新型油气两相有限体积IMPES数值试井模型算法  

A Finite Volume IMPES Algorithm for Numerical Well Testing of Oil-Gas Two-Phase Flow

作　　者：赵立安[1] 史乐[2] 钟彩霞[1] 杨龙 李尧 ZHAO Li'an;SHI Le;ZHONG Caixia;YANG Long;LI Yao(Well Testing Company,PetroChina Dagang Oilfield Company,Tianjin 300280,China;The Second Oil Production Plant,PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834008,China;Xi'an Sinoline Petroleum Science&Technology Co.,Ltd.,Xi'an,Shaanxi 710065,China)

机构地区：[1]中国石油大港油田测试公司,天津300280 [2]中国石油新疆油田公司采油二厂,新疆克拉玛依834008 [3]西安华线石油科技有限公司,陕西西安710065

出　　处：《西安石油大学学报（自然科学版）》2020年第5期60-64,共5页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：陕西省创新能力支撑计划项目“油气田开发知识应用平台OGKAS”(2017KTPT-30)。

摘　　要：在油气两相流数值试井中对数值模型求解常用的线性化方法为IMPES方法(隐压显饱法),该方法由于显式求解饱和度,导致计算稳定性差,对时间步长要求较高,实际应用效果不好。采用一种新型的有限体积IMPES方法,考虑基于物质平衡原理,建立压力与油相饱和度关系,在隐式求解压力的基础上,利用压力和饱和度的关系求解油相饱和度,最后迭代计算出所有时刻的油气两相的压力及油气饱和度变化。通过与常规IMPES的计算结果对比可知,该方法的稳定性较好,并且计算简单,可以采用大步长,计算速度快,结果可靠,为两相流数值试井提供了一种可靠、便捷的求解方法。At present,IMPES(implicit pressure explicit saturation method) is a common linearization method for solving numerical model in numerical well testing of oil-gas two-phase flow.Due to the explicit solution of saturation,the method has poor stability,high requirement for time step and poor practical application effect.Therefore,a new finite volume IMPES method is proposed.Based on the principle of material balance,the relationship between pressure and oil saturation is established.On the basis of implicit calculation of pressure,oil saturation is solved according to the relationship between pressure and oil saturation.Finally,the pressure and saturation of oil and gas at all times are calculated iteratively.Compared with the calculation results of conventional IMPES method,this finite volume IMPES method has better stability,simpler calculation,larger step size,faster calculation speed and more reliable results,which provides a reliable and convenient solution method for two-phase flow numerical well testing.

关 键 词：油气两相流 数值试井 IMPES 物质平衡 有限体积法 

分 类 号：TE33[石油与天然气工程—油气田开发工程]