摘要
运用综合地质研究的方法,从储集层物性、储层的岩石学、沉积微相、成岩作用等方面综合研究分析了鄂尔多斯盆地合水地区长3油层组储层物性的差异性。结果表明:合水地区长3整体物性特征是低孔、低渗,但在部分井段出现了相对高孔、高渗储集层。造成这种物性差异性的原因主要有:①碎屑岩中石英含量高低对储层物性有一定的影响,石英含量高,物性好,反之则差。②在储集沉积微相中,分流河道储层物性较好,分支河口砂坝物性相对较差。③压实作用,高岭石胶结、绿泥石充填、硅质胶结等对储集层物性起到破坏作用。绿泥石以绿泥石衬膜的形式出现对储层起到保护作用;碳酸盐含量低,物性较好,碳酸盐含量高,物性则差。交代作用、溶解作用也是本地区部分井段物性较好的原因之一。
The discrepancy of physical property of Chang 3 reservoir in Heshui area,Ordos basin are researched using physical property,Reservoir petrological,sedimentary microfacies,diagenesis.The result show that Chang 3 reservoir's physical property is low,but partly is relatively high-porosity and permeability.The reasons of the discrepancy is:①The contents of quartz in clastic constituents play a part role,the contents of quartz is higher,the physical property is good,otherwise is bad.②In the distributary channel microfacies sedimentary microfacies,the physical property is relatively good,but sand dam of branch estuary sedimentary microfacies is relatively bad.③The diagenetic stages comprise compaction,kaolinite cementation,chlorite filling,siliceous cementation,damage the physical property of the reservoir.Chlorite graphragm protect the reservoir.The contents of carbonate play an important role,the contents of carbonate is lower,the physical property is good.The contents of carbonate is higher,the physical property is bad.The metasomatism functions and dissolve role is one of the reasons that partly interval is relatively high-porosity and permeability.
出处
《内蒙古石油化工》
CAS
2011年第9期141-145,共5页
Inner Mongolia Petrochemical Industry
关键词
储层物性差异
岩性
沉积微相
成岩作用
Discrepancy of Reservoir
Lithologic
Sedimentary Microfacies
Diagenesis
