油气地质与采收率2017，Vol.24Issue(5)：58-63,6.
利用径向积边界元方法计算动态逆向渗吸累积采收率
Using the radical integration boundary element method to calculate cumulative recovery efficiency of dynamic counter current imbibition
摘要
Abstract
Due to the use of staged or volume fracturing technology in the area of ultra-low permeability or tight reservoirs,the area around the horizontal well will form a complex fracturing network and the oil reservoirs are divided into matrix blocks with different shapes,and the fracturing fluid or water will contact with the matrix blocks in a large area when flowing in fractures.Dynamic counter current imbibition will occur and is dominant in the mass transfer process between matrix and fracture under the capillary force.In order to simulate dynamic counter current imbibition properly,the radical integration boundary element method (RIBEM) was used.A mathematical model suitable for the counter current imbibition was established.By comparing the result of RIBEM simulation with those of differential method,numerical calculation,experimental data and analytical solution,the accuracy of the model was proved.This method is suitable for the calculation of cumulative recovery efficiency of a single matrix block with complex shape.Compared to traditional differential method,RIBEM does not need to divide network in the matrix block and the calculation process becomes easy,efficient and more suitable to the practice.关键词
裂缝性油藏/逆向渗吸/径向积边界元/超低渗透油藏/致密油藏/双重介质/数值模拟Key words
fractured reservoir/counter current imbibition/radical integration boundary element method (RIBEM)/ultralow permeability oil reservoir/tight oil reservoir/dual media/numerical simulation分类
能源科技引用本文复制引用
徐中一,程林松,曹仁义,顾浩,贾品,吴九柱,张翠萍..利用径向积边界元方法计算动态逆向渗吸累积采收率[J].油气地质与采收率,2017,24(5):58-63,6.基金项目
国家自然科学基金项目“致密储层流-固相互作用机制及非线性渗流模型”(51674273),国家“973”计划“陆相致密油高效开发基础研究”(2015CB250902). （51674273）
