摘要
按储层特征和渗流特征,将缝洞双重介质模型分为三类,从数学角度简化成两类模型,即裂缝-基岩型和裂缝-孔洞型。前者采用Woren-Root等常规双重介质模型,后者需要建立缝洞系统的窜流公式才能进行数值模拟计算。根据缝洞的组合特征以及裂缝中的压力分布特征,推导了缝洞介质的窜流计算公式,并以商业软件ECLIPSE为基础,通过修改特定的关键字,实现缝洞双重介质模型的等效模拟。在此基础上,研究分析了缝洞双重介质的渗流特征:当窜流系数较低,单相流的双对数试井曲线出现凹形特征;当窜流系数足够大,单相流的曲线形态与单一介质相似,不出现凹形特征,但油水两相流动可导致油井的含水率出现阶梯状。
According to the characteristics of reservoir and the flowing through porous media,the fracture and vug dual-media models are grouped into three types,and they can be simpified into two types mathmatically,i.e.,fracture-matrix and fracture-pore.The conventional Woren-Roof dual-media model is used in the former,and in the latter,the channeling formula of fracture-vug system must be established to perform numerical simulation calculation.According to the characteristics of fracture-vug association and the pressure distridution in fractures,the channelling calculation formula for freacture-vug media is derived,and commercial software ECLIPSE is taken as example,the equivalent simulation of fracture-vug dual-media model is realized by adjusting the specified key words.Based on the result,the characteristic of flowing through porous media of fracture-vug dual-media are studied and analyzed,when the channelling coefficient is low,the log-log well test curve of single phase occures concave shape,and when the coefficient is large enough,the curve shape of single phase is similar to that of single media,no concave shape is shown,but the two-phase flow of oil and water can make water cut terrace-like shape
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第1期61-64,共4页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家“973”碳酸盐岩缝洞型油藏开发基础研究项目(2006CB214602)
