采用新标度方程预测再渗吸作用下天然裂缝性储集层重力泄油采收率  

Prediction of oil recovery in naturally fractured reservoirs subjected to reinfiltration during gravity drainage using a new scaling equation

作　　者：AGHABARARI Amirhossein GHAEDI Mojtaba RIAZI Masoud AGHABARARI Amirhossein;GHAEDI Mojtaba;RIAZI Masoud(Department of Petroleum Engineering,School of Chemical and Petroleum Engineering,P.O.Box 7193616511,Shiraz University,Shiraz,Iran;Reservoir Modeling and Simulation Center(RMSC),P.O.Box 7193616511,Shiraz University,Shiraz,Iran)

机构地区：[1]设拉子大学化学与石油工程学院石油工程系,伊朗设拉子7193616511 [2]设拉子大学油藏建模中心(RMSC),伊朗设拉子7193616511

出　　处：《石油勘探与开发》2020年第6期1212-1219,共8页Petroleum Exploration and Development

摘　　要：通过数值模拟对比单孔隙介质和双孔隙介质模型模拟结果,验证了再渗吸对天然裂缝性油藏的显著影响,提出了再渗吸作用下基质岩块泄油过程新的控制方程;利用检测分析,得到了适用于再渗吸作用下标度基质岩块采收率曲线的无因次方程;通过方案设计,针对具有不同岩石和流体性质的实验方案,确定了该方程的适用范围,并对各方案进行了模拟。结果表明,该方法可用于估算通过再渗吸进入基质岩块的原油量,有助于天然裂缝性储集层泄油过程的精确模拟,能够较准确地预测采油前期至中期再渗吸作用下基质岩块的采收率;新的标度方程可用于双重介质模型以提高采收率预测的准确性。By comparing numerical simulation results of single-porosity and dual-porosity models,the significant effect of reinfiltration to naturally fractured reservoirs was confirmed.A new governing equation was proposed for oil drainage in a matrix block under the reinfiltration process.By using inspectional analysis,a dimensionless equation suitable for scaling of recovery curves for matrix blocks under reinfiltration has been obtained.By the design of experiments,test cases with different rock and fluid properties were defined to confirm the scope of the presented equation.The defined cases were simulated using a realistic numerical simulation approach.This method can estimate the oil amount getting into the matrix block through reinfiltration,help simulate the oil drainage process in naturally fractured reservoirs accurately,and predict the recovery rate of matrix block in the early to middle periods of production.Using the defined scaling equation in the dual-porosity model can improve the accuracy of predicted recovery rate.

关 键 词：天然裂缝性储集层 重力泄油 再渗吸 标度方程 双重介质模拟 检测分析 

分 类 号：TE371[石油与天然气工程—油气田开发工程]