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首页> 外文期刊>Journal of natural gas science and engineering >Optimization of abandoned gob methane drainage through well placement selection
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Optimization of abandoned gob methane drainage through well placement selection

机译：通过选择井位来优化废弃的采空区瓦斯抽采

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摘要

Abandoned gob methane (AGM) is not only a greenhouse gas but also a source of clean energy. To optimize the vertical well location for AGM drainage, AGM drainage simulation experiments for different well locations were carried out using the "simulated experimental system for AGM drainage". A numerical model using FLUENT for AGM drainage was established. The control range of vertical wells at different well locations was determined using the results from the numerical model. The simulation experiment results showed that the O-ring fissure zone is the most suitable area for the location of the vertical well. Yangquan Coal Mine No. 3 in China is an abandoned coal mine with massive coalbed methane reserves. Vertical well #1 in Yangquan Coal Mine No. 3 was located within the O-ring fissure zone according to the simulation experiment results. The field test results for vertical well #1 showed that the gas flow rate reached 3.77 m(3)/min, and AGM production reached 33,000 m(3) in total after 226 h of suction. In order to achieve a higher gas concentration, the gob burial depth should be taken into account during abandoned gob methane drainage. (C) 2015 Elsevier B.V. All rights reserved.
机译：废弃的煤层气（AGM）不仅是温室气体，而且还是清洁能源。为了优化用于AGM排水的垂直井位置，使用“用于AGM排水的模拟实验系统”对不同井位置进行了AGM排水模拟实验。建立了使用FLUENT进行AGM排水的数值模型。使用数值模型的结果确定不同井位置的垂直井的控制范围。模拟实验结果表明，O形圈裂缝区是垂直井位置最合适的区域。中国阳泉三号煤矿是一个废弃的煤矿，煤层气储量巨大。根据模拟实验结果，阳泉3号煤矿1号垂直井位于O型圈裂缝带内。垂直井＃1的现场测试结果表明，吸气226 h后，气体流速达到3.77 m（3）/ min，AGM产量总计达到33,000 m（3）。为了获得更高的气体浓度，在废弃的采空区瓦斯甲烷排放期间应考虑采空区的埋藏深度。 （C）2015 Elsevier B.V.保留所有权利。

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