水平井储层损害的室内评价方法

针对水平井的特点.通过流动效率的计算.建立了钻井液对水平井锗层损害程度的室内评价方法.根据大量实验结果.提出了计算损害带半径的数学回归模型.使用该模型.并结合岩心受钻井液污染前后渗透率的测定,可计算出表皮系数.运用该方法系统地评价了大港油田女MH-01水平井的储层损害情况.

IN-HOUSE EVALUATION OF HORIZONTAL-WELL FORMATION DAMAGE

On the basis of the horizontal-well characteristics, the in-house method of evaluating formation damage was set up by calculating its flow efficiency. The mathematical regression model based on experimental data was established to calculate the radius of the affected zone around the borehole. The skin factor can be calculated by using this model and core sample permeability determinations before and behind contamination by drilling fluids core. The paper introduces the structure and application of the portable dynamic high-temperature and high-pressure dynamic filtration press. The formation damage of the Nu MH-01 horizontal-well in Dagang Oilfield was systematically estimated by using this method.