Results 71 to 80 of about 218,589 (182)

Study on Interface Effect of Surfactant/Coal Composite System and Desorption Law of Methane

Zuanjingye yu wanjingye
To address the key issue of surfactant-controlled coal wettability and desorption of methane in deep coalbed methane (CBM) development, coal-rock samples were taken from the Benxi Formation of the Erdos Basin to study the pattern of how surfactants ...
Pu YUAN, Songtao MU, Zhenji WEI, Chunhu LI, Xueguang ZHU, Zhao JIANG, Liang MA   +6 more
doaj   +1 more source

Guidelines for the prediction and control of methane emissions on longwalls [PDF]

"Although longwall mining productivity can far exceed that of room-and-pillar mining, the total methane emissions per extracted volume associated with longwall sections are generally higher than those for continuous miner or pillar removal sections ...

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Research on Wellbore Quality Control Technology for Coalbed Methane Deviated Wells [PDF]

, 2014
Deviated well is one of the main well types to develop coalbed methane in China. It's been widely used by various coalbed methane companies in recent years.
Shichao, Li, Zhixin, Mao, Baoshan, Zhao
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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

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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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

A High Efficiency Low Damage Fracturing Fluid for Deep Coalbed Methane Development

Zuanjingye yu wanjingye
In developing deep coalbed methane (CBM), existing fracturing fluids have deficiencies such as poor sand carrying capacity and high core damage. To overcome these deficiencies, a fracturing fluid system (HMP/OP) was developed with a main fracturing fluid
Huaibin ZHEN, Shuguang LI, Feng WANG, Tengze GE, Ersi GAO, Kun FENG   +5 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

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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World coalbed methane projects [PDF]

, 2002
Worldwide coalbed methane resources, once considered as a new "unconventional" natural gas resources, are now being recognised as a potential source of methane in many countries with extensive coal basins. Coal deposits occur abundantly in many locations
Rychlicki, S., Twardowski, K.
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