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超前注水主要是针对低渗透油藏开发出来的一项注水技术。它主要是在采油井投产之前就注水,从而使地层的初始压力得到了提高,以免其压力降低得太快而使油藏的渗透率下降,从而延长了油井的见水世界,使单井的产量大大提高,并且在一定程度上降低了综合递减率,使油田能够长期保持稳定的产量。此外,超前注水还能对指进现象进行有效预防,提高了油藏的采收率。本文主要介绍了超前注水技术的基本原理及作用,并对目前的一些应用情况进行了分析。
Leading water injection is mainly a water injection technology developed for low permeability reservoirs. It injects water mainly before the production well is put into operation, so that the initial pressure of the formation is raised, so as to prevent the pressure from lowering too fast and the permeability of the reservoir is reduced, thereby prolonging the world of water seepage, The output has been greatly increased, and to a certain extent, the comprehensive decline rate has been reduced, enabling the oil field to maintain stable output over the long term. In addition, advanced water injection can effectively prevent the fingering phenomenon and improve oil recovery. This paper mainly introduces the basic principle and function of advanced water injection technology, and analyzes some current applications.