Results 41 to 50 of about 3,623 (118)

Documented international enquiry on solid sedimentary fossil fuels; Coal: definitions, classifications, reserves-resources and energy potential [PDF]

, 2002
This paper deals with all solid sedimentary fossil fuels, i.e. coal, the main one for geological reserves and resources, peat, and oil shales. Definitions of coal ( < 50% ash) and coal seam (thickness and depth limits) are examined in view of an ...
Alpern, B., Lemos de Sousa, M. J.
core   +1 more source

Study on the Influence of Deep Coalbed Methane Horizontal Well Deployment Orientation on Production

Energies
The development of deep coalbed methane has become an important way to obtain natural gas in China. The development of deep CBM mainly depends on horizontal well technology. The different orientations of horizontal wells will have an important impact on the productivity of coalbed methane wells.
Ruyong Feng, Chen Li, Lichun Sun, Jian Wang, Jia Liu, Na Li   +5 more
openaire   +2 more sources

Experimental Study on the Mechanical Damage and Permeability Evolution of Coal With Different Moisture Contents Under Supercritical Carbon Dioxide Conditions

Energy Science &Engineering, Volume 13, Issue 5, Page 2375-2388, May 2025.
ABSTRACT Using a self‐developed supercritical carbon dioxide (CO2) soaking system, the damage mechanisms and cracking characteristics of coal due to supercritical CO2 under the coupling of high‐temperature, high‐pressure, water, and the seepage evolution law and failure mode of coal bodies were revealed.
Xiaoqiang Zhang, Kai Wang, Yulong Jiang, Yuedong Liu, Pengqi Qiu, Shiyu Zhang, Tingting Cai, Jian Hou   +7 more
wiley   +1 more source

Investigation into the variation characteristics and influencing factors of coalbed methane gas content in deep coal seams

Scientific Reports
AbstractGas saturation is a critical parameter for the selection and development of coalbed methane, as well as a key indicator reflecting the challenges in coalbed methane development and productivity evaluation of coalbed methane wells. As one of the significant factors influencing gas saturation, gas content plays a vital role in comprehensively ...
Qianya Zhu, Xuejia Du, Tong Zhang, Haiming Yu, Xiaobo Liu   +4 more
openaire   +3 more sources

Co‐Evolution of Specific Stiffness and Permeability of Rock Fractures Offset in Shear

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 5, May 2025.
Abstract Fractures and faults represent planes of weakness and compliance in rock masses that serve as focal points for both microearthquakes and fluid transport, with seismicity and permeability evolution closely linked. Contact stiffness is highly stress‐sensitive and directly influences permeability. We explore the co‐evolution of specific stiffness
Xinxin He, Pengliang Yu, Agathe Eijsink, Chris Marone, Parisa Shokouhi, Jacques Rivière, Shimin Liu, Derek Elsworth   +7 more
wiley   +1 more source

Analysis of Gas Samples from Coalbed Methane Wells in Sullivan County, Indiana using Gas Chromatography [PDF]

, 2016
Although there has been an increase in natural gas production from coalbed methane (CBM) reservoirs in the past few decades, there are multiple inadequately known aspects of CBM reserves.
Niddery, Chad
core  

Evaluation of recoverable potential of deep coalbed methane in the Linxing Block, Eastern Margin of the Ordos Basin

Scientific Reports
AbstractThe deep coalbed methane (CBM) resources are widely developed in the Linxing Block. However, the evaluation of CBM geological areas suitable for CBM exploitation remains unexplored, hindering further development. This research optimizes the key geological parameters that influence the development of deep CBM from the perspectives of resource ...
Bo Chen, Song Li, Dazhen Tang, Yifan Pu, Guanghao Zhong   +4 more
openaire   +3 more sources

Study on the Multi‐Field Coupling Effect and Temperature Evolution Law of Coal and Gas Outburst Incubation Process in the Fault‐Affected Area

Energy Science &Engineering, Volume 13, Issue 4, Page 1771-1785, April 2025.
ABSTRACT The multi‐field coupling relationship and temperature evolution mechanism of gas‐containing coal in areas affected by geological structures were investigated, focusing specifically on the engineering aspects of a reverse fault in the No. 3 coal seam at the Xinjing Coal Mine. An analysis was conducted to examine the thermal‐fluid‐solid coupling
Jianfeng Hao, Han Liu, Weiji Sun, Runzhi Li, Zhanshan Shi, Shengjie Fang, Chunyu Guo   +6 more
wiley   +1 more source

Numerical modeling of deep coalbed methane accumulation in the central-eastern Ordos Basin, China

Natural Gas Industry B
Deep coalbed methane (CBM) has become one of the most significant potential sources of natural gas in China. However, the exploration and development of deep CBM in China is still in an initial stage, and its accumulation-forming characteristics require further study. Therefore, taking the No.
Bing Wang, Yougen Huang, Daofeng Zhang, Hua Wang, Xiaopeng Zheng, Jingyuan Liu, Long Wang, Wenke Huang, Xingguan Chen, Weiwei Hu, Baoxian Liu, Mengqing He, Wenhua Zhou   +12 more
openaire   +2 more sources

Pathways for Potential Exposure to Onshore Oil and Gas Wastewater: What We Need to Know to Protect Human Health

GeoHealth, Volume 9, Issue 4, April 2025.
Abstract Produced water is a chemically complex waste stream generated during oil and gas development. Roughly four trillion liters were generated onshore in the United States in 2021 (ALL Consulting, 2022, https://www.gwpc.org/wp‐content/uploads/2021/09/2021_Produced_Water_Volumes.pdf). Efforts are underway to expand historic uses of produced water to
Ayusha Ariana, Isabelle Cozzarelli, Cloelle Danforth, Bonnie McDevitt, Anna Rosofsky, Donna Vorhees   +5 more
wiley   +1 more source