聚驱后三元复合驱进一步提高采收率数值模拟研究

首先利用正交实验设计,确定了化学剂最佳注入程序为0.1PV聚合物前置段塞、0.45PV三元复合剂主段塞、0.05PV聚合物后续保护段塞,其次再依据聚驱后区块特点及实际情况,设计了三套井网方案并开展了聚驱后三元复合驱进一步提高采收率数值模拟研究。数模结果表明,三元复合驱与前一阶段聚驱相比平均可提高采收率12.9%,其中,水平井和直井的注采组合方案提高的采收率幅度最大,达到15.97%,所以聚合物驱后应综合考虑水平井的注采调整和三元复合驱的多重优势,以期取得更好的开发效果。

Numerical simulation of ASP flooding EOR after polymer flooding

The EOR potentiality of ASP flooding after polymer flooding has been studied by reservoir numerical simulation. According to the pilot , the optimum injection proceeding of chemical material was 0.1PV polymer preslug , 0.45PV ASP main slug , 0.05PV polymer follow-up protective slug by the orthogonal experiment , and then three projects of well patterns were designed on the basis of the feature of pilot.The results demonstrate that the ASP flooding can further enhance oil recovery by 12.9%than the polymer flooding.In combination with horizontal wells and vertical wells , the project has the biggest potentiality and the EOR is 15. 97%.Therefore , the multiple advantages of horizontal wells adjustments and ASP flooding should be considered after polymer flooding so that the better development effect to be anticipated.