Optimization Method of Production System for Coalbed Methane Wells throughout Life Cycle

煤层气 环境科学 生产(经济) 石油工程 生化工程 工艺工程 废物管理 工程类 煤矿开采 经济 宏观经济学
作者
Chen Li,Lichun Sun,Zhigang Zhao,Jian Zhang,Cunwu Wang,Gang Lei,Yong Li,Yanjun Meng
出处
期刊:Energies [Multidisciplinary Digital Publishing Institute]
卷期号:17 (4): 789-789 被引量:1
标识
DOI:10.3390/en17040789
摘要

Different from conventional gas reservoirs, the permeability of coalbeds is affected by stress sensitivity and matrix shrinkage during production. These two conditions lead to lower permeability in the reservoir and affect the production efficiency of the gas well. In addition, coalbed methane wells have single-phase water flow in the initial stage of production. When the reservoir pressure is reduced to its critical desorption pressure, the adsorbed gas in the reservoir desorbs into the pore space and participates in the flow. The flow state in the reservoir changes from single-phase to two phase, and the permeability of the reservoir decreases. The occurrence of these three damage mechanisms is related to the flow rate of fluid in the reservoir. At present, there is a lack of research on the optimization of drainage and production systems considering the damage mechanism of coal reservoirs. This study comprehensively considers how to optimize the production rate of coal reservoirs under the influence of stress sensitivity, matrix shrinkage and two phase flow in the production process to achieve the purpose of production with the least damage to the reservoir.
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