葡15试验区凝胶深部调驱跟踪模拟研究

发布时间：2018-02-25 07:00

本文关键词： 葡15试验区凝胶深部调驱跟踪模拟　出处：《东北石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：葡15试验区储层属于中孔中渗储层,平均孔隙度为23.7%,平均有效渗透率为298×10-3μm2。目前葡15试验区在开发过程中存在剩余油分布较为分散、注采矛盾突出等问题,为解决这些问题在葡15试验区应用了凝胶深部调驱技术。深部调驱技术是一种有效提高油田开发后期原油采收率的技术,而凝胶作为一种调驱剂,具有逐渐成胶的特性,且具有一定的交联强度,可以暂时封堵高渗透层,发挥化学驱油的作用。为了更有效的进行凝胶深部调驱,本文利用数值模拟方法进行了葡15试验区凝胶深部调驱跟踪模拟研究,以验证凝胶深部调驱的实施效果和指导深部调驱措施的调整。首先,本文利用Petrel软件建立了葡15试验区的精细地质模型,在精细地质模型的基础上选取了模拟区块进行了水驱历史拟合;其次对剩余油分布特征进行了描述,确定了剩余油类型包括厚油层顶部型、薄差层型、注采不完善型和井网控制不住型四种类型;针对水驱后剩余油分布情况,在凝胶深部调驱模型支持的基础上,利用CMG数值模拟软件进行了凝胶深部调驱跟踪模拟研究,对比分析了跟踪前后产量、综合含水率和采收率等参数的变化和剩余油分布的变化情况,确定了剩余油富集的潜力井层;然后,针对三口压裂井的受效情况,提出了生产井压裂和注水井增注两种挖潜建议;最后根据剩余油挖潜建议设计了凝胶深部调驱开发调整方案,优化了调驱剂的注入量,以指导注入参数和生产参数的调整。本论文研究成果可为葡15试验区提供有效的提高原油采收率技术方法和技术措施。
[Abstract]:The reservoir in Pu15 experimental area belongs to mesoporous and permeable reservoir with average porosity of 23.7and average effective permeability of 298 脳 10-3 渭 m2. At present, the remaining oil distribution is dispersed and the contradiction between injection and production is prominent in the development of Pu15 experimental area. In order to solve these problems, the gel deep modulation flooding technology has been applied in the Pu15 experimental area. Deep modulation flooding technology is a kind of effective technology to improve the oil recovery in the later stage of oilfield development, and the gel, as a kind of adjusting flooding agent, has the characteristics of gradual gelation. And has certain crosslinking strength, can temporarily seal the high permeability layer, play the role of chemical flooding. In this paper, numerical simulation method is used to simulate the deep gel profile in Pu15 experimental area to verify the effect of deep gel flooding and to guide the adjustment of deep flooding. In this paper, the fine geological model of Pu15 experimental area is established by using Petrel software. On the basis of the fine geological model, the simulated blocks are selected to fit the history of water drive, and the distribution characteristics of remaining oil are described. The remaining oil types include thick reservoir top type, thin and poor layer type, imperfect injection-production type and uncontrollable well pattern type. By using CMG numerical simulation software, the tracking simulation of deep gel flooding is carried out, and the changes of production, comprehensive water cut and recovery factor and the distribution of remaining oil before and after tracking are compared and analyzed. The potential reservoir of remaining oil enrichment is determined, and then, according to the effect of three fracturing wells, two kinds of potential tapping suggestions for production well fracturing and water injection well increasing are put forward. Finally, according to the suggestion of tapping the potential of remaining oil, the adjustment scheme of deep gel flooding is designed to optimize the injection rate of the adjuster. In order to guide the adjustment of injection parameters and production parameters, the research results in this paper can provide effective technical methods and technical measures for improving oil recovery in the Portuguese 15 experimental area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE39

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