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油田进入特高含水开发阶段,无效注水循环严重。基础井网及一次加密井网以开采中高渗透层为主,注入水主要沿着厚油层各沉积单元的高渗透部位突进,随着注水倍数的增加,水洗厚度基本不增;注入水低效、无效循环严重,靠常规水驱层段细分调整技术无法深层次减缓层内和层间矛盾。为了改善开发效果,针对老区水驱井网开展深度调剖研究,采用铬微凝胶深度调剖体系对水驱油层进行深度调剖,并取得一定的效果。
Oilfield into the high water-cut development stage, invalid water cycle serious. The basic well pattern and the primary well pattern are dominated by medium and high permeable layers. The injected water mainly protrudes along the high permeable part of each sedimentary unit in the thick oil layer. With the increase of water injection rate, the washed thickness does not increase basically. The injected water is inefficient, Invalid cycle is serious, by subdividing conventional water flooding adjustment technology can not be deep-level layer and layer to reduce the contradiction between layers. In order to improve the development effect, aiming at the deep profile control of waterflooding well pattern in the old area, depth profile control of the waterflooding reservoir is carried out by using the depth profile control system of chromium microgel, and some effects are achieved.