摘要
根据油气藏的渗流机理,在考虑有效井筒半径和井筒储集的基础上,建立了在变流率情形下的均质油藏不稳定渗流模型;利用Laplace变换,得到了变流率生产情形下的无因次储层压力和井底压力解;根据解的相似结构理论,找到不同外边界条件对应下的相似核函数,形成统一的相似结构解,为深入分析流体渗流特征提供了一个理论分析的新观点。研究给编制试井分析软件带来极大的便利,对油气藏渗流规律具有重要的意义。
Established is a seepage mathematical model for homogeneous reservoir,in which considered are effective wellhole radius,wellhole storage and three outer boundary conditions.By using Laplace transform,analytical solutions of reservoir pressure and bottom hole pressure are obtained in Laplace space in the case of variable flowrate production.It is found that there is similar structure among the solutions in the three outer boundaries according to the structural similar theory.The study results provide great convenience for well test analysis software preparation and are of significance to theoretical study on oil and gas reservoir seepage law.
出处
《天然气与石油》
2011年第2期40-42,7-8,共3页
Natural Gas and Oil
基金
国家科技重大专项资助项目(2008ZX50443-14)
西华大学应用数学重点学科资助项目(ZX00910-09-1)
西华大学创新基金(YCJJ200916)
关键词
均质油藏
有效井筒半径
变流率
相似结构
核函数
Homogeneous reservoir
Effective wellhole radius
Variable flow rate
Similar structure
Kernelfunction
