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根据试验区的动、静态数据,首先用Petrel地质建模软件建立试验区相控地质模型,然后应用CMG软件中的STARS模块进行数值模拟,在水驱阶段和聚驱阶段历史拟合的基础上,分析了聚驱后剩余油分布特征,针对聚驱后剩余油主要分布在聚驱井网分流线处的特征,选择组合轮换式周期注采方式,对分流线处的剩余油进行挖潜;设计了组合轮换式注采周期分别为4个月、6个月、8个月和10个月4种方案,对4种方案的剩余油挖潜效果进行预测。结果表明,聚驱后剩余油主要分布在聚驱井网分流线处,选择组合轮换式周期注采方式挖潜分流线处的剩余油,注采周期为6个月开采时,阶段采出程度为0.98%,净收益为1707.40万元,吨聚增油量为31.41t/t,投入与产出比为1∶2.29,通过开发指标对比和经济效果评价,确定此方案为最佳方案。
According to the dynamic and static data of the experimental area, the phase controlled geologic model of the experimental area was first established with the Petrel geological modeling software. Then the numerical simulation was carried out by using the STARS module in the CMG software. Based on the history of the waterflooding stage and the poly-flooding stage , The remaining oil distribution characteristics after the polymer flooding were analyzed. According to the characteristics of remaining oil mainly distributed in the diversion line of the poly-flooding well after the polymer flooding, a combination cycle rotary injection and recovery method was adopted to tap the remaining oil at the distributary line The four schemes of combined cycle of injection and production were designed, which were 4 months, 6 months, 8 months and 10 months respectively. The remaining oil tapping effect of 4 schemes was predicted. The results show that the remaining oil after the flooding is mainly distributed at the diversion line of the polyhedrilled well, and the remaining oil at the potential diverting line is selected by a combination of cycle injection and injection cycles. When the injection and production cycle is 6 months of mining, The degree of 0.98%, the net income of 17,074,000 yuan, tons of poly oil increase of 31.41t / t, input and output ratio of 1: 2.29, through the development of indicators of comparison and economic evaluation, to determine this program as the best solution.