摘要
基于油田实测相对渗透率数据的统计分析,提出了高含水饱和度下油水相对渗透率比值与归一化含水饱和度间的新型函数表达式,实现了对常规相对渗透率比值关系曲线后段较为精确的拟合。利用新型油水相对渗透率比值表征关系式,结合油藏工程方法推导出两种适用于油田开发特高含水阶段(含水率大于90%)的新型水驱特征曲线。分别采用五点井网数值模拟结果和羊二庄油田、柳赞油田某区块实际生产数据,对新型水驱特征曲线的实用性进行了验证,结果表明,在甲型或乙型水驱特征曲线发生上翘以后,新型水驱特征曲线较常规水驱特征曲线的预测误差小,可用于预测特高含水阶段的油田生产动态、确定最终采收率以及可采储量。
A function expression of the oil-water relative permeability ratio with normalized water saturation at high water saturation was proposed based on statistics of measured oil-water relative permeability data in oilfields. This expression fits the later section of conventional relative permeability ratio curve more accurately. Two new water drive characteristic curves at the ultra-high water cut stage（fw90%） were derived by combining the new oil-water relative permeability ratio expression and reservoir engineering method. Then, the numerical simulation results of five point well pattern and production data of Yangerzhuang Oilfield and Liuzan Oilfield were used to verify the adaptability of the new water drive characteristic curves. The results showed that the new water drive characteristic curves are more accurate than conventional water drive characteristic curves after A type and B type water drive curves rise, and can be used to predict production performance at ultra-high water cut stage, ultimate recovery efficiency and recoverable reserves.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2017年第6期955-960,共6页
Petroleum Exploration and Development
基金
国家科技重大专项(2016ZX05010-003)
中国石油天然气股份有限公司"高/特高含水油田改善水驱效果关键技术"项目(2016B-1202)
关键词
水驱开发
特高含水期
水驱特征曲线
可采储量
water flooding development
ultra-high water cut stage
water drive characteristic curve
recoverable reserves
