复合油藏压力分布研究

Research of Composition Reservoir Pressure Distribution

李顺初,黄炳光,李晓平,张普斋

Li Shunchu ,Huang Bingguang, Li Xiaoping, et al

西南石油学院

Southwest Petroleum Institute , Nanchong 637001 , Sichuan , P. R. China

针对复合油藏,研究了3 种外边界条件(无穷大、封闭、定压) 及2 种内边界条件(即在井底是否考虑井筒储存和表皮效应) 下的变(常) 流率问题的储层内各区域的压力分布和井底压力的Laplace 空间解,在深入剖析了解的结构的基础上,归纳出了一个统一的通式,找出了储层内、外区域内的压力分布和井底压力间的相互关系,并简要地分析了与其他类型油藏的联系。此项研究,无疑是对试井分析理论的一种完善,对相应的试井分析软件的研制更具有深远的应用价值。

The research of this paper based on composite reservoir. It presents the Laplace space solution of variable ( constant) flow problem to reservoir pressure distribution and well bore bottom pressure distribution with three outer boundary conditions —constant pressure , closed and infinite —and two inner boundary conditions , which is to say whether the effect of wellbore storage or skin factor is taken into consideration. Furthermore , a general formula is concluded through careful analysis of the solution structure. This general formula describes the connection between bottom pressure and pressure distribution in reservoir peripheral scope and internal areas. It’s no doubt that the work in this paper has much meaning to corresponding well test analysis software designing , and makes the well test analysis theory more perfect than before.