水平缝单砂体压裂改造工艺技术研究

发布时间：2018-01-20 15:40

本文关键词： 单砂体压裂水平缝　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：长垣喇萨杏油田纵向上小层多、储层隔层薄、储层物性差异大;平面上砂体发育差异大、储层非均质性严重;由于上述原因产生的层间矛盾和平面矛盾导致注水开发效果差。纵向上储层动用程度不均衡,部分动用程度差的潜力层始终得不到有效动用,平面上剩余油分布复杂,剩余储量的挖潜难度大。主要体现在两方面:一是纵向上层间矛盾显著,层段内小层间吸水状况差异较大。采油六厂精细示范区小层间吸水差异较大的层段有548个,占注水层段数的38.03%。吸水状况好的小层注水强度已达到13.77 m3/d.m,吸水状况差的小层注水强度只有3.25m3/d.m。二是平面上,非均质性严重。在同一个单砂体上,注水受效非常不均匀。水平缝单砂体压裂以采油厂精细地质研究成果以及剩余油分布情况为基础,以井组单元为研究对象,以减小层间以及平面矛盾、提高储层动用程度为目标,研究单砂体压裂调整技术。综合考虑纵向层间物性差异和平面砂体发育的非均质性,在平面上针对单砂体实施压裂改造,完善注采系统,提高驱油效率;在纵向上实施细分压裂,提高小层的动用程度,改善产液剖面及吸水剖面,最终达到对纵向上的潜力层逐一改造的目标。该项研究可为剩余油调整挖潜提供有效的技术手段,对于提高老区的开发效果具有重要的现实意义。大庆油田开发过程中,以往实施压裂改造只是针对一口井的几个小层进行,主要以单井增产、增注为目的,并没有考虑到通过压裂改造对整个井组实施开发调整,从而提高井组及区块的整体开发效果,因此、针对大庆油田进行水平缝单砂体改造压裂工艺技术研究,将具有十分重要的意义。
[Abstract]:There are many vertical small layers in LaSaxing oilfield, the reservoir is thin, and the physical properties of reservoir are different. There are great differences in the development of sand bodies on the plane, and the reservoir heterogeneity is serious. Because of the interlayer contradiction and plane contradiction caused by the above reasons, the effect of water injection development is poor. The reservoir production degree is not balanced in the longitudinal, and the potential layer with partial poor production degree can not be used effectively all the time. The distribution of remaining oil on the plane is complex, and the potential of remaining reserves is difficult to tap, which is mainly reflected in two aspects: one is the obvious contradiction between the vertical upper layer. There are 548 layers with great difference in water absorption among layers in the fine demonstration area of No. 6 Oil production Plant. The water injection intensity of the sublayer with good water absorption has reached 13.77 m3 / d 路m. The water injection intensity of the sublayer with poor water absorption condition is only 3.25m3 / d.m.The second is plane, serious heterogeneity, and on the same single sand body. The effect of water injection is very uneven. The horizontal fracture single sand body fracturing is based on the fine geological research results of oil production plant and the distribution of remaining oil, and takes the well group unit as the research object to reduce the interlayer and plane contradiction. The aim of this paper is to improve reservoir production, and to study the adjustment technology of single sand body fracturing. Considering the difference of physical properties between longitudinal layers and the heterogeneity of the development of flat sand body, the fracturing modification is carried out on the plane for single sand body. Perfecting injection-production system and improving oil displacement efficiency; In the longitudinal implementation of fracturing subdivision, improve the production of small layers, improve the liquid production profile and water absorption profile. Finally, the goal of transforming the vertical potential layers one by one is achieved. This study can provide an effective technical means for residual oil adjustment and tapping potential. In the development process of Daqing Oilfield, the former fracturing reconstruction was only carried out for several small layers of a well, mainly for the purpose of increasing production and injection in single well. The development adjustment of the whole well group is not taken into account in order to improve the overall development effect of the well group and the block. Therefore, the fracturing technology of horizontal fractured single sand body in Daqing Oilfield is studied. Will have very important significance.
【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

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