Results 81 to 90 of about 588,838 (198)
Geological factors affecting methane in the Beckley coalbed [PDF]
"This Bureau of Mines study reviews the geological factors that affect methane in the Beckley coalbed in southern West Virginia, including overburden, coalbed structure, type of and changes in lithology above and below the Beckley coalbed, and presence ...
core
Influence of tight sandstone gas in roof on gas production in deep coalbed methane wells: A case study of Shenfu block in Ordos Basin [PDF]
Youqicang pingjia yu kaifaIn the Shenfu block located on the eastern margin of the Ordos Basin, the deep coal seam is intimately interlayered with the tight sandstone layer. During the development of deep coalbed methane, a notable phenomenon has been observed whereby tight ...
WANG XIAODONG +8 more
doaj +2 more sources
Youqicang pingjia yu kaifa, 2022 Finding out the hydrogeological conditions and it’s controlling gas effects of CBM（coalbed methane） development area is important, which can provide a foundation for further development well location deployment. Taking the No.15 coal seam of Songta Block
WANG Wensheng +4 more
doaj
Progress in feature research topics in deep underground
Deep Underground Science and Engineering, Volume 4, Issue 3, Page 339-340, September 2025.
Jianguo Wang, Chunfai Leung
wiley +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
A Fully Coupled Gas–Water–Solids Mathematical Model for Vertical Well Drainage of Coalbed Methane
EnergiesThe coupling relationship between the deformation field, the diffusion field, and the seepage field is an important factor in fluid transport mechanisms in the long-term coalbed methane (CBM) exploitation process. A mathematical model of gas–water two-phase fluid–structure coupling in a double-porosity medium in coal reservoirs is established in this ...
Wang, Chengwang +4 more
openaire +2 more sources
, 2022 Based on survey data of coalbed methane exploration and development projects in China, the production status of coalbed methane fields and scientific & technological achievements, this paper analyzes the comprehensive control technical measures for ...
Shouren, ZHANG +2 more
core
Pressure-Controlled Drainage Strategy for Deep Coalbed Methane Wells Considering Stress Sensitivity
ProcessesChina’s deep coalbed methane (CBM) resources hold significant development potential, yet their commercial exploitation remains hindered by four interrelated reservoir challenges: substantial burial depth, elevated in situ stress, ultra-low matrix permeability, and pronounced stress-dependent permeability decline.
Zhengyan Zhao +7 more
openaire +1 more source
Methane emission rate study in a deep Pocahontas No. 3 coalbed mine in conjunction with drilling degasification holes in the coalbed [PDF]
"A degasification experiment was conducted in a Pocahontas No. 3 Coalbed mine in Virginia. It involved (1) drilling holes in the coalbed in the outside headings of a set of five being developed in virgin area and (2) conducting a methane emission rate ...
core
Meitan kexue jishuIn order to clarify the key technologies for the coordinated development of coal and coalbed methane that are compatible with the mining conditions of inclined broken soft coal seams.
Yunpei LIANG +6 more
doaj +1 more source