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酸岩反应流动模拟可用于指导油藏酸化施工,优选注入参数,从而以最小的成本最大程度地改善地层.国内外很多学者基于不同的方法建立了不同的模型对碳酸盐岩油藏酸岩反应流进行了研究,但这些模型尚缺乏科学的归纳与整理.以研究对象的空间尺度为依据,将现有的碳酸盐岩油藏酸岩反应流模型分为孔隙尺度模型、岩心尺度模型及井筒尺度模型,简要概括了每类模型的适用条件及其在应用中的局限性.结合本课题组在酸岩反应流模拟方面所做的工作,重点论述了岩心尺度模型的最新研究进展和发展趋势,给出了岩心尺度模型下一步的研究方向,主要包括:建立更接近地层实际的数学模型,如考虑酸化过程中存在的非达西流和地应力的影响;发展高效的数值算法,将模型的计算区域扩大到油藏尺度;将岩心尺度模型进行尺度升级,得到可以指导油藏酸化施工的优化参数.
The acid-rock reaction flow simulation can be used to guide the oil reservoir acidification construction, and the optimal injection parameters, so as to minimize the cost to maximize the formation.Many scholars at home and abroad have established different models based on different methods for the carbonate rock reservoir acid rock But these models are still lack of scientific induction and arrangement.According to the spatial scale of the research object, the existing carbonate flow model of carbonate reservoir is divided into pore scale model, core scale model And the wellbore scale model, the applicable conditions of each model and its limitations in application are briefly summarized.Based on the work done by the research group in the simulation of acid rock reaction flow, the latest research progress of the core scale model and the progress of This paper gives the next research direction of the core scale model, including: establishing a mathematical model closer to the actual formation, such as considering the influence of non-Darcy flow and in-situ stress existing in the acidification process; developing efficient numerical algorithms, The calculation area of the model is extended to the reservoir scale; and the core scale model is upgraded to obtain the optimized parameters that can guide the reservoir acidification construction .