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Статті в журналах з теми "Cased hole"

Автор: Grafiati

Опубліковано: 12 жовтня 2024

Оновлено: 31 липня 2025

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1

Ramadhan, Mukhammad Rizqi, Hadziqul Abror, and Riska Laksmita Sari. "INTERPRETASI <i>CASED HOLE LOG</i> UNTUK MENENTUKAN <i>REMAINING OIL SATURATION</i> DAN INTERVAL PERFORASI PADA SUMUR R SUKOWATI FIELD." Petro : Jurnal Ilmiah Teknik Perminyakan 14, no. 2 (2025): 82–96. https://doi.org/10.25105/petro.v14i2.22172.

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Well R, a directional well with a depth of 8900 ft, has experienced significant production decline since its initial output of 2875 BOPD in 2011, now producing only 21 BOPD. This study aims to determine the remaining oil saturation and identify the optimal perforation intervals for Well R in Sukowati Field. Located in the East Java Basin, Sukowati Field has carbonate formations with potential as hydrocarbon reservoirs. The study utilized both open hole log and cased hole log data, particularly focusing on Carbon-Oxygen Log (C/O Log) analysis within a depth interval of 8100-8360 ft, to evaluate

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2

Varignier, Geoffrey, Pierre Chuilon, Emmanuel Caroli, et al. "Laboratory Experimental Validation of Sensitivity Functions for a Neutron Porosity Logging Tool in Casedhole Environments." Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description 66, no. 2 (2025): 294–316. https://doi.org/10.30632/pjv66n2-2025a7.

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Mature producing fields face the challenge of safely abandoning numerous wells. Casedhole logs can play a key role in the integrity and confinement assessment. Therefore, the industrial problem today is no longer to characterize some petrophysical properties of the rock formation but also some components of the well. Due to the large number of variables, a multiphysics inversion simultaneously considering different nuclear logs is mandatory. During the past 20 years, The University of Texas introduced the concept of flux sensitivity functions to predict logs and allow the inversion of formatio

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3

Mari, Jean Luc, and Pierre Gaudiani. "Geophysics on an experimental site." E3S Web of Conferences 342 (2022): 03001. http://dx.doi.org/10.1051/e3sconf/202234203001.

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APEC (Association Pédagogique et Expérimentale du Cher) has developed an experimental site, situated in the Cher region (France), both for the training of students and for professionals. The site is also used for experimental studies in near surface geophysics. The training in geophysics concerns the acquisition and processing of surface seismic data in 2D or 3D. On the site, two boreholes have been drilled for logging experiments, such as Vertical Seismic Profile (VSP), Full Waveform Acoustic logging (FWAL). During the drilling, some parameters such as rate of penetration (ROP) and Torque hav

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4

Tang, X. M., D. Patterson, and M. Hinds. "Evaluating Hydraulic Fracturing in Cased Holes With Cross-Dipole Acoustic Technology." SPE Reservoir Evaluation & Engineering 4, no. 04 (2001): 281–88. http://dx.doi.org/10.2118/72500-pa.

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Summary A cross-dipole technology was used to evaluate a carbonate formation in southeastern New Mexico to determine fracture trends in a waterflooded environment. The measurements were first made in open hole, then in cased hole before and after fracture stimulation. The cross-dipole data were processed to find the amount of shear-wave anisotropy and the associated azimuth. The results demonstrate that stimulated fractures create a substantial anisotropy and a well-defined azimuth behind casing. More important, by evaluating the anisotropy magnitude and azimuth from the cased-hole data, we ca

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5

Z. A., Alfageh. "Exploration of Hidden Hydrocarbons in Old Wells Magid Field - Sirte Basin, Libya." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (2021): 1189–92. http://dx.doi.org/10.22214/ijraset.2021.38143.

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Abstract: It is increasingly important to improve field productivity in today's competitive market. One way to achieve this, is to add new wells which are expensive and time consuming. The other alternative is to identify bypassed hydrocarbons, track changes in saturations and detect movement of reservoir fluid contacts from existing well bores already in place. It is considerably more cost effective and often more environmentally friendly to explore for those hidden hydrocarbons in old wells rather than drill new wells. As the field matures, there is a need to reevaluate the formation in olde

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6

Carpenter, Chris. "Cased-Hole Solution Assesses Tight Reservoirs." Journal of Petroleum Technology 72, no. 08 (2020): 55–56. http://dx.doi.org/10.2118/0820-0055-jpt.

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7

Jiang, Can, Xue-Lian Chen, Yuan-Da Su, and Xiao-Ming Tang. "Cased borehole acoustic-wave propagation with varying bonding conditions: Theoretical and experimental modeling." GEOPHYSICS 84, no. 4 (2019): D161—D169. http://dx.doi.org/10.1190/geo2018-0798.1.

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Acoustic measurements in cased boreholes are important for cement-bond evaluation behind the casing. In conjunction with a recently developed acoustic-wave theory using slip-boundary modeling, we carried out an experimental study for different cement-bond conditions. Four different cased-hole models were constructed, where the interface between the casing and the cement, and that between the cement and the formation, are decoupled or partially bonded to simulate the different cement bond conditions. An acoustic system is placed in the borehole to measure extensional casing waves along the bore

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8

Jambunathan, Venkataraman, FNU Suparman, Zhipeng Liu, Weijun Guo, and Daniel Dorffer. "Cased-hole interpretation workflow for determining residual oil saturation for mature fields." Interpretation 3, no. 1 (2015): SA135—SA142. http://dx.doi.org/10.1190/int-2014-0046.1.

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Formation evaluation for mature oil fields remains a challenge for operators. Rock-petrophysical properties present large uncertainties following years of production. Formation evaluation becomes even more challenging when there is a lack of open-hole logging data as is typically the case. Logging programs for cased-hole formation evaluation are limited by the size of the well completion. In addition, a metallic casing often prevents the effective use of electric measurements. However, pulsed-neutron tools (PNTs) are a viable option for mature fields. We developed a brief review of PNT theory.

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9

Gaurina-Međimurec, Nediljka, and Pavao Mesarić. "Application of Solid Expandable Tubulars in the Petroleum Industry." Rudarsko-geološko-naftni zbornik 37, no. 1 (2022): 163–80. http://dx.doi.org/10.17794/rgn.2022.1.14.

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The development of solid expandable tubular (SET) technology and products (open hole liner, open hole clad, cased hole liner, liner hanger, internal casing patch, etc.) has enabled operators to plan well design in a new way and solve various problems that arise during drilling and exploitation on land and offshore. By including an expandable open hole liner, monobore open hole liner or monobore openhole clad in well design, it is possible to achieve a slim hole design and/or resolve unwanted situations that occur during the drilling of problem zones with minimal hole size reduction and reach h

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10

Chinwe Ozowe, Oludayo Olatoye Sofoluwe, Ayemere Ukato, and Dazok Donald Jambol. "A comprehensive review of cased hole sand control optimization techniques: Theoretical and practical perspectives." Magna Scientia Advanced Research and Reviews 12, no. 1 (2024): 164–77. http://dx.doi.org/10.30574/msarr.2024.11.1.0079.

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Cased hole sand control is a critical aspect of oil and gas well management, ensuring efficient production by mitigating sand production issues. This review presents a comprehensive review of cased hole sand control optimization techniques, offering theoretical insights and practical perspectives to enhance well productivity and longevity. The review encompasses various aspects, including the challenges of sand production, the importance of sand control, and the evolution of sand control techniques. Sand production in oil and gas wells can lead to equipment damage, wellbore instability, and re

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11

Jacobson, Larry A., and Chu-Chiu Fu. "Computer Simulation of Cased-Hole Density Logging." SPE Formation Evaluation 5, no. 04 (1990): 465–68. http://dx.doi.org/10.2118/19613-pa.

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12

JPT staff, _. "Cased-Hole Completions Without Perforating Eliminate Risks." Journal of Petroleum Technology 57, no. 02 (2005): 24–25. http://dx.doi.org/10.2118/0205-0024-jpt.

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13

Bybee, Karen. "Drilling-Fluids Displacement and Cased-Hole Cleaning." Journal of Petroleum Technology 58, no. 11 (2006): 60–63. http://dx.doi.org/10.2118/1106-0060-jpt.

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14

Felder, R. D. "Cased-Hole Logging for Evaluating Bypassed Reserves." Journal of Petroleum Technology 40, no. 08 (1988): 969–73. http://dx.doi.org/10.2118/18507-pa.

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15

Kong, Fan-Tong, Can Jiang, Yuan-Da Su, and Xiao-Ming Tang. "A multiple filtering and correlation array signal processing technique for cased-hole acoustic logging and applications." Interpretation 8, no. 3 (2020): SL1—SL8. http://dx.doi.org/10.1190/int-2019-0116.1.

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In cased-hole acoustic logging, estimating the formation velocity is often problematic when the casing is poorly bonded with the formation. The overwhelmingly large casing waves dominate the measured waveforms and overlap with the low-coherence, weak formation arrival, contributing to the failure of conventional semblance processing method. To tackle this problem, we have developed a filtered frequency semblance array waveform signal processing technique. The multiple filter technique is first used to filter the measured waveforms. We then apply the [Formula: see text]th root stacking method t

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16

Loginov, Arthur, and Morteza Aminkhaki. "Innovative borehole treatment utilising inflatable packer straddle system technology." APPEA Journal 56, no. 1 (2016): 219. http://dx.doi.org/10.1071/aj15016.

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Open hole fracturing and acid stimulation utilising the traditional cemented liner and hydro jet perforations or mechanical packers with ball-activated frac sleeves have been deployed successfully in the US and Canada for years. One of the primary concerns about the conventional liner methods is assurance of knowing where the fracture or acid is placed. There is no way to determine if there is adequate annular isolation to ensure the planned treatments are placed in the zone of interest. In cased holes, conventional methods to stimulate perforated zones through matrix and fracture acidising wo

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17

Nwala, Stephen Chukwuemeka. "Comparative Studies and Analyses of the Different Mechanical Sand Control Systems: A Case Study of a Well Completed in the Niger- Delta of Nigeria." International Journal for Research in Applied Science and Engineering Technology 11, no. 4 (2023): 463–81. http://dx.doi.org/10.22214/ijraset.2023.49912.

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Abstract: Sand production problems are as old as oil drilling itself. It is argued to be the oldest problem plaguing the oil industry. This phenomenon leads to high economic losses in oil and gas production. If the passive methods of sand control of selective and oriental perforations fail, the active methods which involve the chemical and mechanical methods are called into play. This project work compares four mechanical sand control methods; Cased-Hole Gravel Pack, Wire-Wrapped Screens, Pre-Packed Screens and Slotted Liner. It studies the effectiveness of each system, total skin offered and

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18

Lowry, D. C. "FIGHTING FRACTURED FLAMINGO—LESSONS FROM RAMBLER-I, TIMOR SEA." APPEA Journal 35, no. 1 (1995): 655. http://dx.doi.org/10.1071/aj94040.

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Exploration well Rambler-1, located in the Timor Sea, presented an unusual set of engineering and evaluation problems when drilling a thick section of Flamingo Group (Jurassic–Cretaceous). The well encountered normally pressured open fractures where drilling mud was lost, and at least two mildly overpressured fractures that flowed small quantities of gassy oil into the well-bore. In these circumstances it was difficult to find the right combination of casing, mud density, cement plugs and lost circulation material to drill the well in a controlled and efficient manner.Fine grained sandstone in

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19

А.А., Колеватов, Штейнберг Ю.М., Чен-лен-сон Ю.Б., Егоров А.А., Гиацинтов А.М. та Дяченко А.Г. "Разработка методики определения типа карбонатного нефтенасыщенного коллектора". Труды НИИСИ РАН 8, № 4 (2018): 25–35. http://dx.doi.org/10.25682/niisi.2018.4.0003.

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В статье представлен подход к определению структуры пустотного пространства карбонатного нефтенасыщенного коллектора. Рассматриваются вопросы классификации карбонатного нефтенасыщенного коллектора. Описывается разработка методики определения типа коллектора посред-ством выявления закономерностей в данных гидродинамических исследований, геофизических исследо-ваний скважин в открытом стволе и промыслово-геофизических исследований. Article overviews approach to porous media structure identification of carbonate oil saturated res-ervoir. Carbonate oil saturated reservoir classification aspects als

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20

Mijarez, Rito, David Pascacio, Ricardo Guevara, Carlos Tello, Olimpia Pacheco, and Joaquín Rodríguez. "HPHT cased-hole CCL tool enhancement via DSP techniques for accurate depth control in wire-line well interventions." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2014, HITEC (2014): 000305–10. http://dx.doi.org/10.4071/hitec-tha15.

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Down-hole oil and gas operators require a precise depth control method during well interventions. Wire-line technologies using conventional cased-hole casing collar locator (CCL) tools have been proven effective. However, extremely high pressure and high temperature (HPHT) environments make this a challenging task. This work describes a HPHT down-hole tool that use a conventional inductive CCL enhanced by a DSP based electronic module that performs in real-time DSP techniques such as digital filtering and cross-correlation, which permit to store and transmit analog or digital information to a

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21

Feder, Judy. "Cased-Hole Standalone Evaluation Succeeds in the Absence of Openhole Data." Journal of Petroleum Technology 73, no. 02 (2021): 61–62. http://dx.doi.org/10.2118/0221-0061-jpt.

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This article, written by JPT Technology Editor Judy Feder, contains highlights of paper SPE 202894, “Cased Hole Standalone Evaluation: Breaking the Barrier To Successfully Evaluate Challenging Deep Carbonate Reservoirs,” by Pradeep Menon and Carey Mills, ADNOC, and Suvodip Dasgupta, SPE, Schlumberger, et al., prepared for the 2020 Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, held virtually from 9-12 November. The paper has not been peer reviewed. Accurate petrophysical evaluations (formation lithology, porosity, and water saturation) are essential in characterizing p

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22

Denney, Dennis. "New Cased-Hole Density Porosity for Shaly Sands." Journal of Petroleum Technology 49, no. 11 (1997): 1254–55. http://dx.doi.org/10.2118/1197-1254-jpt.

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23

Varignier, Geoffrey, Valentin Fondement, Cédric Carasco, et al. "Comparison between GEANT4 and MCNP for well logging applications." EPJ Web of Conferences 288 (2023): 01002. http://dx.doi.org/10.1051/epjconf/202328801002.

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MCNP and GEANT4 are two reference Monte Carlo nuclear simulators, MCNP being the standard in the Oil & Gas nuclear logging industry. While performing a simulation benchmark of these two software for the purpose of “Cased Hole” wellbore evaluation, discrepancies between MCNP and GEANT4 were observed: computational experiments were performed first in a theoretical and simplified environment using spherical models, then in a more realistic “Open Hole” wellbore context with simplified logging tools. Results of this comparison show an excellent overall agreement for gamma-gamma physics and an a

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24

Ma, Ben, Hai Qing Li, Xu Deng, and Min Li. "Cross-Section Shape Optimization of Expandable Cased-Hole Liners." Advanced Materials Research 156-157 (October 2010): 1141–45. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.1141.

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Expandable cased-hole liners is to solve the sealing problem of level six multilateral wells. It is a trigeminal expandable tube which is usually prefabricated on the ground and re-expanded when placed in the proper position. In this paper, the trigeminal expandable tubular compression molding process of the pre-forming stage is mainly studied. In this compression process, both sides of the branch pipe should be compressed to a certain shape in order to successfully enter the main borehole; meanwhile, we want to make sure that failures such as rupture do not occur in the subsequent expansion p

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25

Zhang, Kai, Shengqing Li, Yuanda Su, Baohai Tan, and Bo Zhang. "Design of an Acoustic Through-Casing Logging Tool." Sensors 22, no. 21 (2022): 8404. http://dx.doi.org/10.3390/s22218404.

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Well logging is performed in oil and gas exploration wells to obtain the physical characteristics of underground formations. Thereafter, these wells are cased. Through-casing logging is important in mature fields and for wells that are cased without logging due to borehole stability issues. Acoustic through-casing logging is a challenging issue due to the strong interference of casing waves in formation waves, especially when the casing and formation are poorly bonded. An acoustic tool with dual-source transmitters is developed, in which an additional transducer is added to suppress casing wav

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26

Winbow, G. A. "Seismic sources in open and cased boreholes." GEOPHYSICS 56, no. 7 (1991): 1040–50. http://dx.doi.org/10.1190/1.1443112.

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Theoretical modeling, based on the equations of linear elasticity, is used to analyze the performance of downhole seismic sources, specifically, symmetrical radial sources which exert outward pressure on a length of the borehole wall and vertically driven sources clamped to the borehole wall. Torsional sources radiate pure S-waves whose form is independent of the existence of the borehole, and therefore requires no special discussion. The radial sources discussed are airguns, waterguns, and implosive sources. Such sources are in widespread use and development at present. From the calculations

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27

Landrum, W. R., R. C. Burton, W. M. MacKinlay, Aasmund Erlandsen, and Arild Vigen. "Results From the Heidrun Field Cased-Hole Gravel Packs." Journal of Petroleum Technology 48, no. 09 (1996): 848–52. http://dx.doi.org/10.2118/37171-jpt.

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28

Wu, Wensheng, Yaping Fu, and Wei Niu. "Numerical simulation of responses for cased-hole density logging." Journal of Geophysics and Engineering 10, no. 5 (2013): 054006. http://dx.doi.org/10.1088/1742-2132/10/5/054006.

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29

Sun, Lian Zhong, and De Li Gao. "Optimum Placement of Friction Reducer in Extended Reach Well." Applied Mechanics and Materials 101-102 (September 2011): 339–42. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.339.

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There are some problems such as down hole torque & drag, casing wear and so on in extended reach drilling. Therefore, friction reducers are used widely to keep the drillstring away from the cased hole in extended reach drilling. Currently, the optimum placement of friction reducers is dependent on the drillstring deflection. Friction reducers are often connected to drill pipes by tool joints, which limits their optimum placement. In addition, the placement of the first reducer is often determined by drilling engineers’ experience. The effect of friction reducer on torque & drag is asse

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30

Kryzhanivskyy, Ye I., D. G. Chornopyskyy, and І. I. Paliichuk. "Stress Concentration in the Casing when Cutting Holes for the Sidetracks." Prospecting and Development of Oil and Gas Fields, no. 3(72) (September 30, 2019): 7–18. http://dx.doi.org/10.31471/1993-9973-2019-3(72)-7-18.

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Directional drilling of complementary holes in a cased well is an effective method of restoring decommissioned, emergency and abandoned wells. It enables the possibility to save on drilling new oil and gas wells. Today, sidetracking is considered to be the most efficient technology which makes use of milling casing window. Cutting into the column wall is a very important process. The milling cutter makes a slot-like hole in it due to the force response of the wedge deflection device in the casing. The upper part of the hole becomes elliptical with a smooth contour due to the small angle of the

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31

Denney, Dennis. "Perforation-Tunnel Permeability Can Assess Cased-Hole Gravel-Pack Performance." Journal of Petroleum Technology 50, no. 03 (1998): 86–87. http://dx.doi.org/10.2118/0398-0086-jpt.

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32

Carpenter, Chris. "Testing and Evaluation Method Investigates Cement Expansion in Cased-Hole Wells." Journal of Petroleum Technology 74, no. 05 (2022): 96–98. http://dx.doi.org/10.2118/0522-0096-jpt.

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Анотація:

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 208679, “Cement Expansion in Cased-Hole Environments: A Novel Laboratory Testing and Evaluation Method With Successful Field Implementation,” by Vasilii Sukhachev, Amir Salehpour, SPE, and Ilshat Akhmetzianov, SPE, Schlumberger, et al. The paper has not been peer reviewed. Preventing bulk shrinkage of cement in cased-hole wells is important when dealing with the risk of sustained casing pressure (SCP). Current studies based on membrane tests suggest that, even with a high-percentage content of expa

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33

Roostaei, Morteza, Mohammad Soroush, Farshad Mohammadtabar, et al. "Design for Reliability: Experimental and Numerical Simulation of Cased and Perforated Completions with Standalone Screen." SPE Drilling & Completion 36, no. 03 (2021): 680–706. http://dx.doi.org/10.2118/201315-pa.

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Summary The historical challenges and high failure rate of using standalone screen in cased and perforated wellbores pushed several operators to consider cased-hole gravel packing or frac packing as the preferred completion. Despite the reliability of these options, they are more expensive than a standalone screen completion. In this paper, we employ a combined physical laboratory testing and computational fluid dynamics (CFD) for laboratory scale and field scale to assess the potential use of the standalone screen in completing the cased and perforated wells. The aim is to design a fit-to-pur

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34

Carpenter, Chris. "Intermediate String Design Enhances Intelligent Deepwater Completions." Journal of Petroleum Technology 75, no. 05 (2023): 71–73. http://dx.doi.org/10.2118/0523-0071-jpt.

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_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper IPTC 22087, “One Innovative Intelligent Completion Intermediate String Design for Deepwater Gas-Well Completions: The Installation Case Study From L Gas Field, China,” by Shu Jie Liu, Yi Huang, and Wen Bo Meng, CNOOC, et al. The paper has not been peer reviewed. Copyright 2022 International Petroleum Technology Conference. Reproduced by permission. _ An intelligent completion design was installed in two wells in China’s L field deepwater project. Both wells have dual-zone stack-pack sand-control lowe

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35

Eko, Eko Prastio. "APLIKASI ALAT PULSE NEUTRON LOGGING UNTUK MENENTUKAN ZONA HIDROKARBON BARU DI LAPANGAN X." Jurnal Jaring SainTek 2, no. 2 (2020): 42–50. http://dx.doi.org/10.31599/jaring-saintek.v2i2.318.

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Pengukuran Neutron Porosity pada sumur terbuka (Open Hole) ditujukan untuk mengukur indeks hidrogen yang terdapat pada formasi batuan. Indeks hidrogen didefinsikan sebagai rasio dari konsentrasi atom hidrogen setiap cm3 batuan terhadap kandungan air murni pada suhu 75oF. Neutron Porosity log tidaklah mengukur porositas sesungguhnya dari batuan, melainkan yang diukur adalah kandungan hidrogen yang terdapat pada pori-pori batuan. Secara sederhana, semakin berpori batuan semakin banyak kandungan hidrogen dan semakin tinggi indeks hidrogen. Sehingga, shale yang banyak mengandung hidrogen dap

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Chen, S. T., and E. A. Eriksen. "Compressional and shear‐wave logging in open and cased holes using a multipole tool." GEOPHYSICS 56, no. 4 (1991): 550–57. http://dx.doi.org/10.1190/1.1443072.

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We have found in field observations that the multipole sonic logging tool can effectively measure formation P‐wave and S‐wave data in a cased hole. The multipole tool, containing both monopole and quadrupole source‐receiver systems, was originally designed to log P‐ and S‐waves directly, in all lithologies, for an open borehole. The monopole source‐receiver system (P‐wave) operates at 7–10 kHz, as compared with 15–25 kHz for a conventional sonic tool, while the quadrupole source‐receiver system (S‐wave) operates at 3–7 kHz. These lower operating frequencies enable the signals to penetrate the

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Burton, R. C. "Use of Perforation-Tunnel Permeability To Assess Cased Hole Gravelpack Performance." SPE Drilling & Completion 14, no. 04 (1999): 235–39. http://dx.doi.org/10.2118/59558-pa.

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Zhang, Qiong, Yulian Li, Ya Jin, et al. "A new gamma density measurement method for cased-hole formation evaluation." Applied Radiation and Isotopes 184 (June 2022): 110178. http://dx.doi.org/10.1016/j.apradiso.2022.110178.

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Wu, Wensheng, and Yuling Zhang. "Thin bed responses and correction methods for cased hole density logging." Petroleum Science 5, no. 4 (2008): 322–25. http://dx.doi.org/10.1007/s12182-008-0054-9.

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SONG, Ruo-Long, Jin-Xia LIU, Gui-Jin YAO, Jun MA, and Ke-Xie WANG. "Parallel Finite Difference Modeling of Acoustic Fields in Nonaxisymmetric Cased Hole." Chinese Journal of Geophysics 53, no. 6 (2010): 1029–38. http://dx.doi.org/10.1002/cjg2.1573.

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Zhang, Peng, Javid Shiriyev, Mrinal K. Sen, and Mukul M. Sharma. "Inversion of downhole electrical measurements for proppant mapping using very fast simulated annealing." GEOPHYSICS 85, no. 1 (2020): D13—D22. http://dx.doi.org/10.1190/geo2018-0749.1.

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Proppant mapping is critical for optimizing fracture treatment design and improving wells’ productivity. An electrode-based resistivity tool concept was developed earlier for proppant mapping in cased-hole wells. An array of insulating gaps is installed and cemented in place as a permanent part of the casing string. The electrical measurements are performed by imposing a voltage across each insulating gap, one at a time, before and after hydraulic fracture operations. The voltages across other insulating gaps near the transmitter gap are recorded. The method relies on direct excitation of the

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Li, Guo Liang, Hong Xue Mi, Xiao Zeng Wang, Yang Yu, and Yi Hua Dou. "Study of Resistance to Wear of P110 Casing Down-Hole in Water Based Mud." Applied Mechanics and Materials 687-691 (November 2014): 224–27. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.224.

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The operation of drilling well leads to casing wear to some degree in cased well. The reduced strength of worn casing threats to the safety of well test and completion. In order to calculate casing wear depth and prevent the casing wear, the wear efficiency and friction coefficient is measured in the different wear time, the contact force and the rotating speed. The wear efficiency increases with the contact force and the rotating speed. And the bigger the rotating speed, the bigger the friction coefficient. The wear efficiency of P110 casing is change from 2 to 8×10-13 1/Pa. The rotating spee

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43

Mimoun, Jordan G., Carlos Torres-Verdín, and William E. Preeg. "Quantitative interpretation of pulsed neutron capture logs: Part 2 — Inversion of measurements in thinly bedded formations." GEOPHYSICS 76, no. 3 (2011): E95—E103. http://dx.doi.org/10.1190/1.3569111.

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We have developed an inversion method to reduce shoulder-bed effects on pulsed neutron capture (PNC) logs for estimating layer-by-layer-capture cross sections Σ. The method is based on a previously developed rapid approximation of PNC logs. Tests performed on synthetic examples that include a variety of lithology, saturating-fluid, and bed-thickness configurations confirm the efficiency, reliability, and stability of the inversion procedure. Inversion consistently improves the vertical resolution and Σ definition of PNC logs across beds thinner than 45 cm. Our fast, iterative algorithm inverts

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Jacobson, Larry, Venkataraman Jambunathan, Zhipeng Liu, and Weijun Guo. "Technical advances in pulsed-neutron interpretation for cased-hole logging: Physics, interpretation, and log examples." Interpretation 3, no. 1 (2015): SA159—SA166. http://dx.doi.org/10.1190/int-2014-0174.1.

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Recently developed multidetector pulsed-neutron tools (MDPNTs — a term describing a pulsed-neutron tool with at least three detectors) can provide three-phase formation fluid analysis in cased wells. These tools are 43 mm (1 11/16 in.) or 54 mm (2 1/8 in.) in diameter and can be logged in or below most tubing sizes. We reviewed traditional oil- and water-saturation techniques as well as indirect gas-saturation techniques, and we compared them with recently developed direct gas-saturation techniques, now available from MDPNTs. A log example developed the data verification and interpretation pro

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Ayodele, Irewole, Chiara Cavalleri, Adeleke Orimolade, and Babafemi Falaye. "Advances in Elemental Spectroscopy Logging: A Cased Hole Application Offshore West Africa." Journal of Geography and Geology 9, no. 4 (2017): 63. http://dx.doi.org/10.5539/jgg.v9n4p63.

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Rising costs for exploration and developments and more stringent need to secure any additional drop of oil have put operators’ margins under increasing pressure. Coupled with the recent oil price decline, this call for efficiency and diligence to be the main drivers for any formation evaluation and planning for development and production. The reservoirs in Western offshore Africa are so diverse in the settings that two reservoirs hardly show any correlation. The complexity associated with the Rifting of African plate from South American plate has introduced significant geological challenges, a

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Grover, Rahul. "Technology Update: Tool Enables Complete Cased-Hole Formation Evaluation, Reservoir Saturation Modeling." Journal of Petroleum Technology 69, no. 10 (2017): 18–20. http://dx.doi.org/10.2118/1017-0018-jpt.

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Zhang, Kunpeng, and Mian Chen. "Stress distribution of cased elliptical hole with high fluid pressure: Analytical expression." Journal of Petroleum Science and Engineering 208 (January 2022): 109437. http://dx.doi.org/10.1016/j.petrol.2021.109437.

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Li, Ming, Rui Deng, Juan Cao, et al. "Research on remaining oil evaluation method based on cased hole logging technology." Energy Reports 7 (November 2021): 1168–74. http://dx.doi.org/10.1016/j.egyr.2021.09.149.

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Alexander, Karen, Suzanne Winton, and Colin Price-Smith. "Alba Field Cased-Hole Horizontal Gravel Pack: A Team Approach to Design." SPE Drilling & Completion 11, no. 01 (1996): 31–36. http://dx.doi.org/10.2118/30941-pa.

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Aflyatunov, R. R., V. G. Bazarevskaya, A. F. Safarov, et al. "Oil Potential of Sargaevskian Horizon in Romashkinskoe Field Areas." Georesources 27, no. 2 (2025): 255–63. https://doi.org/10.18599/grs.2025.2.19.

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High extent of subsurface exploration activities in the Republic of Tatarstan results in ever increasing scarcity of hydrocarbon resources available for the purposes of oil production. Under such conditions, the search for and development of overlooked reservoirs within existing producing fields become of great importance. The Sargaevskian horizon is associated with unique Domanic deposits which are considered the main oil source rocks within the Volga-Ural petroleum province. Domanic rocks are capable of both generating and accumulating hydrocarbons. This paper analyses all available G&G

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