Results 91 to 100 of about 2,636,818 (211)
Methane emission from U.S. coal mines in 1975 : a survey : a supplement to Information circulars 8558 and 8659 [PDF]
This Bureau of Mines report tabulates methane emissions from U.S. bituminous coal mines with daily emission rates of at least 100,000 cfd according to States, counties, and coalbeds.
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Characterization of brittleness property for deep coalbed methane reservoirs based on ultrasonic test data [PDF]
To explore the brittleness and its anisotropy of deep coalbed methane reservoir, the effects of parameters such as the total content of organic matter and clay and the preferred orientation degree, equivalent porosity and pore aspect ratio on the ...
LIU Yi +6 more
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Youqi dizhi yu caishouluThe deep part of the Ordos Basin is rich in coalbed methane resources. Understanding the characteristics of deep coalbed methane accumulation is of great geological significance for the geological evaluation and selection of deep coalbed methane ...
LIU Honglin +3 more
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EnergiesTo investigate the three-dimensional spatial distribution characteristics of fluids during the combined production of coalbed methane from multi-coal reservoirs (MCR), a physical simulation test platform was established, and a quantitative ...
Anxu Ding +5 more
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Factors influencing the production of coalbed methane from deep reservoirs
Meitian dizhi yu kantanObjectiveThe production characteristics of coalbed methane (CBM) from deep reservoirs differ significantly from those of CBM from shallow reservoirs. Key challenges in deep CBM production include maintaining reservoir permeability or minimizing permeability loss, enhancing CBM (CH4) desorption efficiency, and accurately predicting the laws of CH4 ...
Zhenzhi WANG +4 more
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Methane emissions from an advancing coal mine section in the Pittsburgh coalbed [PDF]
"The methane emissions from an advancing coal mine section were continuously monitored for 120 days. During this time, the section advanced 2,000 feet into virgin Pittsburgh coalbed producing 54,565 tons of coal with a total methane emission of 91 ...
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Yantu gongcheng xuebaoTypical hidden engineering characteristics exist for mining curtain grouting, especially in the complex geological conditions of inclined shaft in dynamic water sanding area, there is a greater blindness in the determination of its technical parameters ...
FAN Gangwei1, 2 , REN Chuangnan1 , ZHANG Dongsheng1, 2, MA Zhuang3, FAN Zhanglei1, 2, ZHANG Shizhong1, 2, HAN Xuesen1, XU Guangzheng
doaj +1 more source
Removing methane (degasification) from the Pocahontas No. 4 coalbed in southern West Virginia [PDF]
"Tests were conducted in the Pocahontas No. 4 coalbed in southern West Virginia to determine if successful degasification techniques, developed during an earlier study in the Pittsburgh coalbed, would be effective in removing methane from those usually ...
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Coalbed Methane Production: Why Coal Permeability Matters
, 2010 When coalbed methane is recovered, complex interactions of stress and chemistry have a strong influence on the properties of the coal. These include influences on gas desorption and flow, coal deformation, porosity change and permeability modification ...
Luke D. Connell +3 more
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Energy Exploration & ExploitationThis study builds upon the research progress in the theories of CBM desorption, diffusion, and seepage flow to explore the production mechanisms of deep coalbed methane (CBM) in the Daing-Jixian block, aiming to achieve scientific and reasonable control of gas wells.
Lizhu Yu +6 more
openaire +2 more sources