葡80-63区块大位移定向井潜力及优选方法研究

发布时间：2019-04-18 17:28

【摘要】：葡北油田三断块位于松辽盆地中央凹陷大庆长垣二级构造带南部的三级构造带葡萄花构造中部,东西两侧为近南北向、南端为近东西向的封闭性断层所分隔,整体上构造呈近南北向展布,是一个西高东低的断块构造。葡北油田三断块于1979年投入开发,经过三十多年的注水开发,目前已进入特高含水开发阶段。但区块开发实践却表明,在这种特高含水条件下,受到构造、储层非均质性以及井控程度等因素的影响,在断层附近区域仍然存在局部剩余油富集区。因此,本论文提出了大位移定向井挖潜断层边部剩余油,从而进一步改善和提高断层边部剩余油富集区的开发效果。本论文通过开展葡80-63区块井震联合精细构造解释,精细落实了该区块层位及断层空间展布形态,并以此为基础建立三维地质模型和数值模型,开展了研究区地质储量拟合以及全区和单井生产历史拟合。同时,对研究区进行剩余油分布规律研究,确定断层边部剩余油富集规律。结合断层展布规律、剩余油富集规律、安全性论证及井轨迹可行性分析优化大位移定向井布井参数。最后运用数值模拟方法对布井方案进行预测,预测结果显示该方案显著地改善了当前的生产状况,提高了对断层边部区域储量的动用情况,有效地增加了该区块的产量,这对于葡北油田三断块葡80-63区块的开发和认识有着重要的实际意义,同时也为该油田接下来的开采与增产提供了指导,为实际生产中大位移定向井布井方案的优选部署提供了依据。
[Abstract]:The third fault block of Pubei Oilfield is located in the middle part of the third-order structural belt of Daqing Placanticline in the central depression of Songliao Basin. The east-west side of the fault block is near the south-south direction and the south end is separated by the near-east-west-trending sealing fault. As a whole, the structure is distributed in the north-south direction, which is a fault block structure with high west and low east. The third fault block of Pubei Oilfield was put into development in 1979. After more than 30 years of water flooding, it has entered the stage of ultra-high water cut development. However, the development practice of the block shows that under this very high water cut condition, the local residual oil enrichment area still exists in the area near the fault affected by the factors such as structure, reservoir heterogeneity and well control degree. Therefore, this paper proposes to exploit the remaining oil at the edge of the potential fault in the directional well with large displacement, so as to further improve and improve the development effect of the remaining oil enrichment area on the edge of the fault. In this paper, through the interpretation of well-seismic and fine structure in Pu803block, the horizon and fault spatial distribution of this block have been implemented in detail, and the 3D geological model and numerical model have been established on the basis of this. The geological reserves fitting and production history fitting of the whole area and single well in the study area were carried out. At the same time, the distribution of residual oil in the study area is studied to determine the enrichment law of residual oil on the edge of fault. Combined with fault distribution law, remaining oil enrichment law, safety demonstration and well trajectory feasibility analysis, optimization of well layout parameters for directional wells with large displacement is carried out. Finally, the numerical simulation method is used to predict the well placement scheme. The prediction results show that the scheme has significantly improved the current production situation, increased the production of reserves on the fault edge region, and effectively increased the output of the block. This is of great practical significance to the development and understanding of the third fault block in Pubei Oilfield, Portugal 80m 63, and also provides guidance for the next development and increase of production in the oil field. It provides the basis for the optimum arrangement of the well layout scheme for large displacement directional wells in actual production.
【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】：TE327

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