黔南拗陷独山上司组储层特征及主控因素  

Reservoir characteristics and controlling factors of Shangsi Formation in Dushan,South Guizhou sag

作　　者：王文楷[1] 侯明才[1] 林良彪[1] 李刚[1] 

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059

出　　处：《成都理工大学学报（自然科学版）》2011年第2期229-235,共7页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家重大专题(2008ZX05005);全国油气资源战略选区调查与评价项目(XQ-2007-01)资助

摘　　要：通过大量的铸体薄片、物性测试、扫描电镜等资料,对黔南拗陷独山甲刀寨下石炭统上司组储层特征和主控因素进行深入分析。认为上司组储集岩以泥微晶灰岩、粉晶白云岩为主,次为亮晶生物碎屑灰岩及云质灰岩。上司组经历了由混积陆棚向开阔碳酸盐台地演化的环境转变。通过对上司组储层的物性资料分析和薄片观察发现,其储集空间类型以裂缝为主,次为粒间(内)溶孔、晶间(溶)孔,属低孔低渗储层。成岩作用对储层的发育起着决定性的作用,经过压实作用、胶结作用及重结晶作用以后,上司组储层原生孔隙已破坏殆尽,而后期白云石化作用、溶蚀作用及构造破裂作用形成的次生孔、缝,使储层的储集性能得到了极大的改善。The reservoir rocks in Shangsi Formation of Lower Carboniferous in Jiadaozhai of South Guizhou sag are marlstones and crystal powder dolomites,followed by bioclast limestones and dolomitic limestones.The sedimentary environment of Shangsi Formation is from the mixed continental shelf to the open carbonate platform.Based on the slice observation and physical properties of the reservoir in Shangsi Formation,this article indicates that the main reservoir spaces are fractures,followed by intergranular（intragranular） dissolved pores and intercrystalline（dissolved） pores.It is a fractured-porous reservoir with low porosity and low permeability.The development of the reservoir is determined by diagenesis.The cementation,compaction and recrystallization have destroied most original pores,and late-stage dolomitization,dissolution and tectonic disruption have formed many secondary pores and fractures.Because of these,the performance of the reservoir is promoted immensely.

关 键 词：储层特征 控制因素 上司组 黔南拗陷 

分 类 号：P588.245[天文地球—岩石学]