Modeling CO_2 miscible flooding for enhanced oil recovery

查看全文 作　　者：Ju [1,2]Binshan;Wu Yu-[3]Shu;Qin [4]Jishun;Fan [1,2]Tailiang;Li [1,2]Zhiping

机构地区：[1]School of Energy Resources,China University of Geosciences(Beijing),Beijing,100083,China;[2]Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism,Ministry of Education,ChinaUniversity of Geosciences(Beijing),Beijing 100083,China;[3]Colorado School of Mines,USA;[4]PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China

出　　处：《Petroleum Science》索引2012年第9卷第2期,共7页

基　　金：Parts of this work were supported by the National Science and Technology Major Projects (2011ZX05009-002, 2011ZX05009–006);the Fundamental Research Funds for the Central Universities, the Project-sponsored by SRF for ROCS, SEM, and the joint research on 'Investigation of Mathematical Models and Their Applications for Oil, Water and CO2 Flow in Reservoirs' between Colorado School of Mines, U.S.A and PetroChina Research Institute of Petroleum Exploration & Development (RIPED), CNPC, China 摘　　要：The injection of fuel-generated CO2 into oil reservoirs will lead to two benefits in both enhanced oil recovery (EOR) and the reduction in atmospheric emission of CO2. To get an insight into CO2 miscible flooding performance in oil reservoirs, a multi-compositional non-isothermal CO2 miscible flooding mathematical model is developed. The convection and diffusion of CO2-hydrocarbon mixtures in multiphase fluids in reservoirs, mass transfer between CO2 and crude, and formation damages caused by asphaltene precipitation are fully considered in the model. The governing equations are discretized in space using the integral finite difference method. The Newton-Raphson iterative technique was used to solve the nonlinear equation systems of mass and energy conservation. A numerical simulator, in which regular grids and irregular grids are optional, was developed for predicting CO2 miscible flooding processes. Two examples of one-dimensional (1D) regular and three-dimensional (3D) rectangle and polygonal grids are designed to demonstrate the functions of the simulator. Experimental data validate the developed simulator by comparison with 1D simulation results. The applications of the simulator indicate that it is feasible for predicting CO2 flooding in oil reservoirs for EOR. 关键词：二氧化碳混相驱原油采收率 CO2混相驱二氧化碳排放量非线性方程系统不规则网格建模数学模型

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Modeling CO_2 miscible flooding for enhanced oil recovery

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