摘要
PB油田进入水驱开发中后期,在拟合系数R2>0.99前提下,利用不同水驱规律曲线预测得出不同的采收率,此时说明通过拟合系数R2难以确定水驱规律曲线类型。通过分析利用水驱规律曲线进行现场数据拟合的含水率曲线,得出预测采收率乙型>甲型>丙型>丁型的原因。利用水驱规律曲线预测时,实际上延续的后半段直线段的规律,故应利用开发后期预测的含水上升率对比进行选型。通过与现场实际含水上升率吻合程度以及误差分析确定区块适用甲型水驱规律曲线,预测采收率为44.82%,现场标定采收率为44.5%,预测误差小于0.8%。该水驱规律曲线选型方法对大庆油田及其他同类水驱油田采收率确定具有一定指导意义。
When the PB oilfield entered the middle and late stage of waterflooding development,under the premise of fitting coefficient R2>0.99,different recovery values were predicted by using different waterflooding curve,indicating that it was difficult to determine the type of waterflooding curve through fitting coefficient R2.Through analyzing the water cut curve fitted with the field data by using the waterflooding curve,the reasons for recovery rate predicted by type B>that predicted by type A>that predicted by type C>that predicted by type D were obtained.When the waterflooding curve was used to predict,the law of the second half of the straight line segment was actually continued,so the comparison of the water cut increasing rate predicted at the later stage of development should be used for selection.Through the analysis of the degree of coincidence with the actual water-cut increasing rate and error,the applicable A water flooding law curve of the block was determined,the predicted recovery rate was 44.82%,the field calibrated recovery rate in the field was 44.5%,and the predicted error was less than 0.8%.The model selection method of waterflooding curve has a certain guiding significance to determine the recovery rate of Daqing oilfield and other similar water drive oilfields.
作者
赵亮
赵秋胜
陈昊
李宜霖
杨云清
ZHAO Liang;ZHAO Qiu-sheng;CHEN Hao;LI Yi-lin;YANG Yun-qing(Department of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China;PetroChina Tarim Oilfield Company,Kuerle 841000,China)
出处
《当代化工》
CAS
2021年第3期652-655,660,共5页
Contemporary Chemical Industry
基金
黑龙江省自然科学基金面上项目,富含有机质变形介质页岩气储层流体渗流机理研究(项目编号:E2016008)。
关键词
采收率
甲型
开发后期
含水率
含水上升率
Recovery
A type
Late development stage
Water cut
Water cut increasing rate
