diameter have significant effects on the strength and elastic modulus of the yellow sandstone; the more the freeze-thaw cycles and the larger the pore size, the lower the strength of the yellow sandstone. (2) The damage modes of the yellow sandstone containing pores under the freeze-thaw cycle are divided into five types, and the yellow sandstone with pores is divided into two areas: the periphery of the hole and the distance from the hole; as the number of freeze-thaw cycles increases, different regions show different microscopic damage patterns. (3) The damage degree of yellow sandstone is different with freeze-thaw cycle and pore size. Freeze-thaw not only affects the mechanical properties of yellow sandstone but also accelerates the damage process of pores. (4) The damage of the yellow sandstone by freeze-thaw is logarithmic function, and the damage of the yellow sandstone is a power function. The damage equation of the yellow sandstone with pores under the freezing and thawing is a log-power function nonlinear change law and presents a good correlation.
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Poláček, Josef, and Alena Kožušníková. "Experiments on Rocks Under High Pressure Conditions in GTA 20-32 Triaxial Press / Experimenty Na Horninách Ve Vysokotlakém Triaxiálním Lisu GTA 20-32." GeoScience Engineering 58, no. 1 (March 1, 2012): 9–16. http://dx.doi.org/10.2478/v10205-011-0009-z.
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Abstract The paper describes the methodology of measurements in the GTA 20-32 triaxial press. The deformation behaviour of two different types of rocks was compared: - gypsum with plastic deformation even at lower confining pressure, - Carboniferous sandstone with brittle failure even at the highest confining pressure. The influence of gypsum layering was studied as well. The experimental results show that the deformation and strength properties of the gypsum in the triaxial state of stress do not significantly depend on the orientation of axial stress to the observed layering.
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Pinińska, J., and A. Dziedzic. "Volume Density and Longitudinal Wave Velocity Changes of the Ciezkowice and Krosno Flysch Sandstones under High Pressure and Temperature in the Triaxial Test Condition / Zmiany Gestosci Objetosciowej I Predkosci Fali Podłuznej Skał Fliszowych: Piaskowców Ciezkowickich I Krosnienskich Pod Wpływem Wysokiego Cisnienia I Temperatury W Warunkach Trójosiowego Sciskania." Archives of Civil Engineering 57, no. 1 (March 1, 2011): 73–85. http://dx.doi.org/10.2478/v.10169-011-0007-3.
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Abstract The poorly cemented Ciężkowice poorly sorted sandstone and the compact Mucharz fine grain sandstone have been laboratory tested at the triaxial compressing conditions in thermo-pressurized chamber of a rigid press MTS-815. The confining pressure: P = σ2 = gσ3 range from 0 to 96 MPa and the temperature: T from 22°C to 120°C (simulated 500 m intervals from the surface to the depth of 3500 m). During (the) each test, the characteristics of deformation and the elastic wave velocity paths were simultaneously monitored. The volume density and longitudinal wave velocity showed a non-linear increase with the progress of simulated depth, a volume density growth by 1.6 to 4.0%, and the elastic wave velocity up to 250% of the primary value (surface condition), dependable on loading path, phase of deformation, and varying type of lithology. That may lead to wide error margin in a determination of rock’s engineering properties and also create discrepancies between the static parameters of rocks (Est ,gνst ) determined by standard laboratory load tests, and the dynamic parameters (Ed, νd ) determined from the wave velocity and volume density
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Guo, H., J. Voncken, T. Opstal, R. Dams, and P. L. J. L. J. Zitha. "Investigation of the Mitigation of Lost Circulation in Oil-Based Drilling Fluids by Use of Gilsonite." SPE Journal 19, no. 06 (May 16, 2014): 1184–91. http://dx.doi.org/10.2118/157751-pa.
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Summary Fluid-loss control is an essential property of oil-based mud (OBM) that can affect the success of drilling operations. This paper presents an investigation of the mitigation of lost circulation in OBM by use of leakoff-control-additive gilsonite. A simple physical model was developed to describe the static-filtration process considering the formation and properties of the filter cake. Both high-pressure/high-temperature (HP/HT) American Petroleum Institute (API) press and core-flow-filtration experiments were performed to evaluate the leakoff behavior of OBM. Core-filtration experiments were carried with the aid of a computerized-tomography (CT) scanner to monitor the invasion of the filtrate into the sandstone core at time intervals. In the long time limit, the model predicts that the fluid loss follows the classical Carter equation; that is, the volume of leakoff increases as the square root of time for the static filtration through a filter paper and through the sandstone core. Dual-mode filtration diminishes the rate of fluid loss considering the effect of emulsion. The model also provides a relation between pressure drop and filtrate rate, which can be used to estimate the permeability of filter cake in the experiment. The leakoff behavior with additive observed in the experiment is well-explained by the microstructure of rapid-buildup filter cake, which is mainly responsible for the control of fluid loss. The role of different components of OBM, such as solid particles, emulsion droplets, and additives, is discussed in light of our observations.
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Gamal, Hany, Salaheldin Elkatatny, Abdulazeez Abdulraheem, and Abdulaziz Al Majed. "Exposure Time Impact on the Geomechanical Characteristics of Sandstone Formation during Horizontal Drilling." Molecules 25, no. 11 (May 27, 2020): 2480. http://dx.doi.org/10.3390/molecules25112480.
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The rock geomechanical properties are the key parameters for designing the drilling and fracturing operations and for programing the geomechanical earth models. During drilling, the horizontal-section drilling fluids interact with the reservoir rocks in different exposure time, and to date, there is no comprehensive work performed to study the effect of the exposure time on the changes in sandstone geomechanical properties. The objective of this paper is to address the exposure time effect on sandstone failure parameters such as unconfined compressive strength, tensile strength, acoustic properties, and dynamic elastic moduli while drilling horizontal sections using barite-weighted water-based drilling fluid. To simulate the reservoir conditions, Buff Berea sandstone core samples were exposed to the drilling fluid (using filter press) under 300 psi differential pressure and 200 °F temperature for different exposure times (up to 5 days). The rock characterization and geomechanical parameters were evaluated as a function of the exposure time. Scratch test was implemented to evaluate rock strength, while ultrasonic pulse velocity was used to obtain the sonic data to estimate dynamic elastic moduli. The rock characterization was accomplished by X-ray diffraction, nuclear magnetic resonance, and scanning electron microscope. The study findings showed that the rock compression and tensile strengths reduced as a function of exposure time (18% and 19% reduction for tensile strength and unconfined compression strength, respectively, after 5 days), while the formation damage displayed an increasing trend with time. The sonic results demonstrated an increase in the compressional and shear wave velocities with increasing exposure time. All the dynamic elastic moduli showed an increasing trend when extending the exposure time except Poisson’s ratio which presented a constant behavior after 1 day. Nuclear magnetic resonance results showed 41% porosity reduction during the five days of mud interaction. Scanning electron microscope images showed that the rock internal surface topography and internal integrity changed with exposure time, which supported the observed strength reduction and sonic variation. A new set of empirical correlations were developed to estimate the dynamic elastic moduli and failure parameters as a function of the exposure time and the porosity with high accuracy.
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Środoń, J. "Quantification of illite and smectite and their layer charges in sandstones and shales from shallow burial depth." Clay Minerals 44, no. 4 (December 2009): 421–34. http://dx.doi.org/10.1180/claymin.2009.044.4.421.
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AbstractPrecise measurement of the content and the layer charge of illite and smectite is an important aspect of the mineralogical calibration of geophysical well logs and of the evaluation of mechanical and chemical properties of sedimentary rocks. Ate chnique for obtaining such measurements was developed during mineralogical studies of the Miocene clastic rocks from the Carpathian Foredeep. X-ray diffraction (XRD), chemical, cation exchange capacity (CEC), H2O sorption, and ethylene glycol monoethyl ether (EGME) sorption data were obtained for 65 samples of sandstones, shales and carbonates. The illite + smectite sum, involving all detected 2:1 minerals (smectite, illite-smectite, illite, glauconite and muscovite) was measured by XRD. The content of the illitic component was evaluated separately using % K2O and accounting for % K2O in K-feldspar. The content of the smectitic component was estimated from EGME retention using the reference data for a smectite standard, and from CEC assuming the smectitic layer charge of 0.41/O10(OH)2 (Środoń et al., in press). All these measurements produced very consistent results.
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Whyte, Christopher. "Beyond the Last Dragon: A Life of Edwin Morgan. By James McGonigal. Pp. xvi + 462. Dingwall: Sandstone Press, 2010. Hb. £24.99." Translation and Literature 21, no. 3 (November 2012): 435–42. http://dx.doi.org/10.3366/tal.2012.0094.
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Shalamanov, Viktor, and Musa Shabdanov. "The influence of the ratio of dimensions of rock samples on their tensile strength." E3S Web of Conferences 174 (2020): 01041. http://dx.doi.org/10.1051/e3sconf/202017401041.
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Annotation In the work, studies were carried out on the effect of the dimensions of rock samples and the shape of their end faces on the tensile strength limits. Sandstones, aleurolites and their interlayers were tested. The core diameter was 36-78 mm, prevailing 50-70 mm. Rocks are mainly me- dium- and fine-grained. The fracture of cores into pieces took place along thin layers of carbonaceous materials, aleurolites, cracks and cleavage, in places of accumulation and plaque of carbonaceous, carbonate and other weak substances in the form of continuous films, scattered spots and debris. All tests were carried out on the press in accordance with the recommenda- tions of the current GOST, samples were divided by applying a load along the generatrix. It was found that the tensile strength of the test samples var- ied from 0.15 to 21 MPa. The results obtained proved conclusively that cores can be used to solve production and technical problems without pre- liminary treatment of their end surfaces at the ratio of heights to diameters from 0.31 to 1.6. This will allow to increase the volume of tests of samples taken in wells by 60%, and obtain reliable information and thus more fully and reliably substantiate geomechanical conditions, Attachment and protec- tion of mine workings and optimal angles of slopes of quarry sides and ledges at open method of coal mining. This issue has been little studied and requires further research in every geological-economic region of Kuzbass.
Dissertations / Theses on the topic "Preuss Sandstone"
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Cook, Preston Scott. "Sedimentology and Stratigraphy of the Middle Jurassic Preuss Sandstonein Northern Utah and Eastern Idaho." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6206.
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The purpose of this study is to analyze the sedimentology and stratigraphy of the Middle Jurassic Preuss Sandstone and re-evaluate past sedimentological interpretations. The Preuss is located in northern Utah, western Wyoming and eastern Idaho and is stratigraphically equivalent to the Entrada Sandstone, which is Callovian in age (Dossett et al., 2014). This study is the first attempt at 1) a sequence stratigraphic framework, 2) a petroleum system analysis and 3) an extraterrestrial analog study for the Preuss. This study frames the Preuss within three broad facies groups: marine, coastal and terrestrial. The marine group includes the open marine and restricted marine facies with associated subfacies, the coastal group includes coastal sabkha and associated subfacies, and the terrestrial group includes alluvial, inland sabkha and eolian facies with associated subfacies. Three sections in northern Utah and one section in eastern Idaho compromise the focus of this study. The three Utah sections were measured and described, and samples were collected from two Utah sections and the Idaho section. The Preuss Sandstone was deposited in an asymmetrical retroarc basin, consequently the Preuss thickens from the east towards west-central Utah and the Jurassic Elko highlands. The deposits are mostly terrestrial, which is in accord with recent sedimentological interpretations, but at odds with the old paradigm, which postulates that the Entrada and Preuss were largely tidal in origin. There are marine transgressions within the trough of the retroarc basin, and the transgressions affect terrestrial sedimentary patterns. During marine incurstions, alluvium shed off the highlands is confined west of the seaway, and does not prograde east of the trough until all the available accommodation is filled. The Preuss was deposited during a complete third-order sequence-stratigraphic cycle that lies within the Lower Zuni II second-order lowstand. The Preuss Sandstone can be used as an outcrop analog for ancient and modern environments both here on Earth and on other planetary bodies. The petroliferous Norphlet Formation along the U.S. Gulf Coast was deposited in an environment very similar to the Preuss, but the Waltherian succession of facies might be slightly different. Likewise, the facies present in the Preuss are analogous to modern arid environments, such as the Persian Gulf. Furthermore, the alluvial, sabkha, eolian and shallow marine facies of the Preuss are highly similar to facies observed in ancient Martian environments and modern environments on Saturn's moon, Titan.
Books on the topic "Preuss Sandstone"
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Beaubouef, R. T., C. Rossen, Frederick B. Zelt, M. D. Sullivan, D. C. Mohrig, and D. C. Jennette. Deep-Water Sandstones, Brushy Canyon Formation, West Texas (Carolina Academic Press Law Casebook Series). American Association of Petroleum Geologists, 2000.
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Gillis, John R. Afterword. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198795155.003.0014.
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The point of greatest interest is the place where land and water meet.Ralph Waldo Emerson11Kenneth White, On the Atlantic Edge: A Geopoetics Project (Dingwall: Sandstone Press, 2006), 25.As Coastal Works so amply illustrates, we have never been so conscious of shores as we are today. Artists and writers were the first to colonize coasts in the nineteenth century, drawing in their wake the urban elites of Europe and America, followed by the middle and, ultimately, the working classes. Edges are where you will find artists, and, because islands are all edges, they fetch up there in great numbers. On Monhegan Island, off the coast of Maine, America’s most famous artist colony, painters jostle to set up their easels on the headlands made famous by three generations of Wyeths, Rockwell Kent, George Bellows, Edward Hopper, and so many others....