摘要
等效渗透率张量是裂缝性油藏渗流分析的重要参数,应用边界元算法可计算裂缝性油藏的等效渗透率张量。根据流量等效原理,考虑每条裂缝的空间分布和属性参数对流动的影响,建立了求解裂缝性多孔介质等效渗透率张量的数学模型,并给出了数学模型的边界元求解方法。实例研究表明,边界元法数值计算结果与解析结果较为一致;裂缝对介质的渗透能力有重要影响,忽略渗透率张量的非对角线元素将产生较大误差;等效渗透率张量能够反映裂缝性多孔介质的非均质性和各向异性。
Equivalent permeability tensors (EPTs) are essential parameters for the flow analysis in the fractured oil reservoirs,which can be calculated by boundary element method. Based on equivalent flow rate theory,the influence of spatial distribution and attribute parameters of each fracture was considered. Then a mathematical model of equivalent permeability tensors for fractured porous media was established,which could be solved with the boundary element method. The case study presents that the result of boundary element method and analysis is almost the same. The fractures have important influence on the permeable capacity of the media. Great error will occur if off diagonal elements of the permeability tensors are neglected. The equivalent permeability tensors can reflect the heterogeneity and nonisotropy of the fractured porous media.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2009年第6期80-83,共4页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项专题"离散裂缝网络油藏数值模拟技术"(2008ZX05014-005-03)
国家"973"项目"碳酸盐岩缝洞型油藏开发基础研究"(2006CB202404)
关键词
裂缝性油藏
等效渗透率张量
连续介质
边界元方法
周期边界条件
数学模型
fractured oil reservoirs
equivalent permeability tensor
continuous medium
boundary element method
periodic boundary condition
mathematical model
