摘要
在应力敏感油藏的试井分析中,常岩石特性的假设对于确定传导率和储存系数可能引起较大的误差。研究了应力敏感地层中三孔三渗流动模型的压力响应,不仅考虑了储层的三孔三渗特征,而且考虑了井筒储集效应和应力敏感地层中介质的变形,引入了渗透率模数,建立了应力敏感地层三孔三渗流动的数学模型,渗透率依赖于孔隙压力变化的流动方程是强非线性的,因而采用数值方法求解数学模型,并探讨了变形参数和三重介质参数变化时压力的变化规律,给出了典型的压力曲线图板,这些结果可用于试井分析。
The assumption of constant rock properties in well test analysis of stress-sensitive reservoirs often caused significant errors in determination of reservoir transrnissibility and storativity. To overcome this problem, this paper studies the pressure response of a triple porosity and triple permeability media that is stress-sensitive, and takes into account the triple porosity/triple permeability feature of oil reservoir, the influence of borehole storage and the deformation of medium in stress-sensitive reservoir. Introducing the permeability modulus, this paper develops the mathematical model of the deformation triple porosity/triple permeability medium. The dependence of permeability on pore pressure makes the flow equation strongly nonlinear; hence the solutions of the mathematical models are obtained by numerical method. The changing of pressure with the variation of deformation parameters and triple-porosity parameters are discussed, and the typical pressure curves are plotted. These results can be applied to well test analysis.
出处
《工程力学》
EI
CSCD
北大核心
2008年第10期103-109,共7页
Engineering Mechanics
基金
国家863项目(2006AA06Z236)
山东省自然科学基金(Y2007F13)
关键词
变形介质
三孔三渗模型
渗透率模数
数值解
压力曲线图版
井筒储集
deformed medium
the triple porosity/triple permeability model
permeability modulus
numerical solution
the plots of pressure variation
borehole storage
