大安油田主力区块微观孔喉结构特征及油水赋存状态规律研究  

Study on the Microstructure Characteristics of Pore Throat and the Status of Oil-water Occurrence in the Main Block of Da’an Oilfield

作　　者：姜丽娟 王春生[1] JIANG Li-juan;WANG Chun-sheng(Northeast Petroleum University,Heilongjiang Daqing 163318,China)

机构地区：[1]东北石油大学,黑龙江大庆163318

出　　处：《当代化工》2020年第2期432-436,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金,项目号:21076043。

摘　　要：基于大安油田储层连通性差、水驱控制程度低、水驱采收率偏低,并且单井产出低、产出端不畅通等问题,采用压汞实验、核磁共振与CT扫描数字岩心技术相结合的方法,分析了大安油田主力区块微观孔喉结构特征及油水赋存状态规律。研究结果表明:大安油田低渗透储层性质主要受喉道控制;储层岩心孔隙类型比较复杂,小孔隙所占体积比较大;大安油田的非均质性严重,而孔隙结构的非均质性影响岩心的油水赋存状态,并表现出剩余油在水驱前后分布形态的差异。According to poor reservoir connectivity, low degree of water flooding control, low water flooding recovery and single well output in Da’an oilfield, mercury injection experiment and CT scanning digital core technology were combined to analyze the microstructure characteristics of pore throat and the status of oil-water occurrence in the main block of Da’an Oilfield. The results showed that the properties of low permeability reservoirs in Da’an oilfield are mainly controlled by the throat. The pore types of reservoir cores are complex and small pores take up a large volume. The heterogeneity of Da’an oilfield is serious. And the heterogeneity of pore structure affects the status of oil-water occurrence of the core, and shows the difference in the distribution of residual oil before and after water flooding.

关 键 词：CT扫描 微观孔喉 非均质性 油水赋存状态 

分 类 号：P618.13[天文地球—矿床学]