【摘要】 塔北地区奥陶系碳酸盐岩油气藏在很大程度上受岩溶型储层发育的控制,深入总结储层的岩溶作用类型及形成机制对油气勘探开发具有重要意义。通过对大量岩心、薄片、阴极发光、成像测井、地震及测试分析等资料的综合研究认为,原始沉积作用、岩溶作用和构造断裂作用是形成该区奥陶系碳酸盐岩岩溶储层的主要机制。其中,储层的原生孔隙和沉积相带是次生孔隙形成的基础;岩溶作用是控制储层发育的主要因素,(准)同生岩溶作用、层间岩溶作用、顺层岩溶作用、潜山岩溶作用、埋藏溶蚀作用是奥陶系岩溶储层发育的最主要成因,各种岩溶作用多期叠加、改造形成复合型优质岩溶储层;构造运动产生的裂缝是促进岩溶发育、控制储集体发育分布的关键因素。更多还原

【Abstract】 The carbonate karst reservoir in the Northern Tarim Basin was largely controlled by lithology,karstification and tectonic evolution. Based on core,normal thin sections,cast thin sections,cathodoluminescence,FMI,seismic and testing data,original sedimentation, karstification and tectonic disruption are thought to be the main mechanisms accounting for the formation of the carbonate karst res-ervoir in the Northern Tarim Basin. The primary pores and the sedimentary facies are the basic factors controlling the formation of secondary pores. Karstifications are the main factors controlling the reservoir development,that is,the penecontemporaneous karsti-fication,intra-strata karstification,along-strata karstification,buried-hill karstification,and burial dissolution all accounts. And, multiphase superimposed karstification is deformed to form the composite favorable dissolution reservoir. Fractures caused by the tectonic evolution are the key factors which accelerated the reservoir development and controlled its distribution.更多还原