三重介质低渗油藏压力响应特征  

The Pressure Response Feature of Low Permeability and Triple-media Reservoirs

作　　者：刘洪[1] 王新海[1] 杨锋[1] 胡治华 

机构地区：[1]油气资源与勘探技术教育部重点实验室(长江大学),湖北荆州434023 [2]中海油田股份有限公司天津分公司,天津300452

出　　处：《石油天然气学报》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)

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.

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 

分 类 号：P618.13[天文地球—矿床学]