摘要
P油田为多层砂岩油藏,采用防砂完井方式生产,目前进入中高含水期,油井产液规律与常规油田开发不同,多数油井投产后产液下降,少数油井投产后产液量稳定或随着含水升高而增加,对油藏数值模拟拟合与开发指标预测有很大影响。通过油田100多口油井的产液规律分析,认为井筒附近可移动微粒含量是影响产液规律的主要因素。为了在数模中表征这种现象,通过对油井月平均产液指数标准化和累积产液标准化,结合油井射孔段不同的可移动微粒平均含量,进行大数据统计分析,回归建立无因次产液指数变化倍数、累积产液和可移动微粒含量的关系公式。新方法应用于油藏数值模拟的历史拟合和预测,大幅改善了拟合和预测精度。
The P Oilfield is a multi-layer sandstone reservoir,which is produced by the sand control completion method,and is now entering the medium to high water cut period.The liquid production law of oil wells is different from conventional oilfield development,with most wells producing decreasing fluid after production,and a few wells producing stable fluid or increasing with increasing water cut after production,which has a great impact on the numerical simulation fitting and development index prediction of the reservoir.Based on the analysis of the liquid production law of more than 100 oil wells in the oilfield,it is concluded that the content of movable particles near the wellbore is the main factor affecting the liquid production pattern.To characterize this phenomenon in the numerical model,a large data statistical analysis was performed by normalizing the monthly average fluid production index and cumulative fluid production of the wells,combining different average contents of movable particles in the perforation section of the wells,and regressing to establish the relationship formulas of non-dimensional liquid production index decline times,cumulative liquid production and the movable particle content.The new method was applied to the historical fitting and prediction of reservoir numerical simulation,which greatly improves the fitting and prediction accuracy.
作者
赵靖康
安玉华
李媛婷
王刚
刘建华
ZHAO Jingkang;AN Yuhua;LI Yuanting;WANG Gang;LIU Jianhua(Bohai Oil Research Institute of CNOOC Tianjin Branch Company,Tianjin 300452,China)
出处
《复杂油气藏》
2023年第2期191-194,共4页
Complex Hydrocarbon Reservoirs
关键词
井筒堵塞
数值模拟
可动微粒含量
采液指数
wellbore blockage
numerical simulation
movable particle content
liquid production index
