塔里木盆地英买力地区奥陶系储层特征及主控因素研究

摘要

塔里木盆地英买力地区奥陶系碳酸盐岩油气成藏条件优越。该地区一间房组和鹰山组为优质储层分布的主要层位，储层分布具明显差异性。通过岩心，薄片，测井及分析测试等资料对该地区奥陶系碳酸盐岩储层进行分析。结果表明，英买力地区一间房组岩性主要为滩相泥晶颗粒灰岩及亮晶颗粒灰岩，鹰山组岩性为泥晶灰岩和颗粒灰岩交互分布。储层储集空间以构造裂缝和孔洞为主，储层类型主要为孔洞-裂缝型和裂缝型。沉积相带控制了原始沉积的物质基础，构造作用、埋藏溶蚀连同大气淡水溶蚀等多种建设性成岩作用使研究区内台内滩储集体和礁滩储集体的连通性增强，储集空间增大，便于形成较好储层，溶蚀作用和构造运动是控制储层发育分布的关键因素。%Ordovician carbonate oil and gas reservoir forming conditions is superior in Yingmaili region.Yijianfang and Yingshan Formation as the main quality reservoir horizon,the distribution of reservoir has obvious difference. Through the cores,flakes,logging and testing data,this article analized the Ordovician carbonate rock reservoir.The results shows that it is mainly flat sparry grain limestone and argillaceous limestone particles in Yijianfang Formation,grain limestone and micrite interactive distributed in Yingshan Formation.The reservoir space is mainly structural cracks and holes,the reservoir type is mainly pore fracture type and fracture type.Sedimentary facies belt control material basis,contemporane-ous period atmospheric fresh water dissolution,burial dissolution and tectonic action made reservoir connectivity well,res-ervoir space increases,forming good reservoirs.Dissolution and tectonic movement is the key factors of the reservoir’s distribution.