相渗曲线对油水两相流数值试井曲线的影响  

INFLUNCE OF THE RELATIVE PERMEABILITY CURVE ON NUMERICAL WELL TEST CURVE OF OIL-WATER-PHASE FLOW

作　　者：向祖平[1] 张烈辉[1] 陈辉[2] 徐冰青[3] 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室.西南石油大学,四川成都610500 [2]大港油田集团井下技术服务公司 [3]西南石油大学石油工程学院

出　　处：《西南石油大学学报（自然科学版）》2007年第4期74-78,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中国石油天然气集团公司石油科技中青年创新基金项目(04E7047);高等学校优秀青年教师教学科研奖励计划(TRAPOYT);教育部博士点基金(20040615004)。

摘　　要：地层岩石相对渗透率的变化会影响地层中油水的流动,因此对试井曲线形态的影响也很大。用数值试井方法研究了不同相渗曲线对试井曲线的影响,采用PEBI网格技术,给出了在PEBI网格下油水两相流动控制方程的离散形式,并耦合了井筒存储和表皮系数公式,得到了压力降落数值试井问题的产量模型。不同相渗曲线经数值试井模型计算并对比发现,油相相对渗透率的降低或增加,引起地层压力变化的幅度及速度也增加或降低,因此试井曲线也相应地上抬或下掉。对油田的生产具有指导意义。It is well known that the change of the rock relative permeability will effect on oil and water flow in the formation, therefore, the change will greatly effect on the shape of well test curve. In this paper, a numerical well test method is presented to study the influnce of different relative permeability curves on the well test curve, PEBI grid is used to discretize control equations of oil-water-phase flow in FEBI grid, which couples the wellbore storage and skin effect into account. The flow model for pressure drawdown well test is derived. According to comparing and analyzing the result calculated by numerical well test model pointing to different relative permeability curves, it is shown that the relative permeability of oil phase drawing down or building up will lead to the change scope and velocity of bottom-hole pressure correspondingly increasing or reducing, consequently, well test curves will warp up or drop down.

关 键 词：油水两相流 数值试井 黑油模型 PEBI网格 相渗曲线 

分 类 号：TE319[石油与天然气工程—油气田开发工程]