摘要
在大尺度缝洞型油藏数值模拟中,大尺度溶洞和裂缝不适合作为多孔连续介质。基于溶洞质量守恒建立了溶洞外流体流动满足达西定律、溶洞内部处处压力相等的耦合模型,利用直接边界元方法计算了井附近含大尺度溶洞油藏井底压力,绘制了压力双对数曲线,并研究了溶洞的大小及离井距离、窜流系数、储能比对井底压力响应曲线的影响。
In numerical simulation of large scale fracture-cavern reservoirs,the large scale fracture and cavern are not suitable to act as continuous porous media.On the basis of mass conservation,a coupling model has been built by assuming Darcy flow outside the caverns and all equal pressure inside the caverns.The bottom hole pressure of such reservoirs is calculated by using direct boundary element method;the log-log pressure curve is mapped;and the effects of cavern size and distance to well,interporosity flow coefficient and storativity ratio on bottom hole pressure are discussed.
出处
《特种油气藏》
CAS
CSCD
北大核心
2012年第2期79-81,139,共3页
Special Oil & Gas Reservoirs
基金
国家重大专项“低渗、特低渗透油气田经济开发关键技术”(2011ZX013)
关键词
缝洞油藏
数学模型
井底压力
溶洞
边界元
fracture-cavern reservoir
numerical model
bottom hole pressure
cavern
boundary element
