摘要
调查半径在试井设计和试井分析中有着重要作用。针对碳酸盐岩储层含有溶洞的特征,建立了该类储层的渗流模型,应用边界元方法对渗流模型进行数值求解,得到了该类储层中调查半径随时间变化的规律,分析了溶洞对地层调查半径的影响。结果表明,对于含有溶洞的碳酸盐岩储层,不能简单地套用均质地层调查半径公式,因为靠近溶洞方向时,溶洞对调查半径的影响较大。文中所建立的调查半径计算方法可以用来估算溶洞离井的距离,可为油田制定合理的开发方案提供指导。
Investigation radius plays an important role in well test design and well test analysis. According to the characteristics of the medium containing caves in carbonate reservoir, the percolation model of carbonate reservoir is established and done numerical solution using the boundary element method, obtaining the change law of investigation radius with time. The effect of karst cave on investigation radius is analyzed. Results show that in carbonate reservoir with karst cave, the formula of investigation radius can not be simply applied in homogeneous formation. The influence of karst cave on investigation radius is great in the direction near the karst cave. The established calculation method of investigation radius can be used to estimate the distance from cave to well, which can provide guidance significance for formulating the reasonable oilfield development plan.
出处
《断块油气田》
CAS
2014年第3期352-355,共4页
Fault-Block Oil & Gas Field
基金
国家科技重大专项"低渗
特低渗透油气田经济开发关键技术"(2011ZX013)
