La8井区注聚参数优化及开发调整研究

发布时间：2018-02-09 04:56

本文关键词： 参数优选措施调整聚合物驱数值模拟　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前,化学驱是油田高含水后期主要挖潜技术,我国的化学驱油技术已经走在世界前列,并在大庆、胜利等大油田得到显著的效果。聚合物驱是化学驱的重要组成部分,水驱后进行聚合物驱能够进一步提高采收率10%以上。聚合物驱能够有效地增加水相粘度,改善驱替相与被驱替相流度比,扩大波及体积,提高洗油效率。油田开发到中后期后,含水上升较快,受储层条件和开发条件的影响使得剩余油分布更为零散和复杂,如何准确地确定剩余油分布及有效地挖潜剩余油、得到更好的开发效果成为一项重要的课题。油田开发中的“三大矛盾”,即层内矛盾、层间矛盾、平面矛盾日益突出,这些矛盾的出现加剧了剩余油挖潜的难度。因此有必要更好地制定开发方案,进一步提高石油的采收率。本文针对La8井区注聚参数优化及开发调整开展研究,主要做了以下工作:首先,本文分析了La8井区当前的开采状况,绘制了中心井区的产液量、产油量、含水率和注入量、注入聚合物浓度等综合开采曲线;应用Petrel地质建模软件,建立了La8井区基于随机建模方法的三维相控地质模型,给出了模型的构造面和属性分布状况;在对地质模型进行储量拟合的基础上应用Eclipse数值模拟软件对La8井区进行了数值模拟研究,并进行了全区和单井的历史拟合;其次,研究了目前聚驱浓度分布,给出了小层聚合物浓度分布图和全区不同时间聚合物浓度分布图,分析了目前聚驱开发效果;从平面及纵向两个方面对剩余油分布进行分析;利用数值模拟方法,对聚合物驱的合理用量进行了研究,针对研究井区实际情况,优化了注入聚合物分子量、注入浓度及注入速度;最后,对提高注采液量、压裂(只对油井压裂和油井及相应水井压裂)及加密(不同加密时机、不同加密方式)等调整方案进行模拟预测,得到不同方案的开发效果,为进一步挖潜剩余油提供依据。
[Abstract]:At present, chemical flooding is the main technology of tapping potential in the late stage of high water cut of oil fields. The chemical flooding technology of our country has been in the forefront of the world, and has achieved remarkable results in Daqing and Shengli oil fields. Polymer flooding is an important part of chemical flooding. Polymer flooding after water flooding can further increase oil recovery by more than 10%. Polymer flooding can effectively increase viscosity of water phase, improve mobility ratio of displacement phase to displaced phase, enlarge sweep volume and improve oil washing efficiency. Due to the influence of reservoir conditions and development conditions, the distribution of remaining oil is more scattered and complex. How to determine the distribution of remaining oil accurately and effectively tap the remaining oil, Getting better development results has become an important issue. The "three contradictions" in oilfield development, namely, intra-layer contradiction, inter-layer contradiction, plane contradiction, are becoming increasingly prominent. These contradictions make it more difficult to tap the potential of the remaining oil. Therefore, it is necessary to make a better development plan and further improve the oil recovery. In this paper, the optimization of polymer injection parameters and development adjustment in La8 well area are studied. The main work is as follows: firstly, this paper analyzes the current production situation of La8 well area, draws the comprehensive production curves of the central well area, such as liquid production, oil production, water cut and injection rate, injection polymer concentration, etc., and applies Petrel geological modeling software. A 3D phase-controlled geological model based on stochastic modeling method in La8 well area is established, and the distribution of structure plane and attributes of the model is given. On the basis of the reserve fitting of the geological model, the Eclipse numerical simulation software is used to simulate the La8 well area, and the historical fitting of the whole area and the single well is carried out. Secondly, the concentration distribution of polymer flooding is studied. The distribution map of polymer concentration in small layer and the distribution map of polymer concentration at different time in the whole area are given, and the current development effect of polymer flooding is analyzed, the distribution of remaining oil is analyzed from two aspects of plane and longitude, and the numerical simulation method is used. The reasonable dosage of polymer flooding is studied, and the molecular weight, concentration and injection rate of polymer injection are optimized according to the actual conditions in the well area. Fracturing (only for oil well fracturing and oil well and corresponding well fracturing) and infilling (different infilling time, different infilling mode) and other adjustment schemes are simulated and forecasted, and the development effect of different schemes is obtained, which provides the basis for further tapping potential remaining oil.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.46

【参考文献】