水驱油藏开发后期经济井网密度计算的改进方法

发布时间：2018-01-23 18:00

本文关键词： 水驱油藏井网加密经济合理井网密度经济极限井网密度净现值　出处：《科学技术与工程》2016年32期 　论文类型：期刊论文

【摘要】：井网加密调整是水驱油藏开发后期提高采收率的一项重要手段。通过计算确定合理的井网密度,既能提高油藏最终采收率,又能提升经济效益,对水驱油藏后期开发具有重要的现实意义。对水驱油藏开发后期经济的计算方法做出了改进。首先,采用加密调整后油藏最终采收率与加密调整前采出程度之差计算新增可采储量;然后,利用产量递减规律预测油藏井网加密后未来生产年限中的产油量;最后,在充分考虑储层物性、原油物性、注采井数比以及经济因素的基础上,根据净现值原理计算经济合理井网密度与经济极限井网密度。实例计算与对比分析表明,改进方法计算结果可靠,更符合水驱油藏开发后期的客观实际,对油藏开发后期合理井网密度的确定及井网调整具有重要的指导意义。
[Abstract]:Well pattern infill adjustment is an important means to improve recovery in the later stage of water drive reservoir development. Determining reasonable well pattern density by calculation can not only improve the final recovery factor of reservoir but also enhance economic benefit. It has important practical significance for the later development of water drive reservoir. The economic calculation method of the later development of water drive reservoir has been improved. First of all. The new recoverable reserves are calculated by using the difference between the final recovery factor of the reservoir after infilling adjustment and the degree of recovery before the infilling adjustment. Then, the production decline law is used to predict the oil production in the future production life after infilling well pattern in reservoir. Finally, on the basis of fully considering reservoir physical properties, crude oil physical properties, injection-production number ratio and economic factors. According to the principle of net present value, the economical and reasonable well pattern density and the economic limit well pattern density are calculated. The example calculation and comparative analysis show that the result of the improved method is reliable, which is more in line with the objective reality of the later stage of water drive reservoir development. It has important guiding significance for determining reasonable well pattern density and adjusting well pattern in the later stage of reservoir development.
【作者单位】：西南石油大学油气藏地质及开发工程国家重点实验室;
【分类号】：TE32
【正文快照】： 井网密度是油田开发设计和井网调整中涉及到的一项核心内容,其大小直接影响着油田最终采收率的高低、建设投资的多少及经济效益的好坏[1,2]。目前,国内大部分油藏已进入水驱开发后期阶段,开发效果日渐变差,更加需要通过合理的井网加密调整来稳定油田产量,实现油田的高产稳产,

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