Results 61 to 70 of about 17,726 (239)

The disaster law and control measures of high-stress tunnels in fault areas: a case study

Scientific Reports
In recent years, the frequent occurrence of dynamic disasters in tunnels with high stress in fault areas has greatly threatened engineering safety. The typical case – a tunnel influenced by fault slip on is taken as a research object.
Wenjie Li, Mingwei Yao, Zhengkai Liao, Jinbiao Wu, Nenghui Ma, Jingyi Su, Chenchuan Mei, Wenzhe Wang   +7 more
doaj   +1 more source

Development and Application of Dual-Tubing Jet Pump Full-Process Pressure-Maintained Drainage String in Deep Coal-Rock Gas Wells

Shiyou jixie
Deep coal-rock gas reservoir is sensitive to downhole pressure variation， and implementing kill operation may cause damage to gas production. Consequently， a full-process pressure-maintained operation technique of dual-tubing jet pump for deep coal-rock ...
Wu Jianjun, Wang Yubin, Ma Wentao, Liu Yinhua, Yin Decai, Ma Zhao, Yan Yongwei   +6 more
doaj   +1 more source

Pilot test of a fermentation tank for producing coal methane through anaerobic fermentation [PDF]

, 2017
The development and utilization of clean energy has long been a focus of research. In the coal bed methane field, most coal bed biogenic methane experiments are small static sample tests in which the initial conditions are set and the process cannot be ...
Fu, Chaoyong, Liu, Xile, Su, Xianbo, Xia, Daping, Zhang, Huaiwen   +4 more
core   +1 more source

Uncertainty Analysis Method for Rib Force Vector Control of Coiled Tubing Drilling Orientor

Shiyou jixie
In the process of coiled tubing （CT） directional drilling， the downhole parameters have some uncertainties. To more accurately control the wellbore trajectory to advance along the planned course， an uncertainty analysis method for rib force vector ...
Wang Wei, Zhuo Ran, Miao Qiang, Wu Jianjun, Li Shichao, Chen Gang, Li Meng   +6 more
doaj   +1 more source

Gas drainage and utilization in coal mines in China: History, technological advances, and prospects

Meitian dizhi yu kantan
Objective and Methods To promote the research and application of gas drainage and utilization technologies for coal mines, this study systematically summarizes the history of China’s coal mines transitioning from gas pumping to gas drainage, the accurate
Guofu LI, Chao LI, Bichuan ZHANG, Yun XU, Zheng WANG, Xianjun ZHOU   +5 more
doaj   +1 more source

Application of five seismic attributes in natural fracture prediction for deep coalbed methane production along the eastern margin of the Ordos Basin

Meitian dizhi yu kantan
BackgroundNatural fractures serve as both the primary storage space for free gas of deep coalbed methane (CBM) and pathways for hydrocarbon migration. Furthermore, these fractures can enhance the porosity and permeability of strata under the deep, high ...
Jiangnan TONG, Feng WANG, Feng ZHANG, Wei HOU, Zhongbai LI, Liang JI, Yanan JIANG, Wei SUN   +7 more
doaj   +1 more source

Key experimental technologies and their development directions for the exploration and production of deep coalbed methane

Meitian dizhi yu kantan
ObjectiveDeep coalbed methane (CBM) production enjoys advantages including rapid gas shows, high single-well yield, and continuous resource distribution, which establish deep CBM as a significant target for reserve growth and production addition of ...
Xia YAN, Fengyin XU, Xianyue XIONG, Feng WANG, Chunhu LI, Jiyuan ZHANG, Borui XU, Qianhui CHENG, Xiong HU, Xueguang ZHU, Wei LIANG, Pu YUAN, Yanqing FENG, Zhenji WEI   +13 more
doaj   +1 more source

Estudio de las propiedades de adsorción/desorción de gas en el carbón de la Cuenca de Sabinas en México: Study of gas adsorption/desorption properties in coals of Sabinas Basin on Mexico [PDF]

, 2015
http://sherpa.ac.uk/romeo/issn/2007-9753/El objetivo principal de esta investigación, se enfoca en el estudio de las propiedades de adsorción/desorción de CH4 en los yacimientos de gas asociado al carbón, los cuales se ubican en la porción noreste de ...
Camacho-Ortegón, L. F., De la O-Burrola, F., Dinis, Maria Alzira Pimenta, Enciso-Cárdenas, J. J., Lemos de Sousa, M. J., Martínez, L., Rodrigues, Cristina   +6 more
core  

Sequence division and coal facies research methods of the deep No. 8 coal seam in the Daning-Jixian Block, eastern margin of Ordos basin

Scientific Reports
With the large-scale commercial development of deep coalbed methane in the Ordos Basin, the refined research on deep coal seams (with a burial depth > 2000 m) has begun to attract much attention. In this study, the No.
Jintao Kong, Xianyue Xiong, Rong Ding
doaj   +1 more source

Publisher's Note: “A non-Darcy gas flow model for coalbed methane in mine gobs” [Phys. Fluids 33, 116601 (2021)] [PDF]

, 2021
Yiwei Ren, Qiang Yuan, Deyi Jiang, Jinyang Fan, Wenhao Liu, Like Wei, Zhen Wang   +6 more
openalex   +1 more source