二氧化碳驱油三相四组分一维解析解研究  

Analytical Solution for One-dimensional Four-component in Three Phases of CO_2 Displacement

作　　者：朱学谦[1] 周琦[2] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石化国际石油勘探开发有限公司,北京100083

出　　处：《中外能源》2015年第3期38-43,共6页Sino-Global Energy

基　　金：中国国家基础研究计划(973)项目"温室气体提高石油采收率的资源强化利用及地下埋存"(项目编号:2006CB705808)之课题"CO2防腐;结垢等工程技术方法"资助

摘　　要：多孔介质中多相流动与相行为之间的相互作用是决定油藏中多组分多相流动特征的重要因素,许多理论分析、数值模拟及室内实验研究结果都表明,非均质多孔介质中大流度比的混相过程中,黏性指进的作用十分重要。实际油藏中的流体流动一般为三相流动,目前已建立的关于三相流动的解析方法中涉及的组分仅是完全不混相的油组分、气组分和水组分,为此研究并建立了一种求解多孔介质中三相四组分一维注CO2混相驱过程的解析解模型。该模型利用几何学中的特征值方法来建立,并采用黎曼几何模型来描述含可动水岩心的注CO2混相过程,可以有效描述混相过程中流体黏度混合及黏性指进现象,更适用于我国陆相非均质性油藏的注CO2混相驱问题的研究。该模型可同时考虑无黏性指进或有黏性指进的不同情况。与数值模拟计算结果对比表明,解析解模型求解问题更快速准确。Interaction among phases of seepage in porous media is an important factor of determining flowing characteristics of multi-phases and multi-components in oil reservoirs.Many theoretical analysis,numerical simulation and laboratory experiments show that viscous fingering plays important role in the miscible process of big mobility ratio in heterogeneous and porous media.The fluid in actual oil reservoirs flows as three phases usually.Analytical solution for three phases now involves in separated oil component,gas component and water component completely.So a new analytical solution model of CO2 miscible flooding is researched and built for one dimensional,three-phase flow of four-component mixtures in the porous media using eigenvalue method among geometry.Riemannian geometry model is used for describing miscible process of CO2 injection in mobile water-bearing cores,which may describe viscosity mixture and viscous fingering of the fluid in the miscible process and especially be helpful for development in the heterogeneous continental reservoirs in China.The solutions with and without viscous fingering are considered together.Compared with numerical simulation results,the analytical solution model shows better computational accuracy quickly.

关 键 词：CO2驱 三相 四组分 黏性指进 解析解 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]