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Selection of Adequate Reservoir Models for EOR Laboratory Simulation

机译：EOR实验室模拟适当储层模型的选择

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The publication reviews the influence of core samples on reliability of data collected during laboratory simulation of formation stimulation techniques depending on the type of reservoirs. The analysis has shown that, as opposed to composite models, a full-size core displays the interconnection of pore systems in complex reservoirs in the best possible way, and this makes it possible to draw more correct conclusions on the efficiency of techniques such as assessment of adsorption and mechanical destruction of polymer compounds, strength of the built waterproof barrier, pressure dynamics during injection, etc. When selecting full-size core samples, in order to increase reliability of the laboratory simulation data, it is necessary to consider rock anisotropy that is inherent to carbonate reservoirs and is generally associated with rock fracturing. Based on the obtained knowledge about improvement of EOR simulation efficiency under complex carbonate reservoir conditions, laboratory analyses have been carried out using core material and METКA thermoreversible polymer compound developed by the Institute of Petroleum Science, Russian Academy of Sciences, Siberian Branch. The usage of a full-size core made it possible to assess the efficiency of METКA technology in terms of involvement in the development of not only low-permeability layers, but also high- permeability formation zones which have not been covered before or lightly covered by water-flooding. The analyses carried out using composite models from a standard-size core showed that the obtained data in terms of assessment of water-flooding coverage had low informative value. Thus, it was found that core samples of the maximum diameter must be used for testing under complex carbonate reservoir conditions due to low representativity of standard samples. The obtained findings are of practical importance in terms of correct assessment of EOR parameters for wells during field development.
机译：该出版物审查了核心样本对根据储层类型的形成刺激技术在实验室模拟中收集的数据可靠性的影响。该分析表明，与复合模型相反，全尺寸核心以最佳方式显示孔系统在复杂储存器中的互连，这使得这使得可以在评估等技术效率下得出更正确的结论高分子化合物的吸附和机械破坏，内置防水屏障的强度，注射过程中的压力动力学等。为了提高实验室仿真数据的可靠性，有必要考虑岩石各向异性是碳酸盐储层固有的，通常与岩石压裂有关。基于对复杂碳酸盐储层条件下改善EOR仿真效率的知识，使用了由石油科学研究所，西伯利亚分公司开发的核材料和Metкa热可逆聚合物化合物进行实验室分析。全尺寸核心的使用使得在不仅是低渗透层的发展方面的参与方面可以评估Metкa技术的效率，而且还可以在缺渗透层的开发中，但也可以在之前或以前覆盖的高渗透性形成区域水洪水。使用来自标准尺寸核心的复合模型进行的分析表明，在水洪水覆盖范围的评估方面获得的数据具有低的信息价值。因此，发现由于标准样品的低表示性，最大直径的核心样品必须在复杂的碳酸盐储层条件下进行测试。在现场开发期间对井的EOR参数进行了正确评估，所得调查结果具有实际重要性。

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