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Optimization of Nitrogen Injection Parameters for a Partial W‑Type Ventilation Goaf at Duanwang Mine. [PDF]

ACS Omega
Zhang X, Li Z.
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Gas drainage efficiency: an input–output model for evaluating gas drainage projects

Natural Hazards, 2014
Gas drainage not only ensures safety in coal mine but also produces clean energy and reduces emission of greenhouse gases. However, a good method to evaluate the efficiency of gas drainage is still absent. In this study, we firstly propose a definition of gas drainage efficiency which is defined as the ratio of the real output–input efficiency to the ...
Fu-bao Zhou, Xin-xin Wang, Ying-ke Liu
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Gas Injection for Upstructure Drainage

Journal of Petroleum Technology, 1971
Here are a theoretical analysis and a summary of field data on the performance of upstructure drainage projects in which gas is injected and performance of upstructure drainage projects in which gas is injected and oil is produced through the same well in a cyclical operation.
George D. Combs, Raymond B. Knezek
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Miscible Gas/Oil Gravity Drainage

International Oil Conference and Exhibition in Mexico, 2006
Abstract Oil recovery from oil and mixed-wet naturally fractured reservoirs is difficult. Standard production mechanisms like water injection and countercurrent imbibition will not work. Gas–oil gravity drainage (GOGD) is then the production mechanism of choice.
Marco Verlaan, Paulus Boerrigter
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Gas Injection for Upstructure Oil Drainage

Journal of Petroleum Technology, 1979
Any attic oil project tries to displace with gas the oil located above the structurally highest well in the reservoir. Results from a numerical simulator show that the most important controllable variable in attic oil recovery is the volume of gas injected during each cycle.
R.F. Strickland, R.A. Morse
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Investigate on mechanism of nanofluid drainage gas recovery in tight gas reservoir

Petroleum Science and Technology, 2021
Conventional drainage gas recovery and water-controlled gas recovery technologies are difficult to meet the needs of tight gas reservoirs.
Qin Guowei, Liu Qingping, Zhang Beilei, Sun Saisai, Zheng Yanzhao, Qin Wenlong, Wu Mei   +6 more
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Gas drainage technology of high gas and thick coal seam

Journal of Coal Science and Engineering (China), 2009
Gas drainage in Jincheng Mining Group Co., Ltd. was introduced briefly and the importance of gas drainage in gas control was analyzed. Combined with coal-bed gas occurrence and gas emission, the double system of gas drainage was optimized and a progressive gas drainage model was experimented on.
Tian-cai He, Hai-gui Li, Hai-jun Zhang
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Mathematical Description of Gas Drainage Radius for Underground Gas Storage

Chemistry and Technology of Fuels and Oils, 2018
Most underground gas storage in China encounters the problem of evaluating gas drainage. In order to evaluate the gas reservoir parameters, we propose a mathematical model for calculating the gas drainage radius. The model describes the gas seepage mechanism based on material balance, and lets us evaluate the gas drainage radius for any well pattern ...
Tang Ligen, Ding Guosheng, Sun Chunhui, Wang Jieming   +3 more
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Studies on Improving Drainage Gas Recovery Efficiency of Gas Wells

2018
Nearly forty percent of gas wells in Daqing Oil Field have been producing water, resulting in reduced production and increased cost. Reasonable measures are required to improve drainage gas efficiency of these wells. Based on the influencing factors of drainage gas recovery process, efficiency could be improved in three aspects, including optimizing ...
M. Cai, P. G. Ma, J. Q. Wang, W. H. Ma, C. G. Wang, Z. P. Yang, J. L. Li, N. Li   +7 more
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