宋晨,杨兵,张超谟,朱博远,张占松

• 1:长江大学油气资源与勘探技术教育部重点实验室
• 2:中国石化华北油气分公司采气一厂

摘要(Abstract)：

渤中19-6砂砾岩孔隙结构复杂，为提高渗透率的估算精度，需要从孔隙结构入手，找到与渗透率相关性最好的孔隙结构因素。以43块孔店组砂砾岩的孔隙结构和渗透率为研究对象，利用岩石铸体薄片确定发育的孔隙类型，通过高压压汞获取孔喉分布特征和孔隙结构参数。结合孔隙类型和孔隙结构参数分析孔隙结构和渗透率的关系，建立了基于孔隙结构参数的渗透率评价模型。研究表明，不同类型溶蚀孔隙的孔隙结构存在差异，粒内溶孔的孔隙结构最好，胶结物溶孔的孔隙结构最差。溶蚀孔隙类型发育不同，物性差异较大，以粒内溶孔为主且不发育胶结物溶孔的岩样物性最好。不同孔隙结构因素对渗透率控制程度不一致，其中基于孔喉大小、连通、配比和几何形状这4种因素建立的渗透率模型精度最高。渤中19-6气田孔店组砂砾岩粒内溶孔具有较大的孔喉半径和较好的连通性是促使该类岩石储集和渗流能力均较好的主要原因。平均孔喉半径、退汞效率、平均孔喉体积比和分形维数适用于估算孔隙结构复杂且(特)低孔渗的砂砾岩储层渗透率，以期为渤海湾盆地渤中凹陷砂砾岩储层的渗透率评价提供技术支持。

关键词(KeyWords)： 孔隙结构;渗透率;孔隙结构参数;高压压汞;砂砾岩;渤中19-6

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项(2017ZX05032-003-005)

作者(Author): 宋晨,杨兵,张超谟,朱博远,张占松

DOI: 10.19509/j.cnki.dzkq.2022.0093

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