樊151块低渗透滩坝砂油藏注水技术

Technology of water injection for beach-bar sand reservoirs with low permeability in Block Fan 151

樊151块为低渗透滩坝砂油藏,储层整体物性差,注水过程中水井注入压力越来越高。针对这一问题,室内评价了储层的敏感性、润湿性、水质配伍性,系统分析了注水井吸水能力变差的原因,然后优化了转注工艺及注水体系,并进行了现场试验,效果良好,实现了樊151块稳定注水,从而提高了储量动用率及最终采收率。

Block Fan 151 is a beach-bar sand reservoir with low permeability.The overall physical property of reservoir is poor.The injection pressure becomes higher and higher during the process of water injection.Aiming at this problem,the sensibility,wettability and water compatibility of reservoir were evaluated in laboratory.The reason of poor water absorbing capacity of injection well was analyzed systematically in this paper.The converted process and water injection system were optimized and the field test was done with a good result.The stable water injection of Block Fan 151 was achieved and the producing rate of reserves and ultimate recovery were improved.