现代试井分析中关于负表皮效应问题的研究

本文研究了现代试井分析中的负表皮效应问题。Agarwal考虑到均匀微可压缩流体在均质地层中渗流具有井筒存储及表皮因子的影响,得出渗流解析解。本研究是通过扩大井筒半径的影响,对Agarwal解析解进行数值积分,获得不同的负表皮效应参数的大量数据及表皮效应小于零的各参数的数据表,并绘出理论图版。补充了 Gringarten 理论图版关于负表皮效应值的内容,为研究钻井与完井过程中油层污染状况以及油井压裂、酸化等增产措施效果提供了分析依据。

STUDIES ON THE PROBLEM OF NEGATIVE SKIN EFFECT IN MODERN WELL TESTING

Numberical integrations are made for the Agarwal analytical solution oi the flow equation of a homogeneous and compressible fluid with wellbore storage and skin effect in a uniform reservoir formation. A large number of data about negative skin effect factors and the tables of different parameters of skin effect below zero are obtained by the c'xtension of wellbore radius influence. These data were lacking for modern well testing. The work provides a basis for analyzing formation damage in drilling and completion and stimulation effects of fracturing and acidizing treatments, and also makes an improvement in Gringarten's type curves.