张艳玉,尚凡杰,孙晓飞,李素芹,孙仁远

• 1:中国石油大学(华东)石油工程学院

摘要(Abstract)：

煤层气开采过程中储层渗透率的变化对产气量影响较大,通过引入S&D渗透率变化模型,建立了考虑渗透率变化的煤储层三维气水两相渗流数学模型,完成模型检验后应用所编制软件研究了煤储层参数、吸附参数及渗透率模型特征参数对开发效果的影响。结果表明,煤层气产量随着初始含气量、煤层有效厚度、裂缝渗透率和Langmuir压力的增大而增大,随储层原始压力、裂缝孔隙度和Langmuir体积的增大而减小,而解吸时间对产气量影响不大;裂缝渗透率随着杨氏模量和基质收缩/膨胀系数的增大而增大,随泊松比和裂缝压缩系数的增大而减小。引入S&D模型后计算的累积产气量要比常规模型低1.3%,因此不可忽视煤层气产出过程中渗透率的变化。

关键词(KeyWords)： 煤层气;数值模拟;渗透率变化;参数敏感性;IMPES

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项(2009ZX05042-003);; 中央高校基本科研业务费专项资金资助项目(09CX05003A)

作者(Author): 张艳玉,尚凡杰,孙晓飞,李素芹,孙仁远

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