储层物性时变对油藏水驱开发的影响

Impact of physical properties time variation on waterflooding reservoir development

 姜瑞忠¹ 乔欣¹ 滕文超¹ 徐建春¹ 孙召勃² 谢丽沙²

中国石油大学（华东）石油工程学院，山东 青岛 266580 中海石油（中国）有限公司天津分公司，天津 300452）

 针对水驱油藏储层物性时变影响油田开发效果和剩余油分布的问题，分析了采用过水倍数表征物性时变规律会造成计算结果不稳定的原因，提出基于面通量的物性时变表征方法，并通过矿场资料分析、黑油模型改进、软件编制，建立了相应的数值模拟技术。利用该技术研究物性时变对油藏开发的影响，结果表明：考虑渗透率和相渗曲线综合时变后，剩余油主要富集在靠近生产井的主流线两侧，油藏采出程度比不考虑物性时变提高8.3百分点；渗透率和相渗曲线时变的影响存在一定差异，渗透率时变会使开发效果稍微变差，相渗曲线时变会使开发效果明显提高。该技术解决了基于过水倍数的物性时变数值模拟方法计算结果受网格尺寸影响的问题，对准确预测油藏开发指标和剩余油分布具有重要的应用价值。

 Since physical properties time variation influences the remaining oil distribution and reservoir development effect, the reason why simulation results are unstable using injection wash out multiple to describe physical properties variation is analyzed, and then a new method to characterize physical time variation properties based on surface flux is put forward. By means of field study, traditional black oil model transformation and software programming, corresponding numerical simulation technology was developed. Using the technology to study the effect of physical properties time variation on reservoir development, the results indicate that after considering variation of both permeability and relative permeability curve, the remaining oil mainly distributes in both sides of the mainstream line close to the production well, and the recovery factor improves 8.3%; permeability and relative permeability have different influence on development. Permeability time variation can make development effect slightly worse while relative permeability time variation can obviously improve the development. This technology solves the problems of the existing numerical simulation methods based on injection wash out multiple in stability for different grid size, and has important application value in development index prediction and remaining oil distribution study.

10.6056/dkyqt201606017