偏心五点井网的水驱开发特征

发布时间：2018-01-08 02:04

本文关键词：偏心五点井网的水驱开发特征　出处：《大庆石油地质与开发》2017年05期 　论文类型：期刊论文

【摘要】：实际油田中五点井网的井位分布与常规井网可能会存在一些偏差,形成偏心五点井网,研究偏心五点井网的水驱开发问题十分必要。基于压力叠加原理,求解了偏心五点井网的稳态渗流问题,并结合流线方法分析偏心距的变化对五点井网水驱开发特征的影响。研究结果表明:在均质地层中,随着五点井网偏心距的增大,井网单元的流线分布越来越不均匀,井网见水时间提前,见水时刻的面积波及效率降低,与常规五点井网相比,偏心五点井网的水驱开发效果会明显变差。为了改善偏心五点井网的水驱开发效果,在满足均匀驱替的基础上,给出了一种简单的计算偏心五点井网合理生产井流量比的数学公式。
[Abstract]:There may be some deviations between the well location distribution of the five-spot well pattern and the conventional well pattern in the actual oilfield, so it is necessary to study the water drive development problem of the eccentric five-spot well pattern based on the principle of pressure superposition. The steady flow problem of eccentric five-spot well pattern is solved, and the influence of eccentricity variation on the development characteristics of five-spot well pattern is analyzed by using streamline method. The results show that: in homogeneous formation. With the increase of the eccentricity of five-spot well pattern, the streamline distribution of well pattern element is more and more uneven, the water breakthrough time of well pattern is earlier, and the area sweep efficiency of water arrival time is reduced, compared with the conventional five-spot well pattern. In order to improve the development effect of eccentric five-spot well pattern, the water drive development effect of eccentric five-spot well pattern will become worse obviously, on the basis of satisfying the uniform displacement. A simple mathematical formula for calculating reasonable production well flow ratio of eccentric five-spot well pattern is presented.
【作者单位】：中国地质大学(北京)能源学院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05060)
【分类号】：TE357.6
【正文快照】： 五点井网由于其水驱控制面积大、易于调整等特点,是油气田开发过程中最常用的井网形式。关于常规五点的研究已经成熟,从20世纪90年代开始,国内大量学者开始致力于研究各种非常规五点井网的水驱开发问题,以适应不同地质条件对井网开发的要求。郎兆新等[1-2]通过将水平井引入到

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