水驱厚层油藏纵向波及系数预测新模型

发布时间：2018-05-24 01:32

本文选题：厚层油藏 + 水驱　；参考：《特种油气藏》2017年02期

【摘要】：针对厚油层内部的强非均质性和窜流现象导致的纵向波及系数预测精度低的问题,考虑层内受瞬时窜流及渗透率非均质性的影响,引入渗透率对数正态分布函数,结合拟相对渗透率法和水驱油理论,建立了纵向波及系数预测新模型。研究结果表明:模型计算结果与矿场实际数据基本吻合,从而验证了模型的可靠性和较高的精确度;敏感性分析表明,渗透率变异系数和流度比越大的油层,纵向波及系数越小,原油主要在高含水时期被采出,此时需调整注采井网,合理划分层系,从而提高油藏纵向波及系数。研究成果为水驱开发厚层油藏纵向波及系数的预测提供了理论指导。
[Abstract]:Aiming at the problem of low prediction accuracy of longitudinal sweep coefficient caused by strong heterogeneity and channeling phenomenon in thick reservoir, considering the influence of instantaneous channeling flow and permeability heterogeneity, the logarithmic normal distribution function of permeability is introduced. Based on the pseudo-relative permeability method and water flooding theory, a new model of longitudinal sweep coefficient prediction is established. The results show that the model results are in good agreement with the actual field data, which verifies the reliability and accuracy of the model, and the sensitivity analysis shows that the greater the permeability variation coefficient and mobility ratio is, the higher the permeability variation coefficient and mobility ratio are. The smaller the longitudinal sweep coefficient is, the more the crude oil is produced in high water cut period. At this time, it is necessary to adjust the injection-production well pattern and reasonably divide the strata to improve the vertical sweep coefficient of the reservoir. The research results provide theoretical guidance for prediction of vertical sweep coefficient of thick reservoir developed by water flooding.
【作者单位】：中国石油勘探开发研究院;
【基金】：中国石油天然气集团公司海外油气田开发关键技术研究课题“乍得厚油层岩性砂岩油藏注水开发技术”(2016D-4402)
【分类号】：TE357.6

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