埕北油田高含水后期稳产技术研究与实践

RESEARCH ON STABLE PRODUCTION TECHNIQUES IN THE HIGH WATER CUT STAGE OF CB OILFIELD

埕北油田位于渤海海域,是一个已有20多年开发历史的常规稠油油田,其主要开发层系为古近系东营组上段和新近系馆陶组。油田进入高含水阶段以后,为了充分利用地层天然能量充足的特点,提高油田产量,文章从油藏工程方法角度论证了埕北油田大泵提液的可行性,并对试验井次及适时提液方案进行了优选。通过实施优选方案,油田的含水率由提液前84%降低至80%,实施一年后累计增油11×104m3,油田产量得到了稳定和提升,开发效果得到改善,证实了油田通过提液实现稳产方案的可行性和有效性,对高含水油田后期开发有着一定的指导意义。

The CB oilfield locates in the Bohai bay,it is a viscous crude reservoir developed more than 20 years.After entering high water cut stage,in order to take full advantage of the characteristics of stratigraphic natural energy and improve oilfield production rate,the feasibility of enhancing liquid-producing capacity for the CB oilfield was demonstrated by using reservoir engineering method,then the solution scheme and test wells of enhancing liquid-producing capacity were optimized.By the applying the optimization scheme,the water cut of CB oilfield was reduced from 84% to 80%,the cumulative oil has 11×104 m3 after one year,the development effectiveness of CB oilfield was improved.