Results 81 to 90 of about 2,636,818 (211)

Design of a Pressure-Preservation Coring Tool for Deep and Ultra-Deep Coalbed Methane Samples

Shiyou jixie, 2020
Conventional coalbed methane coring tools and pressure/temperature-controlled oil-gas coring tools are difficult to obtain valuable coal cores from deep coal reservoirs.
Wang Xigui, Zou Deyong, Yang Liwen, Liu Xiaoao   +3 more
doaj  

Coalbed Methane: Conventional Rules for an Unconventional Resource [PDF]

, 2004
Considering the evolution of coalbed methane development In North America, the authors highlight the risks involved at various stages of development.
Buckingham, Janice, Steele, Patricia
core   +1 more source

Study on dynamic stress field of fracturing in horizontal wells of deep coal seams: A case study of Daning-Jixian block in Ordos Basin [PDF]

Youqicang pingjia yu kaifa
China’s deep coalbed methane demonstration base has been preliminarily established and is gradually entering an important stage of large-scale exploration and development.
ZHAO Haifeng, WANG Chengwang, XI Yue, WANG Chaowei
doaj   +1 more source

Methane control by isolation of a major coal panel : Pittsburgh coalbed [PDF]

"As one of its projects for degasification of major panels of coal prior to mining within them, the Bureau of Mines conducted methane emission studies during development of a set of three headings 1,800 feet in a major coal panel (2,700 by 3,500 feet ...

core  

Regulation mechanism of slickwater on desorption interface of deep coalbed methane

Duankuai youqitian
Aiming at the problems of difficult desorption of deep coalbed methane (methane) and low productivity after fracturing in the development of deep coalbed methane in Daniudi Gasfield, experiments such as methane desorption performance testing, core damage
LUO Yi,FANG Yanjun,QIAO Qianyu
doaj   +1 more source

Methane drainage study in the Sunnyside coalbed, Utah [PDF]

"The Bureau of Mines is conducting research to determine the effectiveness of long holes in degasifying an area of the upper split of the lower Sunnyside coalbed at Kaiser SteelCompany's Sunnyside No. 1 mine. These holes were drilled from the two outside

core  

An Analysis of Hydrogeological Conditions of Deep Coalbed Methane

OALib, 2023
openaire   +1 more source

Geological characteristics and resource potential of deep coalbed methane in Guizhou

Meitan xuebao
Accelerating the exploration and development of deep ( > 1 000 m)coalbed methane (CBM) resources is an important way for the large-scale development of CBM and an important development direction in recent years. Guizhou Province is rich in CBM resources, with a large proportion of deep CBM resources.
Zhaobiao YANG, Wei GAO, Yong QIN, Mengjiang ZHANG, Cunlei LI, Zhihua YAN, Yuhui LIANG, Benju LU, Yilin CHEN, Caifang WU, Jie CHEN, Geng LI, Dexiu WEN   +12 more
openaire   +1 more source

Optimization Design of Deep-Coalbed Methane Deliquification in the Linxing Block, China

Processes
The production of deep-coalbed methane (CBM) wells undergoes four stages sequentially: drainage depressurization, unstable gas production, stable gas production, and gas production decline. Upon entering the stable production stage, the recovery rate of deep CBM wells is constrained by bottom hole flowing pressure (BHFP).
Bing Zhang, Wenbo Jiang, Haifeng Zhang, Yongsheng An   +3 more
openaire   +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 ...

core