D6试验区聚驱参数优化及跟踪拟合数值模拟研究

发布时间：2018-05-24 01:33

  本文选题：聚驱 + 注入参数　； 参考：《东北石油大学》2017年硕士论文

【摘要】：D6试验区储层属于中低渗透储层,经过30多年的开发,已经进入了中高含水期,试验区存在地层非均质性强、采出程度高、含水上升速度快等问题,导致油田注水开发效果变差,为改善试验区块的生产状况,进一步挖潜剩余油,试验区准备在2016年8月开展聚驱,区块内共有采出井36口,注入井19口。本文应用Petrel软件建立了试验区的地质模型,在此基础上建立水驱数值模拟模型,进行了水驱历史拟合,分析了水驱剩余油分布特征及主要挖潜部位,将试验区内水驱剩余油主要分为厚油层顶部、薄差层和注采不完善三种类型,研究发现该试验区60%以上的剩余油主要富集在有效厚度在1m以上、渗透率在150×10-3μm2以上的主河道、主体席状砂和过渡相河道中,所以将该部分剩余油富集区作为主要挖潜对象。利用聚驱数值模拟模型进行聚驱注入参数进行优化,优选聚合物的注入浓度为800mg/L,注入速度为0.15PV/a,总的聚合物用量为520mg/L·PV。根据单井配产配注方法对试验区内的生产井和注入井进行配产配注,数值模拟的预测结果表明,该试验区聚驱最终采收率为49.56%,较水驱采收率提高了7.65%。D6试验区块开始注聚后,收集聚驱阶段的生产动态资料,开展聚驱跟踪数值模拟研究,对具有潜力的井层提出挖潜措施,包括采出井的压裂和注入参数的适当调整。
[Abstract]:The reservoir in D6 experimental area belongs to middle and low permeability reservoir. After more than 30 years of development, it has entered the period of middle and high water cut. There are some problems in the test area, such as strong heterogeneity of formation, high degree of production, and fast rising speed of water cut, etc. In order to improve the production condition of the test block and further tap the remaining oil, the test area is prepared to carry out polymer flooding in August 2016. There are 36 production wells and 19 injection wells in the block. In this paper, the geological model of the experimental area is established by using Petrel software. On the basis of this, the numerical simulation model of water drive is established, and the historical fitting of water drive is carried out, and the distribution characteristics of remaining oil and the main potential sites of water drive are analyzed. The remaining oil of water drive in the experimental area is divided into three types: the top of thick oil layer, the thin layer and the imperfect injection-production zone. It is found that more than 60% of the remaining oil in the test area is mainly enriched in the main channel with effective thickness of more than 1m and permeability of 150 脳 10 ~ (-3) 渭 m ~ (2). In the main bedding sand and transitional channel, this part of the remaining oil rich area is regarded as the main target of tapping potential. The polymer injection parameters were optimized by using a numerical simulation model of polymer flooding. The optimal polymer injection concentration was 800 mg / L, the injection rate was 0.15 PVP / a, and the total amount of polymer was 520mg/L PVP. According to the method of single well production and injection, the production wells and injection wells in the test area are distributed and injected. The prediction results of numerical simulation show that the final recovery factor of polymer flooding in the test area is 49.56, which is higher than that of water drive oil recovery after the block of 7.65%.D6 experimental area begins to be injected. The production dynamic data of polymer flooding stage are collected, and the numerical simulation of polymer flooding tracking is carried out, and the potential measures are put forward, including fracturing of production wells and proper adjustment of injection parameters.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.46
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本文编号：1927173