考虑有机固相沉积的多组分数学和数值模型  

MULTI-COMPOSITIONAL MATHEMATICAL AND NUMERICAL MODEL TO CONSIDER ORGANIC SOLID PRECIPITATION

作　　者：张茂林[1] 梅海燕[1] 杜志敏[1] 李闽[1] 孙良田[1] 

机构地区：[1]西南石油学院

出　　处：《天然气工业》2004年第2期72-75,共4页Natural Gas Industry

基　　金："油气藏地质及开发工程国家重点实验室"开放基金资助项目 (PLN990 2 )

摘　　要：针对注气提高原油采收率过程中有可能出现的有机固相沉积问题 ,文章在提出改进多组分模型的补充假设条件之后 ,建立了三维四相 (油相、气相、水相和有机固相 )多组分数学模型 ;为完成油相、气相和有机固相的相平衡计算 ,还建立了考虑有机固相沉积、适合于地下油气藏烃类体系的三相相平衡热力学模型 ;运用计算机求解时 ,利用有限差分方法 ,按顺序求解法建立相应的隐式压力、显示组成及饱和度的数值模型 ;由此开发的数值模拟软件能够更好地进行实际油藏注气提高原油采收率方案设计研究 ,获得了具有生产实际指导意义的研究成果。The organic solid may precipitate from oil and gas system in gas injecting process to enhance oil recovery. With the supplementary hypothesis to improve the multiple component model, the mathematical model of 3 dimensions and 4 phases (oil, gas, water and organic solid) is set up. To conduct the phase equilibrium calculation, the phase equilibrium thermodynamic model of 3 phases, which can describe the organic solid precipitation of oil and gas system in the reservoir, is also established. Using the finite difference method, the related numerical model including the implicit pressure equation, explicit component equation and saturation equation is founded with the help of sequence solving method. The numerical simulation software, which is improved by using this theory, can better make the program for improving oil recovery factor by gas injection, and guide the more significant research results to guide real operation.

关 键 词：注气 有机固相沉积 多组分相 数值模型 相平衡 

分 类 号：TE319[石油与天然气工程—油气田开发工程]