Results 61 to 70 of about 16,144,632 (222)

The Optimization of Well Spacing in a Coalbed Methane Reservoir [PDF]

, 2010
Numerical reservoir simulation has been used to describe mechanism of methane gas desorption process, diffusion process, and fluid flow in a coalbed methane reservoir.
Sinurat, Pahala Dominicus
core  

A novel construction approach for the pore structure model principally focuses on the controllable roundness of rock particles

Deep Underground Science and Engineering, Volume 5, Issue 1, Page 207-219, March 2026.
Particle rounding effects comparison of different methods: (a), (b), and (c) are the rounding results using the B‐spline curve method with different R; (d), (e), and (f) are the results of vertex rounding substitution method with different rounding radii.
Jiabin Dong, Ning Yang, Yi Jin, Ying Wu, Dandan Liu, Junling Zheng, Jingyan Zhao   +6 more
wiley   +1 more source

Mechanism of fracturing geological characteristics controlling gas well productivity in medium-rank coalbed methane reservoirs

Meitan kexue jishu
Medium-rank coalbed methane is the core target for deep coalbed methane exploration and development in China. Conducting research on the influence laws and control mechanisms of fracturing geological characteristics of coal reservoirs at this metamorphic
Lichao CHEN, Daibing MA, Shibing LI, Wentao MA, Xingxing GUO, Jingdan LIU, Yanwu CHEN, Xi ZHAO   +7 more
doaj   +1 more source

Characterization of the permeability evolution of hard and soft rocks under hydro‐mechanical coupling conditions

Deep Underground Science and Engineering, Volume 5, Issue 1, Page 220-232, March 2026.
The permeability variation of rocks during complete stress–strain processes was investigated. A mathematical model describing the influence of rock damage on permeability was constructed. The permeability–stress relationship between soft rock and hard rock was proposed.
Zhen Huang, Jian Yu, Yun Wu, Cong Gong, Xiaozhao Li, Kui Zhao, Dickson Moyo   +6 more
wiley   +1 more source

Study on the Law of Multi‐Fracture Propagation in Different Fracturing Fluid Viscosity

Energy Science &Engineering, Volume 14, Issue 3, Page 1339-1352, March 2026.
Samples and equipment Sample preparation Test equipment Analysis of test results Fracture propagation morphology Influence of fracturing fluid viscosity on crack initiation time/(fracture initiation pressure) Evolution law of injection pressure Cumulative relation curve of pressure–time–acoustic ABSTRACT Using the TCHFSM‐I large‐scale accurate triaxial
Zhixing Zhang, Xiang Fu, Yuedong Liu, Xiaoqiang Zhang, Yulong Jiang   +4 more
wiley   +1 more source

Current situation and prospects of coalbed methane exploration and development in Sichuan Basin [PDF]

Youqicang pingjia yu kaifa
The Sichuan Basin is abundant in coal resources and has achieved breakthroughs in coalbed methane exploration wells in recent years. To explore the feasibility of establishing a coalbed methane production base in the Sichuan Basin, this study reviews the
ZHU Suyang, LIU Wei, WANG Yunfeng, JIA Chunsheng, CHEN Chaogang, PENG Xiaolong
doaj   +3 more sources

Study on the Influence of Complicated Geological Condition Permeability in Coal Reservoirs on Horizontal Well Drainage and Production

Energy Science & Engineering
Based on the engineering background of coalbed methane block in Liujia District of Fuxin with complex geological conditions, a seepage mathematical model considering the dynamic changes of porosity and permeability of coal reservoir caused by coal matrix
Bing Qin, Qifu Wei, Wenjing Duan, Zhanshan Shi, Jianfeng Hao, Bing Liang, Weiji Sun   +6 more
doaj   +1 more source

Tight Gas Evaluation Method Based on Fast Neutron Cross Section and Its Applications

Cejing jishu
The tight sandstone gas reservoir in a certain area of Shanxi Province is characterized by low porosity and low permeability. The relationship between pore structure, resistivity and gas and water is complex. The reservoir characteristics pose challenges
JIE Zhijun, MA Xiaojing, CAI Wenzhe, LIU Shiwei, SHI Yao, QIU Fei, LYU Liming, LIANG Guowu   +7 more
doaj   +1 more source

Analysis of key factors and prediction of gas production pressure of coalbed methane well: Combining grey relational with principal component regression analysis

Energy Exploration & Exploitation, 2019
The critical desorption pressure is different from the gas production pressure of coalbed methane. Gas production pressure is affected by many factors, but their relationships are not obvious. Therefore, it is difficult to predict gas production pressure
Caifang Wu, Xiaolei Liu, Qizhong Zhou, Xiaoyang Zhang   +3 more
doaj   +1 more source

Research on the Mechanism of Sand Bridge Stuck Drill in Deep Coal and Rock Gas Horizontal Wells

Energy Science &Engineering, Volume 14, Issue 2, Page 854-865, February 2026.
Accounting for wellbore collapse debris and the bulldozer effect, this study develops models for permeable and impermeable sand bridge sticking in deep CBM horizontal wells, deriving resistance and volume formulations. Validated in Changqing, results show impermeable bridges dominate; controls (fluid optimization, staged drilling, circulation, speed ...
Cheng Hui, Yong Ouyang, Zhifeng Duan, Xiaoyue Xu, Yuxiang Teng, Mingyang Liu, Hui Zhang, Long Chen   +7 more
wiley   +1 more source