魏峰,汤明光,马帅,陈业祥,柳家正,王金伟,邢天戈,乔润伟,梁永星
Wei Feng,Tang Mingguang,Ma Shuai,Chen Yexiang,Liu Jiazheng,Wang Jinwei,Xing Tiange,Qiao Runwei,Liang Yongxing

• 1:中海石油(中国)有限公司湛江分公司
• 2:中海油田服务股份有限公司
• 3:海洋油气高效开发全国重点实验室

摘要(Abstract)：

为进一步升级压驱工艺，解决现有压驱增油机理认识不充分、数值模拟模型考虑不全面、产量预测准确性不高的问题，利用物模实验研究压驱过程增油机理，结合数值模拟手段建立压驱过程多物理场表征模型，建立低渗透油藏压驱精细模拟表征方法。模型中将渗透率及传导率随时间变化纳入考虑，减少人为干预，提升了压驱模拟精度。结果表明：压驱过程受应力演化、裂缝产生与扩展、孔隙度和渗透率演化、裂缝导流能力变化、相渗变化、表面活性剂和渗吸置换效应等多种机理影响；其中裂缝产生与扩展是压驱过程中的主导机制，对增油量的贡献率为50.7%，而表面活性剂和渗吸作用对增油量的贡献率分别为29.7%和19.6%；形成的压驱过程多物理场表征模型准确性经南海W油田多口井的数据验证，使用该模型可以为压驱工程设计优化注入体积、排量和闷井时间等参数。研究成果可为低渗透油藏开发的技术迭代与方案制定提供系统性指导。
In order to further upgrade current fracture-flooding technology and solve the problems of insufficient understanding of existing oil enhancement mechanism, incomplete consideration of numerical simulation models and low accuracy in production prediction, physical modeling experiments are conducted to study oil enhancement mechanisms of fracture-flooding. Combined with numerical simulation, multi-physics field characterization models for fracture-flooding process are established to develop a fine characterization method for numerical simulation of fracture-flooding in low-permeability reservoirs. Variations of permeability and conductivity with time are taken into account by the model, reducing human intervention and improving the accuracy of fracture-flooding simulation. The results show that the fracture-flooding process is influenced by multiple mechanisms including stress evolution, fracture initiation and propagation, porosity and permeability evolution, relative permeability variation, surfactant effect and imbibition effect. Among them, fracture initiation and propagation are the dominant mechanisms for fracture-flooding, with contribution rate of 50.7% to incremental oil production, while surfactant and imbibition effects contribute 29.7% and 19.6%, respectively. The accuracy of developed multi-physics field characterization model for fracture-flooding is validated using data from multiple wells in W oilfield in South China Sea. This model can be used to optimize the parameters such as injection volume, displacement rate and soaking time for fracture-flooding engineering design. The research provides systematic guidance for technical iteration and program formulation in the development of low-permeability reservoirs.

关键词(KeyWords)： 低渗透油藏;油井压驱;多物理场耦合;油水吸渗置换;孔渗演化
low-permeability reservoir;fracture-flooding in production wells;multi-physics field coupling;oil-water imbibition displacement;porosity and permeability evolution

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“南海低渗油藏有效开发关键技术与示范”（2025ZD1407405）

作者(Author): 魏峰,汤明光,马帅,陈业祥,柳家正,王金伟,邢天戈,乔润伟,梁永星
Wei Feng,Tang Mingguang,Ma Shuai,Chen Yexiang,Liu Jiazheng,Wang Jinwei,Xing Tiange,Qiao Runwei,Liang Yongxing

DOI: 10.19597/J.ISSN.1000-3754.202511023

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