Results 101 to 110 of about 218,589 (182)

Prediction of estimate ultimate recoverable of coalbed methane horizontal wells in Zhengzhuang block of Southern Qinshui Basin and technical countermeasures for enhancing recovery rate

Meitan kexue jishu
The single-casing segmented-fracturing horizontal well has currently become the main development well type in the Zhengzhuang block. However, it is currently characterized by large differences in single-well production, rapid local production decline ...
Cong ZHANG, Kexin LI, Lilong WANG, Chunchun LIU, Ruiqiang YANG, Guangjie SANG, Wuchang ZHANG, Jun LI, Shan HE, Zelong WANG   +9 more
doaj   +1 more source

Degasification Study from an Air Shaft in the Beckley Coalbed [PDF]

"The Bureau of Mines conducted research to degasify a virgin block of coal in the Beckley coalbed using long horizontal holes drilled in an array from the bottom of a ventilation air shaft. Eight horizontal holes and an in situ pressure hole were drilled

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Study on CRIP process of underground coal gasification coupled with high-power microwave heating

Meitan kexue jishu
The Controlled Retraction Injection Point (CRIP) process of underground coal gasification can mine in situ medium-deep coal resources efficiently and transform rich coal resources in China into strategic and scarce gas resources.
Tengze GE, Chuangye WANG, Meng LIU, Danlu LIU, Ersi GAO, Song WU, Shuxia YUAN, Yuguang FAN   +7 more
doaj   +1 more source

Coalbed Methane. 2015 - 2019 Bibliometric Analysis

, 2019
Motivations: It is estimated that the forecasted methane resources of Russia's main coal basins contain 83.7 trillion cubic meters, representing roughly one-third of the country's natural gas reserves, but the production of CBM is rather small.
Boris Chigarev (6474086)
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Drilling a horizontal coalbed methane drainage system from a directional surface borehole [PDF]

"Three long horizontal holes were drilled from a directionally drilled surface hole at the Emerald Mine near Waynesburg, Pennsylvania. The purpose was to adapt the technique of directional drilling for use in draining methane from coalbeds.

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Application validation and high-yield mechanism analysis of the desorption superposition effect method in Fukang block 8 based on well FS-24

Scientific Reports
Multi-seam combined production is crucial for enhancing single-well output in coalbed methane extraction. However, challenges persist in identifying the contribution of individual seams, predicting production capacity, and optimizing seam combinations ...
Li Wenjie, Wang Fengnian, Qiu Chenglong, Zhang Nan, Sang Xiaofei, Sun Hangyu   +5 more
doaj   +1 more source

Rotary drilling techniques used in the Beckley coalbed [PDF]

"The U.S. Bureau of Mines used a contact drilling strategy with short- collared assemblies in order to rotary drill long horizontal methane drainage holes in the Beckley coalbed near Glen Daniel, West Virginia. By decreasing the thrust and increasing the

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Methane control for underground coal mines [PDF]

"Ventilation has long been the primary means of controlling methane emissions in underground coal mines. However, as mining has progressed into gassier areas of U.S.

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The direct method of determining methane content of coalbeds for ventilation design

"The applicability of the "direct method" for determining the methane content of virgin coalbeds was tested. Preliminary results indicate that the direct method, when applied to exploration cores, can be successfully used to estimate coalbed gas content ...

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Fundamentals of coalbed methane reservoir engineering

This straightforward introduction to coalbed methane gives insight and detail to industry professionals involved with this unique energy resource. Author John Seidle reviews global and U.S.
Seidle, John
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