非均质碳酸盐岩油藏油水两相流动模拟  

Numerical Simulation of Water Flooding Development of Heterogeneous Carbonate Reservoir

作　　者：吕心瑞[1] 黄朝琴[2] 赵娟 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石油大学(华东)石油工程学院,山东青岛266555 [3]中海油研究总院,北京100029

出　　处：《西安石油大学学报（自然科学版）》2016年第4期75-81,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项"碳酸盐岩油田开发关键技术"(编号:2011ZX05014)

摘　　要：为了模拟考虑非均匀基质情况下裂缝的特殊导流作用,采用离散裂缝模型结合有限体积方法进行多裂缝非均质碳酸盐岩油藏两相流动模拟研究,对裂缝显式降维处理,根据基质岩块非均质特征分区划分Delaunay三角网,以此为基础构建非均匀控制单元,采用有限体积法推导其数值计算格式,并基于IMPES方法进行求解。该方法避免了由于介质交界面处渗透率变化较大、利用标准有限体积方法产生不准确速度场的问题,实现了非均质碳酸盐岩油藏油-水两相流动模拟。最后通过算例验证了该方法的正确性,并开展了含复杂裂缝非均匀基质碳酸盐岩油藏水驱数值模拟研究,为此类油藏的开采提供参考依据。Most carbonate reservoir contains multi-scale fractures, and carbonate matrix has strong heterogeneity. In order to accurately describe the special flow guiding effect of the fractures in the heterogeneous matrix, the two-phase flow in the water flooding process of the heterogeneous carbonate reservoir with multi-scale fractures was simulated using finite volume method based on discrete fracture model. The model simplifies fracture by using （ n-1 ） -dimensional ceils in a n-dimensional domain, meanwhile the heterogeneity of ma- trix is considered. Delaunay triangulation subdivision is used in the whole research area, and then the inhomogeneous control volume cells are constructed based on the Delaunay triangulation. The numerical computational scheme is derived based on the finite volume method, and the equations are solved by IMPES method. The method avoids producing the inaccurate velocity field because of the great permeability change in the interface between different media using standard finite volume method. So the numerical simulation of the two-phase flow in the water flooding process of the heterogeneous carbonate reservoir is realized. At last the correctness of the theory and algorithm of the method is verified through examples. The numerical simulation of heterogeneous carbonate reservoir based on this method provides the reference for the development of this kind of reservoirs.

关 键 词：非均质碳酸盐岩油藏 离散裂缝模型 有限体积法 两相流动 数值模拟 

分 类 号：TE319[石油与天然气工程—油气田开发工程]