分形合采油藏试井分析解的相似结构  

SIMILAR STRUCTURE OF PRESSURE DISTRIBUTION IN THE FRACTAL MULTILAYER RESERVOIR

作　　者：朱维兵[1] 李顺初[1] 徐昌学[2] 

机构地区：[1]西华大学,610039 [2]中国石油天然气管道科学研究院

出　　处：《钻采工艺》2008年第3期67-69,72,共4页Drilling & Production Technology

基　　金：国家“九五”重点科技攻关项目(96-111-03-01-07)。

摘　　要：针对分形合采油藏,建立了考虑井筒储集、表皮效应和三种外边界(无穷大、定压、封闭)条件下的试井分析模型;利用Laplace变换,在Laplace空间中得到了储层压力和井底压力分布的精确解;经深入分析,发现描述该类油藏在三种外边界条件下的渗流特征的解式之间具有的相似结构,并作了进一步的讨论。研究成果能方便试井分析软件的编制,对油气藏渗流规律的理论研究也具有指导意义。This paper established mathematic model for well test analysis of perfectly describing the fractal multilayer reservoir with the bottom-hole storage and the skin effects and the three kinds of outer boundary conditions (infinite boundary, constant pressure outer boundary, closed boundary). By using the Laplace transform method, the solution of the dimensionless pressure and dimensionless bottom-hole pressure in Laplace space is got. It is discovered to the solution's similar structure in the three kinds of outer boundary conditions passing through analyzing its characteristics. Furthermore, more discussion is taken. The research is convenient to design well test analysis program, and it has direction meaning for the research on percolation theory in porous media.

关 键 词：分形合采油藏 井筒储集 表皮效应 外边界爷件 LAPLACE空间解 相似结构 

分 类 号：TE353[石油与天然气工程—油气田开发工程]