Nuraly油田优化注水研究

发布时间：2018-01-29 07:49

本文关键词： 优化注水三维地质模型数值模拟剩余油　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：Nuraly油田为储层物性非均质性较强的中孔中渗砂岩油藏。该油田J层系采出程度9.87%,综合含水率44.18%,各层系之间地层压力差别较大,在现有注采方式下其生产问题与井间矛盾日益突出。因此,本文在完善和调整注采井网的基础上对Nuraly油田J层系进行了优化注水技术对策研究。首先,在储层地质特征研究的基础上,建立了Nuraly油田J层系的三维地质模型,并用孔渗参数和地质储量的拟合程度论证了模型的合理性。其次,运用油藏数值模拟手段对J层系4个层进行生产历史拟合,单井拟合率达87.5%,对后续开发方案调整的井历史拟合率达到100%。在此基础上,结合油田开发生产,综合分析了剩余油分布及其富集规律。储层物性非均质性严重,井网密度小,注采井网不完善,注采参数不配伍以及射开程度不完善是该层系剩余油产生的主要原因。最后,对主力层系J-0、J-II中的重点井组从井网密度,注采关系,注采参数配伍性等方面对其进行优化注水技术对策研究,并给出了推荐的优选方案顺序,为油田的下一步开发调整、提高原油采收率奠定了基础。
[Abstract]:Nuraly oilfield is a middle porosity and middle permeability sandstone reservoir with strong physical heterogeneity. The production degree of J series is 9.87 and the comprehensive water cut is 44.18%. The formation pressure varies greatly among the strata, and the production problem and the inter-well contradiction are becoming more and more serious under the existing injection-production mode. On the basis of perfecting and adjusting injection-production pattern, this paper studies the countermeasures of optimizing water injection technology in J series of Nuraly oilfield. Firstly, on the basis of the study of reservoir geological characteristics. The 3D geological model of J series in Nuraly oilfield is established, and the rationality of the model is proved by the fitting degree of pore and permeability parameters and geological reserves. By using reservoir numerical simulation method, the production history of 4 layers of the J series is fitted. The fitting rate of single well reaches 87.5, and the historical fitting rate of wells adjusted for the subsequent development scheme is 100. On this basis. Combined with oilfield development and production, the remaining oil distribution and its enrichment law are comprehensively analyzed. The reservoir physical heterogeneity is serious, the well pattern density is small, and the injection-production well pattern is not perfect. Incompatibility of injection and production parameters and imperfect shooting opening are the main reasons for the formation of residual oil. Finally, the density of well pattern and the relationship between injection and production of the key well groups in the main formation J-0 + J-II are discussed. The optimization of water injection technology is studied in terms of compatibility of injection and production parameters, and the recommended sequence of optimal selection scheme is given, which lays a foundation for the further development and adjustment of oil fields and the improvement of crude oil recovery.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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