启动压力梯度变化下低渗透油藏IPR影响因素的探讨——对《低速非达西渗流产能方程的建立》一文的商榷  

Discussion on influencing factors of IPR curve at varying entry pressure gradient in low permeability reservoir—Deliberation of the paper “Development of inflow performance relationships for Non-Darcy flow in low permeability reservoir”

作　　者：王厉强[1] 李彦[2] 杜洪荣[2] 寇根[3] 代翔[3] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,四川成都610059 [2]胜利油田胜利工程设计咨询有限责任公司,山东东营257026 [3]中国石油新疆油田公司勘探开发研究院,新疆克拉玛依834000

出　　处：《油气地质与采收率》2007年第2期78-80,116,共3页Petroleum Geology and Recovery Efficiency

摘　　要：利用所建立的低渗透油藏流入动态通式,在考虑启动压力梯度变化的基础上,对影响IPR曲线的因素进行了敏感性分析;并结合《低速非达西渗流产能方程的建立》一文的敏感性分析结果和结论进行了探讨。研究结果表明,泄油半径和地层压力的敏感性随启动压力梯度的变化而变化,而《低速非达西渗流产能方程的建立》文中所得结论,即泄油半径、地层压力对无因次流入动态曲线有较大影响,只在特定情况下才成立;此外,表皮系数并不像其文中所述对无因次流入动态没有明显影响,而是影响很大。With the change of entry pressure gradient being taken into ac-count , sensitivity of factors which influence the IPR curve is analyzed with the help of a universal dimensionless IPR equation. And discussions are given based on the results and conclusions form the paper ' Development of inflow performance relationships for Non ?Darcy flow in low permeability reservoir'. The research shows that the sensitivity of drainage radius and formation pressure varies with the change of the entry pressure gradient. The conclusion given in the paper above (drainage radius and formation pressure have great influence on dimensionless IPR curve) is true only at specific conditions. Furthermore, the study shows that skin factor exerts considerable influence on IPR curve, disagreeing with the conclusion given in the paper above.

关 键 词：低渗透 启动压力梯度 敏感性 IPR 表皮系数 

分 类 号：TE348[石油与天然气工程—油气田开发工程]