摘要
建立了考虑裂缝渗流存在启动压力梯度三重介质低渗油藏数学模型,以低渗油藏调查半径为动边界,采用拉普拉斯变换得到拉普拉斯空间数学模型,对模型采用有限差分法离散求解得到井底压力,绘出了三重介质低渗油藏试井图版,并研究了不同启动压力梯度、基质储能比、溶洞储能比对三重介质低渗油藏试井曲线的影响。
Based on the mathematical model of low permeability and triple media reservoir,in which the starting pressure of fracture percolation was taken into account,the investigating radius of low permeability and triple media reservoirs was used as moving boundary,the Laplace transform was deployed to obtain its space mathematical model,a finite difference method was carried out.The wellbore pressure was calculated after Laplace transform and finite difference method to derive bottom-hole pressure,and well-testing chart of low permeability and triple media reservoir was plotted.After that the impact of changing starting pressure gradient,energy storage ratio of matrix and cave on well-test chart of low permeability and triple media reservoir is studied.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2011年第8期134-137,1,共4页
Journal of Oil and Gas Technology
基金
国家科技重大专项(2011zx013)
关键词
三重介质
低渗透油气藏
压力响应
拉普拉斯变换
有限差分法
triple media
low permeability reservoir
pressure response
Laplace transform
finite difference method
