摘要
石臼坨凸起F油田沙一二段发育巨厚、低渗混积岩储层,岩性多样、孔隙结构复杂、纵向非均质性强,影响酸化层段选择。综合岩心、薄片、压汞曲线等资料,结合测井信息,对储层开展分类评价,分析储层可酸化改造的潜力并落实有利的酸化层段。结果显示,沙一二段储层包括鲕粒白云岩、生物白云岩、白云质砂岩、凝灰质砂岩、砂岩和灰质砂岩等6类岩性;根据岩石类型、物性及孔隙结构参数将储层整体划分为Ⅰ、Ⅱ、Ⅲ类,结合实际酸化作业效果,Ⅰ类储层可改造性最强,Ⅱ类次之,Ⅲ类最差。
1st and 2nd member reservoirs of Shahejie formation in oilfield F,Shijiutuo uplift,develop thick and low-permeability mixosedimentite reservoir,with multiple rock types,complex pore structures and serious vertical heterogeneity, which influence intervals selected to be acidified. Merging core, thin sections, and intrusive mercury curves, combing logging information, reservoirs are evaluated and classified, and reservoir acidification potential is evaluated for selecting good intervals to be acidified. It shows that 1 st and 2 nd member reservoirs of Shahejie formation consist of 6 rock types, oolitic dolomite, biological dolomite,dolomitic sandstone, tuff sandstone, regular sandstone and calcareous sandstone. Combing rock types, properties and pore structures, reservoir can be subdivided into 3 patterns, Ⅰ, Ⅱ,and Ⅲ. Calibrated by actual acidification effects, reservoir of pattern Ⅰ show the best effects of acidification, reservoir of pattern Ⅱ takes second place, reservoir of pattern Ⅲ is the worst for acidification.
作者
肖大坤
范洪军
王晖
胡晓庆
牛涛
张宇焜
陈飞
XIAO Dakun;FAN Hongjun;WANG Hui;HU Xiaoqing;NIU Tao;ZHANG Yukun;CHEN Fei(CNOOC Research Institute,Beijing 100028,China)
出处
《石油化工应用》
CAS
2020年第8期90-96,109,共8页
Petrochemical Industry Application
基金
国家科技重大专项课题“海上开发地震关键技术及应用研究”,项目编号:2011ZX05024-001
中海石油(中国)有限公司综合科研课题“储层不连续界限预测及应用研究—三角洲沉积储层类型”成果。
关键词
低渗储层
矿物组分
储集空间
孔隙结构
酸化改造
low permeability reservoir
mineral component
reservoir spaces
pore structure
acidification
