不同基质-裂缝耦合模式下致密油生产动态特征  

Dynamic characteristics under different matrix-fracture coupling modes in tight oil reservoirs

作　　者：魏漪[1] 徐婷[1] 钟敏[2,3] 秦学杰[1] WEI Yi;XU Ting;ZHONG Min;QIN Xuejie(Petroleum Exploration&Production Research Institute,SINOPEC,Beijing City,100083,China;School of Management,China University of Mining&Technology(Beijing),Beijing City,100083,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing City,100083,China)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国矿业大学(北京)管理学院,北京100083 [3]中国石油勘探开发研究院,北京100083

出　　处：《油气地质与采收率》2018年第2期83-89,95,共8页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"中西部盆地页岩油勘探开发目标评价"(2016ZX05049-006)

摘　　要：针对致密油生产动态特征复杂、单井产能差异大的特点,基于不同孔缝介质并存的致密油储层特征,研究多重介质耦合下的流动机理,结合地震解释、测井分析和岩心薄片等静态资料,基于裂缝类型、尺度和发育程度的变化,将致密油储层储渗模式划分为多级裂缝-孔隙型、大裂缝-孔隙型、微裂缝-孔隙型和孔隙型4种类型,不同储渗模式具有不同的孔缝介质组合类型,表现出不同的渗流特征和产能特征。利用油藏工程和数值模拟方法,结合动、静态资料,揭示出各类储渗模式下油井的生产动态特征。对比分析得出,只有当不同尺度的大裂缝和微裂缝组成复杂缝网时,储层出油能力最强。针对不同储渗模式,应采用合适的储层改造方式,使天然裂缝与人工压裂裂缝形成缝网,有效沟通基质,在增加初期产量和产量规模的同时,增大基质的动用程度,提高致密油采出程度。According to the complex production performance and great productivity difference of individual well in the tight oil reservoir,the flow mechanism under coupling of multiple media was researched based on the reservoir characteristic of the presence of different types of pore and natural fracture.The storage-percolation modes of the tight oil reservoir were di-vided into four types based on various fracture types,scales and development degree combined with static data of seismic interpretation,well logging analysis and core slice,which are multi-scale fracture-pore type,macro-fracture-pore type,mi-cro-fracture-pore type and pore type.Different storage-percolation modes have various pore-fracture coupling modes with various flow characteristics and productivity characteristics.By means of reservoir engineering and numerical simulation,the performance characteristics under different storage-percolation modes were analyzed based on the static and dynamic data.The comparison of the results shows that the well productivity would be the highest when large and micro fractures with different scales form the complex fracture network.Suitable reservoir reformation mode should be adopted according to various storage-percolation modes.Natural fractures and artificial fractures may form fracture network and the matrix may be connected effectively.The producing degree of the matrix and the recovery degree of the tight oil reservoir may be in-creased when the initial production and production scale were increased.

关 键 词：致密油 裂缝 基质孔隙 储渗模式 动态特征 

分 类 号：TE331.1[石油与天然气工程—油气田开发工程]