Results 51 to 60 of about 5,928 (182)

Challenges and development direction of deep fragmented soft coalbed methane in China

Earth Energy Science
Developing deep fragmented soft coalbed methane (CBM) can significantly enhance domestic natural gas supplies, reduce reliance on imported energy, and bolster national energy security.
Yiyu Lu, Guilin Zhao, Zhaolong Ge, Yunzhong Jia, Jiren Tang, Tianyi Gong, Shan Huang, Zhongtan Li, Wenyu Fu, Jianyu Mi   +9 more
doaj   +1 more source

Multi-Field Coupling Models of Coal and Gas and Their Engineering Applications to CBM in Deep Seams: A Review

Energies
In the process of deep coal seam mining, the problem of coal–gas compound disasters is increasingly prominent, with the safe and efficient extraction of gas serving as the key to disaster reduction. A deep coal seam gas extraction project is a complex coupled system involving multiple physical fields, such as stress fields, gas flow fields, and energy.
Xingying Ma, Aitao Zhou, Xiaoyu Cheng, Cheng Cheng, Wei Zhao   +4 more
openaire   +2 more sources

Deep reinforcement learning for condition-based maintenance planning of multi-component systems under dependent competing risks

, 2020
Click on the DOI link to access the article (may not be free).Condition-Based Maintenance (CBM) planning for multi-component systems has been receiving increasing attention in recent years.
Zhang, Nailong, Si, Wujun
core   +1 more source

Geological steering technology for directional drilling of deep CBM horizontal wells in Qinshui Basin

Meikuang Anquan, 2023
The geological structure of the deep coal seam in Qinshui Basin is relatively complex, which poses a new challenge to the control of the directional landing site of the horizontal well and the control of the drilling trajectory of the horizontal section, and the traditional methods based on the geological characteristics data and lithology of the ...
openaire   +1 more source

Factors influencing productivity and production system optimization for deep coalbed methane in the Daning-Jixian block, Ordos Basin

Meitian dizhi yu kantan
ObjectiveDeep coalbed methane (CBM) reservoirs are characterized by ultra-low porosity, ultra-low permeability, and super saturation, rendering it impractical to copy the productivity models of shallow coalbed methane and shale gas.
Haifeng ZHAO, Zhaojie JIA, Mengqi CHEN, Ziyi YANG, Bin WANG, Hongliang LIN, Yanfeng YANG   +6 more
doaj   +1 more source

Prediction of geological and engineering integrated sweet spots of deep coalbed methane

Meitian dizhi yu kantan
ObjectiveDeep coalbed methane (CBM) has emerged as a hot topic in CBM resource development. However, deep CBM has characteristics such as great burial depths, complex stress environments, and strong reservoir heterogeneity, which seriously restrict sweet
Zhengrong CHEN, Wei LIU, Xueshen ZHU, Yongjing TIAN, Xin XIE   +4 more
doaj   +1 more source

Characteristics of deep Jurassic coalbed methane reservoir and its pore-fracture structure in Junggar Basin

Meitan kexue jishu
The physical properties of coal reservoirs are crucial for evaluating deep coalbed methane (CBM) potential. The Jurassic Xishanyao and Badaowan formations in the Junggar Basin are key CBM targets, characterized by thick, stable, and widely distributed ...
Julei MI, Jun JIN, Baoli XIANG, Zhaobiao YANG, Haifeng BAI, Ni ZHOU, Yuqiang WANG, Yu ZHANG, Jianan WANG   +8 more
doaj   +1 more source

Simulation of Deep Coalbed Methane Permeability and Production Assuming Variable Pore Volume Compressibility

, 2010
One of the horizons of interest for future unconventional resource development is deep (greate than ~5,000 ft) coalbed methane (CBM) production. Unfortunately, coal permeability is highly sensitive to changes in stress leading to the belief of limited ...
R. R. Tonnsen, J. L. Miskimins
core   +1 more source

Proposed measures for deep coalbed methane exploration and production practices and high-quality development in China

Shiyou shiyan dizhi
Coalbed methane (CBM), as an important supplement to natural gas supply, is of great significance for ensuring national energy security and promoting a low-carbon transition in the energy structure.
Hong CHEN, Chenshuo ZHANG, Xinjun CHEN, Daoyong ZHANG, Chen ZHANG   +4 more
doaj   +1 more source

Simulation of Deep-Coalbed-Methane Permeability and Production Assuming Variable Pore-Volume Compressibility

, 2011
Summary One of the horizons of interest for future unconventional-resource development is deep- (> 5,000 ft) coalbed-methane (CBM) production. Unfortunately, coal permeability is highly sensitive to changes in stress, leading to the
Jennifer Miskimins, Robert R. Tonnsen
core   +1 more source