王红梅,黄杰,郭发军,陶亚媛,毛瑜,单晓琨,钟新宇,朱玉双
WANG Hongmei,HUANG Jie,GUO Fajun,TAO Yayuan,MAO Yu,SHAN Xiaokun,ZHONG Xinyu,ZHU Yushuang

• 1:中国石油华北油田分公司勘探开发研究院
• 2:西北大学大陆动力学国家重点实验室
• 3:西北大学地质学系

摘要(Abstract)：

渤海湾盆地束鹿凹陷新近系馆陶组新发现含油储层储量较为丰富,但复杂的孔隙结构制约了其有效开发。以束鹿凹陷馆陶组储层为研究对象,利用铸体薄片、扫描电镜、岩石物性和压汞等测试资料,对储层岩石学特征、微观孔隙结构和成岩作用特征进行了系统研究,并分析了成岩作用对孔隙结构的影响。研究表明:馆陶组储层整体弱胶结,杂基含量高,有效孔隙主要为杂基溶孔、残余粒间孔和长石溶孔,孔隙结构分为Ⅰ类残余粒间孔—粒间溶孔型、Ⅱ类粒间溶孔—残余粒间孔型、Ⅲ类粒内溶孔—残余粒间孔型3种类型;压实作用使孔隙度损失27.78%,胶结作用使孔隙度损失2.64%,溶蚀作用使孔隙度增加15.93%,溶蚀作用极大地改善了储层孔隙结构;不同类型的成岩作用形成了不同类型的孔隙结构,杂基的强烈溶蚀形成Ⅰ类孔隙结构,Ⅱ类孔隙结构主要受压实后残余粒间孔喉控制,Ⅲ类孔隙结构主要受压实作用和长石溶蚀影响。研究成果为束鹿凹陷馆陶组的高效开发提供了理论依据。
The newly discovered oil-bearing reservoir in Neogene Guantao Formation of Shulu Sag of Bohai Bay Basin is rich in reserves, but its effective development is restricted by the complex pore structure. Taking Guantao Formation reservoir in Shulu Sag as the research object,the petrological characteristics, micro pore structures and diagenesis of the reservoir were systematically studied with the help of the casting thin section, scanning electron microscope, petrophysical properties and mercury-injection tested data, and the influences of diagenesis on the pore structures was analyzed. The studies show that the reservoir of Guantao Formation is weakly cemented overally with high-content matrix. The effective pores are mainly matrix dissolved pores, residual intergranular pores and feldspar dissolved pores. The pore structures can be divided into three types: TypeⅠresidual intergranular pore-intergranular dissolved pore, TypeⅡintergranular dissolved pores-residual intergranular pore and Type Ⅲ intragranular dissolved pores-residual intergranular pore. The porosity loss is 27.78% caused by compaction and 2.64% by cementation, the porosity increase is 15.93% thanks to the dissolution which has greatly improved the pore structures of the reservoir. Different types of the diagenesis result in various types of pore structures,the strong dissolution of matrix forms TypeⅠpore structure, Type Ⅱ pore structure is mainly controlled by residual intergranular pore-throat after compaction and Type Ⅲ pore structure is primarily affected by compaction and feldspar dissolution. The research results have provided theoretical evidences for the high-efficiency development of Guantao Formation in Shulu Sag.

关键词(KeyWords)： 微观孔隙结构;成岩作用;弱胶结;强溶蚀;馆陶组;束鹿凹陷
micro pore structure;diagenesis;weak cementation;strong dissolution;Guantao Formation(Ng);Shulu Sag

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司重大科技专项“华北油田持续有效稳产勘探开发关键技术研究与应用”(2017E-15)

作者(Author): 王红梅,黄杰,郭发军,陶亚媛,毛瑜,单晓琨,钟新宇,朱玉双
WANG Hongmei,HUANG Jie,GUO Fajun,TAO Yayuan,MAO Yu,SHAN Xiaokun,ZHONG Xinyu,ZHU Yushuang

DOI: 10.19597/j.issn.1000-3754.202005029

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