海外河油田深部调驱技术研究与应用

发布时间：2018-04-01 16:26

  本文选题：深部调驱　切入点：配方优化　出处：《东北石油大学》2017年硕士论文

【摘要】：海外河油田是注水开发的普通稠油油田,针对长期的注水开发导致储层非均质性加剧,动用程度不均,提高波及体积难度大的问题,开展了海外河油田弱凝胶深部调驱技术。由于弱凝胶在多孔介质中的阻力系数大,占据大孔道后,迫使后续注入水改向,从而提高了注入水的波及效率和最终采收率。本文针对海外河油田深部调驱运行过程中存在的问题,开展相关技术研究。通过对海外河油藏条件和工艺条件分析,设计出弱凝胶的注入量、注入速度、注入压力等注入参数,并确定基础配方;针对弱凝胶调驱体系夏季成胶差的问题,开展成胶影响因素实验研究,建立水质推荐标准,找到主控因素,并形成具有净水、杀菌、除氧效果的配方优化调整技术;针对传统地面注入系统装置简陋、剪切粘度损失大的不足,创新改进工艺流程,提升配液质量,减少注入系统对调驱体系的剪切;利用数值模拟技术对深部调驱注入参数进行优化设计,计算出最佳注入方式为间歇式调驱,并对段塞大小、停注时间等参数进行优化设计;针对深部调驱中后期实施效果变差的现象,开展相关接替技术-聚解剂驱的研究,聚解剂同时具备聚合物和表面活性剂的特性,在原油中也具有良好的降粘、分散、乳化作用,适合于原油粘度较高的普通稠油油藏。
[Abstract]:Oaohe Oilfield is a common heavy oil field developed by water injection. In view of the problem that the reservoir heterogeneity is aggravated and the production degree is uneven, it is difficult to improve the sweep volume due to the long-term waterflooding development. The deep adjusting flooding technology of weak gel in Haihe Oilfield was carried out. Because of the large resistance coefficient of weak gel in porous media, the weak gel occupied the large pore channel and forced the subsequent injection water to change direction. Therefore, the sweep efficiency and final recovery efficiency of injected water are improved. In view of the problems existing in the operation of deep regulation and flooding in Haihe Oilfield, the related technology is studied in this paper. Through the analysis of the conditions and technological conditions of the offshore river reservoir, The injection parameters of weak gel, such as injection rate, injection rate, injection pressure and so on, were designed and the basic formula was determined. In view of the problem of gelling difference in summer of weak gel adjusting and flooding system, the experimental study on the influencing factors of gelation was carried out, and the recommended standard of water quality was established. Find out the main control factors, and form the formula optimization and adjustment technology with the effect of purifying water, sterilizing and removing oxygen, aiming at the shortcomings of the traditional ground injection system, such as simple equipment and large shear viscosity loss, innovating and improving the technological process and improving the quality of liquid distribution, Reducing the shear of the injection system, using the numerical simulation technology to optimize the deep injection parameters, calculating the best injection mode is intermittent modulation flooding, and optimizing the parameters such as slug size, stop injection time and so on. In view of the phenomenon that the effect of deep control flooding has become worse in the middle and late stages, the research on the relevant replacement technology, the polymer flooding, is carried out. The polymer has the characteristics of both polymer and surfactant, and it also has good viscosity reduction, dispersion and emulsification in crude oil. It is suitable for ordinary heavy oil reservoirs with high crude oil viscosity.
【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
，

本文编号：1696317