陆小霞;黄文辉;陈燕萍;张守仁;吴见;徐延勇;

• 1:中国地质大学(北京)能源学院

• 2:中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室

• 3:中联煤层气有限责任公司研究中心

• 4:中原油田物探研究院

摘要(Abstract)：

煤层气的勘探开发已逐步转向埋深大于1 000m的煤层,以沁水盆地南部为研究背景,采集浅部与深部煤样,进行压汞和低温氮吸附实验,对比孔隙结构特征.结果表明:从浅部到深部,煤层微小孔的体积稍增多,中孔和大孔的略减.当煤层埋深小于750m,压汞曲线类型以Ⅱ型为主,孔隙形态以Ⅰ类开放孔为主,孔隙结构配置较好.当煤层埋深为750~1 100m,压汞曲线类型包括Ⅱ型和Ⅲ型,孔隙形态以Ⅱ类一端封闭型为主,孔隙结构复杂,存在一个过渡带.当煤层埋深大于1 100m,压汞曲线类型以Ⅲ型为主,孔隙形态主要为Ⅰ类开放孔,含有部分Ⅱ类和Ⅲ类孔,气体储存空间减小,孔隙结构配置较差.地应力是影响孔隙结构的关键因素,随着埋深的增大,地应力的分带性导致孔隙结构由较好,变为复杂的过渡带,最后变为较差.深煤层的过渡带物性参数显示较为复杂的变化特征,为深部煤层气的开发提供参考依据.

关键词(KeyWords)：深煤层;孔隙结构;孔隙形态;压汞曲线;低温氮吸附;过渡带

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2011ZX05042)

作者(Author):陆小霞;黄文辉;陈燕萍;张守仁;吴见;徐延勇;

Email:

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