姬塬油田侏罗系油藏罗257井区稳产对策研究

发布时间：2018-01-24 13:38

本文关键词： 边底水高含水开发效果稳产对策　出处：《西安石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：姬塬油田罗257井区侏罗系油藏是典型的低渗透油藏,且边底水较为发育,经过多年注水开发,目前井区存在含水上升速度快,水淹井不断增多,产能损失严重,水驱储量动用程度低、井网适应性差、地层压力保持水平低等问题。本文以油藏精细描述为基础,结合生产动态资料,分析油藏开发动态和含水上升规律;针对井区开发过程中存在问题,分析油井见水来源,并从多个方面分析油井见水原因,确定研究区含水上升主要受到边底水、注入水和井网系统的影响;评价井区水驱开发效果及注入水利用率和地层能量保持水平;综合油藏工程、矿场统计、数值模拟等多种方法确定出合理的开发技术政策,包括底水发育区与底水不发育区合理单井产量、采油速度、注采压力系统和注采比为之后稳产对策打下基础。根据油藏数值模拟研究结果,以剩余油饱和度和地层压力分布状况为基础,提出罗257井区稳产对策,内容包括:治理高含水井和低产井,调整菱形反九点井网为排状注水。研究结果表明,措施方案增油6.5万吨,提高采收率2.3%,提高井区产量,减缓含水上升速度,从而为同类油藏开发提供决策依据。
[Abstract]:Jurassic reservoir in Luo257 well area of Jiyuan Oilfield is a typical low permeability reservoir, and the edge and bottom water is relatively developed. After years of water injection development, there exists a rapid rise rate of water cut and an increasing number of waterlogged wells in the well area. The production loss is serious, the production degree of water drive reserves is low, the adaptability of well pattern is poor, and the level of formation pressure is low. This paper is based on fine description of reservoir and combined with production performance data. Analysis of reservoir development performance and water cut rising law; In view of the problems existing in the development of well area, the water source of oil well is analyzed, and the reason of oil well water discovery is analyzed from many aspects. It is determined that the rise of water cut in the study area is mainly affected by the side and bottom water, injection water and well pattern system. To evaluate the development effect of water drive in well area and the utilization ratio of injection water and the level of formation energy maintenance; Comprehensive reservoir engineering, field statistics, numerical simulation and other methods to determine reasonable development technology policy, including the bottom water development area and the bottom water undeveloped area reasonable single well production, oil recovery speed. The injection-production pressure system and the injection-production ratio lay the foundation for the following stable production countermeasures. According to the results of reservoir numerical simulation, based on the remaining oil saturation and formation pressure distribution, the stable production countermeasures are put forward in Luo257 well area. The contents include: controlling high water cut well and low production well, adjusting rhombic reverse nine-spot well pattern to row water injection. The research results show that the measure scheme increases oil production by 65,000 tons, increases oil recovery by 2.3and improves well area production. The rise rate of water cut is slowed down, thus providing decision basis for the development of similar reservoirs.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357

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