多层油藏模型在稠油热采两区数学模型上的应用  

Application of Multilayer Reservoir Model to Mathematical Model for Two-Region Thermal Recovery

作　　者：刘振宇[1] 何金宝[2] 杨建平[3] 

机构地区：[1]大庆石油学院石油工程学院,黑龙江大庆163318 [2]辽河油田钻采工艺研究院,辽宁盘锦124010 [3]辽河油田SAGD开项目管理部,辽宁盘锦124010

出　　处：《新疆石油地质》2010年第3期297-299,共3页Xinjiang Petroleum Geology

基　　金：黑龙江省教育厅项目(GZ09A121)

摘　　要：稠油热采过程中普遍存在蒸汽超覆和蒸汽前缘倾斜现象,这对稠油油藏试井分析结果产生很大影响,使原来假设蒸汽前缘具有相同半径的热采两区模型不再适用。为了研究超覆作用对稠油油藏试井分析典型曲线的影响,引入了多层油藏模型,建立了考虑超覆的稠油热采两区模型,把稠油油藏理解成具有不同前缘半径的多层油藏,建立两区数学模型并进行求解,得到井底压力的拉氏空间解,经过数值反演得到考虑超覆的稠油热采两区模型试井典型曲线,并分析各参数对试井典型曲线的影响。此方法的好处在于避免了繁琐的数学推导过程,可以模拟蒸汽前缘为非直线时的情况,并可解决稠油油藏纵向上非均质性的问题。为解决稠油热采试井分析中超覆问题提供新思路。Common existence of steam overlay during thermal recovery process may create incline of the steam front,which is of great effect on well test analysis result for the heavy oil reservoir by causing the initial model in the condition of the same inner zone radius of the steam front will not be applicable.For this reason,this paper presents the multilayer reservoir two-region mathematical model for heavy oil thermal recovery considering the steam overlay effect.By this model,the Laplace space solution for bottom-hole pressure and well testing type curves are obtained,and the effect of each parameter on the type curves is analyzed.The multilayer model as new thought has the advantages of avoiding the complex mathematical derivation,simulating the nonlinear steam front and dealing with the vertical heterogeneity in such a reservoir.

关 键 词：稠油油藏 试井分析 超覆 热采 典型曲线 

分 类 号：TE312[石油与天然气工程—油气田开发工程]