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OALib Journal期刊
ISSN: 2333-9721
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煤基质收缩和膨胀对甲烷开采和二氧化碳存储的影响
Keywords: ch4开采,co2存储,基质收缩和膨胀,数值模拟
Abstract:
？应用耦合的煤层气数值模型，模拟和对比了3种不同的煤基质收缩和膨胀模型模拟的渗透率、ch4产量、ch4含量分布、co2注入量和co2存储量。在无co2注入情况下，考虑吸附/解吸附作用的煤基质收缩/膨胀模型最大的渗透率为初始渗透率的6倍，而只考虑压力作用的煤基质收缩/膨胀模型渗透率下降2%，ch4累积产量前者是后者的1.3倍；在co2注入情况下，考虑吸附/解吸附作用的模型最大的渗透率为原来的1.25倍，最小为原来的0.17倍，而只考虑压力作用的煤基质收缩/膨胀模型渗透率下降1.6%，ch4累积产量前者是后者的1.5倍，而co2的注入速度和存储量后者分别是前者的14倍和3.85倍。结果表明：煤基质收缩/膨胀对ch4开采和co2都有影响，吸附/解吸附导致的基质收缩/膨胀起主要作用。
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