Results 61 to 70 of about 6,533 (232)
Prediction of Coalbed Methane Production Based on BP Neural Network [PDF]
, 2019 The low average daily gas production per well and the poor economic benefit of exploration and development have become the main problems restricting the exploration and development of coalbed methane in China.
Yifang Tang +4 more
core +1 more source
Methane migration characteristics of the Pocahontas No. 3 coalbed [PDF]
"Methane-flow and pressure data taken from a mine in the Pocahontas No. 3 Coalbed are compared with flow rates from lump coal obtained in laboratory experiments.
core
The composition of coalbed gas [PDF]
"Samples of gas were obtained directly from the coalbed during drilling of horizontal and vertical boreholes in six different formations. The samples were analyzed by gas chromatography for C1 to C5 hydrocarbons and for 02, N2, H2, He, and CO2.
core
The disaster law and control measures of high-stress tunnels in fault areas: a case study
Scientific ReportsIn recent years, the frequent occurrence of dynamic disasters in tunnels with high stress in fault areas has greatly threatened engineering safety. The typical case – a tunnel influenced by fault slip on is taken as a research object.
Wenjie Li +7 more
doaj +1 more source
Optimization and application of sand bailing technology for coalbed methane horizontal wells
Meitian dizhi yu kantanObjective and Methods Coalbed methane (CBM) horizontal wells face challenges such as sand accumulation in completion strings, pipe wall scaling, and pump sticking, leading to declined CBM production or shutdown of these wells.
Fei ZHANG +10 more
doaj +1 more source
Methane emission rate studies in a northern West Virginia mine [PDF]
"Methane emission rates were studied in a Pittsburgh coalbed mine in northern West Virginia. A fullface boring-type continuous miner, equipped with a methane monitor, was used in the development of a set of eight main headings, one side of which was near
core
Shiyou jixieDeep coal-rock gas reservoir is sensitive to downhole pressure variation， and implementing kill operation may cause damage to gas production. Consequently， a full-process pressure-maintained operation technique of dual-tubing jet pump for deep coal-rock ...
Wu Jianjun +6 more
doaj +1 more source
Peat, coal and coalbed methane [PDF]
Multiple stratigraphic intervals in the subsurface of the Netherlands contain layers of peat and coal. These include (pre-)Holocene peat, Miocene lignite and upper Carboniferous (Westphalian) bituminous coal and anthracite, all of which have played important roles as energy sources in the country.
Bergen, F. van, Koster, K.
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
Comparative metagenomics of coalbed methane microbial communities reveals biogenic methane potential in the Appalachian Basin [PDF]
, 2018 Natural gas is a major source of global energy, and a large fraction is generated in subsurface coalbed deposits. Microbial communities within coalbed deposits impact methane production, and as a result contribute to global carbon cycling. The process of
Kelvin B. Gregory +3 more
core +1 more source