缝洞型碳酸盐岩油藏数值模拟新方法  

MATHEMATIC MODEL FOR FLOW COUPLING OF CREVICE-CAVE TYPE CARBONATE RESERVOIR

作　　者：康志江[1] 

机构地区：[1]中国石化石油勘探开发研究院油藏所,北京100083

出　　处：《大庆石油地质与开发》2010年第1期29-32,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家“973”项目“碳酸盐岩缝洞型油藏数值模拟研究”（2006CB202405）.

摘　　要：缝洞型碳酸盐岩油藏与砂岩油藏不同，流体流动的介质由不同尺度的孔、缝、洞组成，用常用的达西流油藏数值模拟技术难以合理描述地下油水动力学特征。结合缝洞型油藏特征，提出了应用流动力学（N—S方程）与渗流力学（Darcy方程）耦合计算的两相流油藏数值模拟方法，洞穴、裂缝内流体流动应用N—S方程计算，溶蚀孔洞及微裂缝的组合体应用多孔介质Darcy方程计算，介质边界处理方法是根据方法边界的对称性质，提出了力学及流量平衡关系方程，模型计算结果通过实验对比得到验证。Due to differences between crevice-cave type carbonate reservoirs and sandstone ones, and the media for liquid flow composed of different-size pores, crevices and holes, the conventional Darcy flow reservoirs numerical simulation technique is difficult to reasonably describe the dynamic characteristics of underground oil and water. By integrating the features of crevice-cave type reservoirs, this paper proposes two-phase reservoir numerical simu- lation method by means of the coupliflg calculation between flow dynamics （ N-S Equation ）and filtration mechanics （ Darcy Equation） , the liquid flow in caves and crevices is calculated by the former equation , and on the contrary the complex bodies of solution pores ＆ caves and micro-fractures are computed by porous medium~ Darey Equation, the method to deal with medium boundaries is determined by the symmetry properties of equation borders, and the balanced relation equation between mechanics and flow rates is offered. The model calculation results are verified by experimental comparison.

关 键 词：缝洞型油藏 数值模拟 数学模型 复杂介质 

分 类 号：TE321[石油与天然气工程—油气田开发工程]