超前注水开发指标变化规律及跟踪调整研究  

Research on Change Regulation of Development Index and Tracked Adjustment of Advanced Injection

作　　者：宋国亮 李冀欣 张承丽[3] SONG Guo-liang;LI Ji-xin;ZHANG Cheng-li(College of Mathematics and Statistics,Northeast Petroleum University,Daqing 163318,China;Operation Area of Chenghao,PetroChina Changqing Oilfield Company Oil Production Plant NO.2, Qingyang 745000,China;School of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学数学与统计学院,黑龙江大庆163318 [2]中国石油长庆油田分公司第二采油厂城壕作业区,甘肃庆阳745000 [3]东北石油大学石油工程学院,黑龙江大庆163318

出　　处：《数学的实践与认识》2019年第1期124-128,共5页Mathematics in Practice and Theory

基　　金：国家自然科学基金(51504069)

摘　　要：X区块为低渗透油藏,目前采用超前注水开发方式,在数值模拟历史拟合的基础上对试验区超前注水开发指标的变化规律进行研究,并对注采系统进行调整.通过相对渗透率曲线,得到无因次采液指数与含水率之间的变化规律,结果表明,含水率低于65%时,无因次采液指数呈下降趋势,可适当降低注水强度;当含水率达到65%以后,无因次采液指数开始上升,此时可通过放大生产压差对试验区进行提液生产;而含水率达90%以后,无因次采液指数迅速上升,此时应以稳油控水为主.在确定产液量的基础上,在下降期和上升期分别设计了四个方案进行注水强度调整,结果表明,在无因次采液指数下降期和上升期,当注水强度分别为1.65 m^3/d·m和2.10m^3/d·m时,地层压力保持较好,且试验区开发效果最好.Block X is a low permeability reservoir, and it is currently developed in the way of advanced injection. In this paper, the change regulation of the development index and adjustment of the injection production system of advance injection in the test region are researched on the basis of numerical simulation history matching. Change regulation between the dimensionless liquid production index and the water content is obtained according to the relative permeability curve. The result show that the dimensionless recovery index decline when the water content is below 65%, the water injection intensity can be reduced properly at this time, the index begins to rise when the water content is 65% later, the development can be conducted by increasing drawdown pressure at this time and the index rise rapidly when the water content is higher than 90%, stabilizing oil production and controlling water cut can be made mainly. Four schemes are designed to adjust the water injection intensity respectively in the decline and rise period on the basis of determining liquid production. The result show that formation pressure is better and development effect is the best when the water injection intensity respectively were 1.65 m^3/d·m and 2.10 m^3/d·m for the decline and rise period.

关 键 词：超前注水 数值模拟 无因次采液指数 注水强度 提高采收率 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]