储层伤害室内评价方法的研究

从分析影响产能的因素着手，修正了油气层损害室内证件夺心伤害率ＤＲ的定义，确定了岩心伤害深度和伤害段岩心渗稼率的测定方法，并针地两种渗透率不同的岩心完善了梯度测量法和储层作害室内评价方法。

LABORATORY INVESTIGATION INTO EVALUATION OF FORMATION DAMAGE

In this paper a new defined damage ratio is used to evaluate the core damage using different muds. It could be demonstrated that the new defined damage ratio is an expedient value for the determination of a reliable extent of the damaged zone of the tested core. A procedure for formation damage testing is developed covering the test methodology and result calculation. The core flow apparatus is improved for the measurement of the pressures along the core axis. Both four types of mud and two types of sandstone core are used in the experiments.