赵丁丁,侯加根,王秀杰,刘钰铭,陈儒贤,张占杨

• 1:中国石油大学(北京)油气资源与探测国家重点实验室
• 2:中国石油大学(北京)地球科学学院
• 3:中国石油吉林油田川南天然气勘探开发分公司技术研究中心
• 4:中国石化华北油气分公司勘探开发研究院

摘要(Abstract)：

为了明确致密砂岩气藏储层微观孔喉对气水相渗特征的控制机理，更好地指导气田增储上产，以东胜气田J72井区下石盒子组储层为研究对象，综合多种分析化验资料并细分岩石相探究了微观孔喉参数对气水渗流能力的影响，揭示了不同岩石相对含气性及产能的控制作用。研究结果表明：J72井区下石盒子组岩石相可以归纳为砾岩相、砾质砂岩相、含砾粗砂岩相、中细砂岩相、泥岩相五大类，其中含砾粗砂岩相、砾质砂岩相为优质岩石相；孔隙类型主要为次生粒间溶孔，平均占比达48.5%,含砾粗砂岩相、砾质砂岩相、中细砂岩相的粒间溶孔比例依次减少，三类岩石相均具有多重分形的特征，大孔比例逐渐降低，其中优质岩石相的物性好、综合分形维数小；优质岩石相的黏土矿物含量低、平均孔喉半径大，气体渗流时的可动气体孔隙度和最大有效气相渗透率较大，含气性好。综合研究认为优质岩石相是控制气井高产稳产的关键因素，深入剖析岩石相的微观特征可以为致密砂岩气藏的高效开发提供有力指导。

关键词(KeyWords)： 鄂尔多斯盆地;致密砂岩气藏;岩石相;孔喉结构;气水相渗特征

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(42172154)

作者(Author): 赵丁丁,侯加根,王秀杰,刘钰铭,陈儒贤,张占杨

DOI: 10.19509/j.cnki.dzkq.tb20220517

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