东营凹陷沙河街组页岩油储层微观孔隙结构研究

发布时间：2018-11-19 08:39

【摘要】：储层微观孔隙结构研究可为页岩油勘探开发提供依据。利用氩离子抛光-扫描电镜实验和孔隙图像储层结构参数统计方法,分析了渤海湾盆地东营凹陷沙河街组18块岩芯样品的微观孔隙发育特征。结果表明,东营凹陷沙河街组页岩油层段的孔隙类型主要包括粒间孔、溶蚀孔、晶间孔和晶内孔,泥质粒间孔提供的面孔率贡献最大,溶蚀孔对有较高的面孔率贡献,晶间孔和晶内孔的面孔率贡献最低。页岩油储层孔隙的孔径属于纳米级和微米级,数量上纳米级孔隙占绝对优势,但储层面孔率主要由在数量上不占优势的微米级孔隙提供。因此,东营凹陷沙河街组页岩油层段的主要储集空间属于微米级孔隙。
[Abstract]:The study of reservoir micropore structure can provide basis for shale oil exploration and development. By means of argon ion polishing and scanning electron microscopy (SEM) experiments and pore image structure parameters statistical method, the micropore development characteristics of 18 core samples of Shahejie formation in Dongying depression, Bohai Bay Basin are analyzed. The results show that the pore types of Shale reservoir of Shahejie formation in Dongying depression mainly include intergranular pore, solution pore, intergranular pore and intergranular pore, and the pore between mud plasmids provides the largest contribution to the porosity, and the dissolution pore contributes to the higher porosity. Intergranular pores and intracrystalline pores contribute the least. The pore size of shale oil reservoir belongs to nanometer scale and micron scale, but the pore size of shale oil reservoir is mainly provided by micron pore which is not dominant in quantity. Therefore, the main reservoir space of Shale reservoir of Shahejie formation in Dongying sag belongs to micrometer pore.
【作者单位】：中国石化胜利油田分公司;"油气藏地质及开发工程"国家重点实验室·成都理工大学;页岩气评价与开采四川省重点实验室(四川省煤田地质局);
【基金】：国家重点基础研究发展计划(973计划)(2014CB239103) 中国石化股份公司重点科技攻关课题(P13059)
【分类号】：P618.13

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