Analysis and countermeasures for adaptability of drainage and recovery technology for shale gas [PDF]
Youqicang pingjia yu kaifa, 2020 Due to the own application conditions of the electric submersible pump and other drainage and gas recovery technologies, they cannot adapt to different drainage and gas recovery periods of shale gas wells in the south block of Pingqiao. In order to solve
ZHANG Honglu +4 more
doaj +2 more sources
Design of gas drainage monitoring system based on S7-1500R redundancy technology [PDF]
Meikuang Anquan, 2022 For the problems that the PLC controller failure in the gas drainage monitoring system makes the monitoring system unable to monitor and control the gas drainage system, a gas drainage monitoring system based on S7-1500R redundant PLC is designed ...
WANG Zuxun, CHENG Yulong
doaj +2 more sources
Undesorbable residual gas in coal seams and its influence on gas drainage [PDF]
International Journal of Mining Science and Technology, 2017 The definition of “residual gas” can be found in different scenarios, such as the “fast” and “slow” desorption methods of measuring gas content and the sorption hysteresis test and gas management of coal mines, however, its meaning varies a lot in ...
Gongda Wang +3 more
doaj +4 more sources
Influence of Long Boreholes Layout and Drilling Length on Gas Drainage Based on Multifield Coupling Model of Gas-Bearing Coal [PDF]
Advances in Civil Engineering, 2021 Gas drainage through long seam boreholes is an effective method to prevent gas disasters in coal mines. In this paper, a multifield coupling model of gas migration in gas-bearing coal was first established. Then, a quantitative characterization method of
Renjun Feng
doaj +2 more sources
Drainage ditches are year-round greenhouse gas hotlines in temperate peat landscapes [PDF]
, 2021 Our aim was to assess the role of ditches in the greenhouse gas budget of peat landscapes. Therefore, we quantified year-round (May 2017 till May 2018) emissions of ebullitive and diffusive methane and carbon dioxide emissions from 10 drainage ditches ...
Stepina, T. +6 more
core +1 more source
Experimental Determination on Shale Gas Loss During the Coring Process in Eastern Sichuan Basin
Frontiers in Energy Research, 2020 Shale gas loss by leakage directly affects the accurate measurement of shale gas content during drilling and coring. To accurately calculate shale gas loss, in combination with the actual situation of the shale coring, considering the influence factors ...
Junbo He +8 more
doaj +1 more source
A fully multifield coupling model of gas extraction and air leakage for in-seam borehole
Energy Reports, 2021 Air leakage around the in-seam borehole leads to a poor quality of gas extracted, thus gas outburst danger is difficult to eliminate but also may cause other disasters, such as coal spontaneous combustion and gas explosion.
Junxiang Zhang +4 more
doaj +1 more source
Characteristics of gas-oil contact and mobilization limit during gas-assisted gravity drainage process [PDF]
, 2022 Gravity can reduce the instability of the gas-oil contact that is caused by gas channeling in locations with low flow resistance, such as high-permeability layers, macropores, and fractures during the gas-assisted gravity drainage process.
Zheng, Rongchen +5 more
core +1 more source
Influence of Deformation and Instability of Borehole on Gas Extraction in Deep Mining Soft Coal Seam
Advances in Civil Engineering, 2021 To study the effects of the three deformation instability modes of gas drainage borehole on gas drainage, the deformation instability mechanism of soft coal seams is analyzed, three deformation instability modes are proposed for soft coal seams, namely ...
Xue-Bo Zhang +4 more
doaj +1 more source