应用高压半渗透隔板法测得的毛细管压力数据评价地层伤害程度

EVALUATION OF FORMATION DAMAGE BY CAPILLARY PRESSURE DATA OBTAINED WITH HIGH PRESSURE SEMIPERMEABLE MEMBRANE METHOD

使用高压半渗透隔板法测得的毛细管压力数据在实验室内可以系统地评价地层伤害的程度。该方法是利用阈压的相对变化及毛细管压力和残余润湿相饱和度的变化,测定不同处理液对岩芯的伤害程度。该研究结果可用于实验室内筛选油田常用的钻井液、完井液与增产液系列和优选各种处理液的浓度。

This paper presents a method for evaluating formation damage by the use of capillary pressure data in laboratory obtained with the high pressure semipermeable-membrane. According to the relative variation of the pore entry pressure and the capillary pressure and residual wetting phase saturations, the damage in cores resulting from various treatment fluids was determined. The results can be used to screen drilling fluid, completion and stimulation fluids and can also be used to determine the optimum concentration of various treatment fluids in laboratory.