Study on permeability law of water-based polymer drilling fluid containing CaCl2 in wellbore formation by Tianle Liu, Qi Quan, Guosheng Jiang, Shaojun Zheng, Lixia Li, Yinfei Yu

“…The use of microbially induced carbonate precipitation (MICP) technology to improve the cementation quality of oil and gas well cementing has attracted more and more attention in recent years. …”
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Water Invasion Law and Water Invasion Risk Identification Method for Deep Sea Bottom-Water Gas Reservoir by Jiqiang Zhi, Lifeng Bo, Guohui Qu, Nan Jiang, Rongzhou Zhang

“…The results show that: (1) During the development of a bottom-water gas reservoir, the water ridging is affected by reservoir heterogeneity, production system and heel–toe effect of a horizontal wellbore, and reservoir heterogeneity is the main influencing factor; (2) the horizontal–vertical ratio of the well area determines whether the gas well productivity will be affected by the risk of water invasion. …”
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An overview of the characteristic of typical Wufeng–Longmaxi shale gas fields in the Sichuan Basin, China by Haikuan Nie, Qian Chen, Guangrong Zhang, Chuanxiang Sun, Pengwei Wang, Zhiyuan Lu

“…Furthermore, the horizontal well trajectory in the WF2–LM4 graptolite zone determines the shale gas well test production and EUR. The results of this work will provide a reference for shale gas exploration and development of the Wufeng Formation–Longmaxi Formation in the Sichuan Basin, as well as the Silurian strata in other parts of the world.…”
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Design and test of a cuttings bed remover for horizontal wells by Guodong Ji, Haige Wang, Hongchun Huang, Zhao Meng, Liu Cui, Weihong Guo

“…Cuttings accumulation in horizontal drilling of a shale gas well is one of the main reasons for high drilling torque and drag and serious backing pressure and consequently influencing the rate of penetration (ROP), so inhibiting the generation of a cuttings bed and keeping the hole clean is an important prerequisite to ensure the smooth and safe drilling of horizontal section. …”
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Optimization of shale-gas horizontal well spacing based on geology–engineering–economy integration: A case study of Well Block Ning 209 in the National Shale Gas Development Demons... by Rui Yong, Cheng Chang, Deliang Zhang, Jianfa Wu, Haoyong Huang, Daijiao Jing, Jian Zheng

“…In order to maximize the resource utilization rate, it is common to adopt one-time overall deployment of well pattern to develop shale gas, and the design of horizontal well spacing is the key to the deployment of shale gas well pattern. To determine the optimal well spacing, it is not only necessary to understand both geological characteristics and drilling fracturing technology, but also take into consideration the influences of economic factors, such as gas price and cost. …”
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Stimulation technologies for Longwangmiao Fm gas reservoirs in the Sichuan Basin and their application results by Fu Yongqiang, He Ye, Wang Yezhong, Yang Jinli, Sang Yu, Han Huifen

“…The thickness of such high permeable reservoirs with great homogeneity is a geologic basis for a high-productivity gas well, and good match of natural fractures and vugs is the key factor to high well productivity. …”
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Shale Poroelastic Effects on Well Performance Analysis of Shale Gas Reservoirs by Ebrahim Fathi, Fatemeh Belyadi, Bahiya Jabbar

“…For this purpose, rock and fluid properties were obtained using actual well logging and core analysis of the Marcellus gas well. The results showed the importance of the poroelastic effect on the pressure response and rate of gas recovery from the shale matrix. …”
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Spatial–Temporal Land Loss Modeling and Simulation in a Vulnerable Coast: A Case Study in Coastal Louisiana by Mingzheng Yang, Lei Zou, Heng Cai, Yi Qiang, Binbin Lin, Bing Zhou, Joynal Abedin, Debayan Mandal

“…The results indicate that land loss patterns in different parts change through time at an overall decelerating speed. The oil and gas well density and subsidence rate were the most significant land loss drivers during 2001–2016. …”
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Adaptability analysis and optimization of log suite for uncased wellbores of shale gas reservoirs: A case study of Sichuan Basin, China by Benke Shen, Ning Xia, Jun Li, Jing Lu, Song Hu, Xiang Ge, Zhiyuan Liu, Kun Liu, Qiangfu Kong

“…Despite the rich experience accumulated, unified understanding and implementation specifications are yet to be established for shale gas well logging. Given the analysis and comparison of the effectiveness and adaptability of logging technologies at different stages of shale gas exploration and development for the Sichuan Basin, this study optimizes the log suite to meet the demand for high-efficiency exploration and development of shale gas. …”
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Practice and understanding of fracturing in Weirong shale gas field by Yonghua YANG, Yangao SONG, Xingwen WANG, Lin LIU, Jianfa CI, Lishi LIN

“…The specific performance result is the low single well EUR after gas well fracturing. Through unremitting exploration and practice, the fracturing technology has been continuously improved in the process of discovering and solving problems, and a series of measures of "fine optimization, real-time warning, operating pace control, and W-shaped well network" for preventing casing deformation and increasing post fracturing output has been formed based on the concept of balanced fracturing. …”
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Innovation and practice of key technologies for the efficient development of the supergiant Anyue Gas Field by Jun Xie

“…Based on this, the safety of gas wells is under control in the whole life cycle, quality engineering is built up efficiently within 3 years, green mining areas are forged and large-scale safe and clean gas fields are built up efficiently. …”
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Lesson learned from the assessment of planned converted CO2 injection well integrity in Indonesia – CCUS project by B.T.H. Marbun, S.Z. Sinaga, B. Purbantanu, D. Santoso, W.G.A. Kadir, R. Sule, D.E. Prasetyo, H. Prabowo, D. Susilo, F.R. Firmansyah, J.M. Palilu, W. Saprudin, B. Andhika

“…However, these standards alone were inadequate to evaluate the well integrity due to the need to specify criteria, duration of measurement, and range of measurement parameters of the available tools according to industries’ best practices.The methodology used in the study adapted applicable and readily-available international standards, field experiences, and lessons learned that could be used to support the construction of new and/or the conversion of existing oil and gas wells into CO2 injection wells. This study focused on Jepon-1 in Gundih field, Indonesia, an abandoned oil and gas well. …”
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Lithofacies types, reservoir characteristics and silica origin of marine shales: A case study of the Wufeng formation–Longmaxi Formation in the Luzhou area, southern Sichuan Basin... by Shuyan Wang, Ling Man, Shiqian Wang, Lei Wu, Yiqing Zhu, Yi Li, Yifan He

“…Therefore, classification of the lithofacies types of shale, analysis of the reservoir differences of different lithofacies, and identification of the superior shale lithofacies with the best RQ and CQ are important for decisions on well placement, targeting the “sweet spot” zone and optimizing the expected ultimate recovery of a shale gas well. In this study, several methods including microscopic observation of thin sections, X-ray diffraction analysis, core analysis and elemental geochemistry were used to investigate the lithofacies types, reservoir characteristics and silica origin of the marine shales of the Wufeng Formation–Longmaxi Formation (WF Fm.…”
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Water-gas ratio characteristics and development concepts for water-producing gas reservoirs by Shusheng Gao, Jianzhong Zhang, Huaxun Liu, Liyou Ye, Wenqing Zhu, Wei Xiong

“…Water production from gas wells is a key factor affecting the effectiveness of gas-reservoir development, and it poses serious challenges in terms of increasing the degree of recovery during the waterless production stage and reducing the impact of water production on gas-reservoir development in the middle and later periods. …”
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Population‐level monitoring of stress in grizzly bears between 2004 and 2014 by Abbey E. Wilson, Sean Kearney, Dan Wismer, Bryan Macbeth, Gordon Stenhouse, Nicholas C. Coops, David M. Janz

“…Anthropogenic variables had the greatest impact on HCC; increasing oil and gas well‐site density resulted in reduced HCC, while increasing distance to coal mines resulted in elevated HCC. …”
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Model of cross-flow interference index and application for multi-layer commingled production in Sulige tight sandstone gas reservoir, Ordos Basin, China by Huaxun Liu, Shusheng Gao, Feifei Fang, Chunyan Jiao, Qi Li, Liyou Ye, Weiguo An, Jie Zhang

“…Multi-layer commingled production is the main feature of gas well development in Sulige tight sandstone gas reservoir, Ordos Basin. …”
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Influence of reservoir primary water on shale gas occurrence and flow capacity by Zhiming Hu, Xianggang Duan, Yabin He, Jianfa Wu, Jin Chang, Li Liu, Kang Wu, Zhenyong Ma

“…It is concluded that an accurate understanding of the original water saturation and critical water saturation of shale reservoirs helps to calculate shale gas reserves accurately and predict gas well production rate rationally. Keywords: Shale gas, Reservoir, Water saturation, Isothermal adsorption, State of occurrence, Flow capacity, Reserves, Gas production rate…”
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Carbon isotope evidence for shale gas preservation conditions and large methane release over million years: A case study of shale gas reservoirs of Wufeng and Longmaxi Formations i... by Haikuan Nie, Chuanxiang Sun, Pei Li, Zhijun Jin, Quanyou Liu, Hanyong Bao, Baojian Shen, Wei Dang

“…A study on high-maturity shale from Wufeng and Longmaxi Formations in the Sichuan Basin not only reveals the relationship between the degree of isotopes inversion and the production capacity (e.g., estimated ultimate recovery (EUR)) of the gas well but also indicates the preservation conditions of shale gas reservoirs. (1) Although there are differences in gas isotopes in different shale gas reservoirs, the isotope fractionation of shale gas is small during the production stage of gas wells, even when the wellbore pressure drops to zero. …”
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Experimental study on scaling and adhesion characteristics in water-producing gas wellbore by Liang Zhang, Linchao Yang, Zhiyuan Wang, Chong Zhang, Wenbo Meng, Shaoran Ren

“…A water-producing gas well in deep water encounters problems of high cost and substantial operational difficulties in scale prevention and descaling. …”
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Reservoir Characterization of a Tight Gas Field Using New Modified Type Curves for Production Data Analysis—A Case Study from Ordos Basin by Chang Su, Kefeng Lu, Wanju Yuan, Gang Zhao

“…Using data from 56 tight gas wells from the study field (Y field) in the Ordos basin of China, this paper presents performance-based reservoir characterization of the study field from production data and geophysical data. …”
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