转向酸化技术综述

Summery on Diverting Acid Stimulation

钻井、生产或修井过程中,大多数井会发生伤害,即近井地带渗透率降低,影响产能。因此需要对其进行压裂或酸化等作业,以解除伤害,提高产能。本文详细介绍了二次伤害形成的原因及转向酸化的作用机理,同时介绍了常规转向酸化技术——机械转向和化学转向技术及国外转向酸化技术近几年的发展方向。

Most of wells would get damaged to different extent in the processes of drilling; production and work over, namely, the permeability near the wellbore would drop sharply to affect the PI of the well. So stimulations such as fracturing or acidizing is necessary to relieve the damage and improve the well productivity. In this paper, the formation of secondary damage and the mechanism of diverting acid stimulation are introduced particularly, and the conventional diverting acid stimulations（mechanical diverting and chemical diverting techniques）, as well as the development trend of diverting acid stimulation in recent years in the abroad are mainly introduced.