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Experimental and numerical simulation study on the flow characteristics and optimization of structural parameters of displacement agent in partial pressure tools
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2019-12-18 , DOI: 10.1002/ese3.594 Bin Huang 1 , Xinyu Hu 1 , Cheng Fu 1, 2 , Haoran Cheng 3, 4 , Yuehua Li 5
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2019-12-18 , DOI: 10.1002/ese3.594 Bin Huang 1 , Xinyu Hu 1 , Cheng Fu 1, 2 , Haoran Cheng 3, 4 , Yuehua Li 5
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In order to solve the problem of reservoir heterogeneity in the process of oil displacement, Daqing oilfield has proposed a partial pressure injection technology (using partial pressure tools). The partial pressure tool can improve the overall oil displacement effect by reducing the pressure of the displacement agent and adjusting the injection amount of the displacement agent in the high‐permeability oil layer. In order to study the effect of the partial pressure tool on the polymer solution, the flow characteristics of the polymer solution in the partial pressure tool were studied by finite element analysis, and the results of the numerical simulation were compared and verified by laboratory experiments. Then, the optimal structural parameters of the partial pressure tool were selected by orthogonal experiments. Finally, field tests were carried out to verify the effectiveness of the partial pressure tool. The results show that when the flow rate is 10 m3/d, the pressure drop of the polymer solution reaches 6.08 × 105 Pa and the viscosity loss rate reaches 6.69%, while the physical parameters of the solution change periodically under the action of the partial pressure tool. At a low flow rate, the results of the laboratory experiment and numerical simulation fit well, and the optimal structural parameters of the partial pressure tool are selected. Field tests show that the oil recovery is increased by 2.54% after using partial pressure tools. The research results are of great significance to the study of resolving interlayer conflicts and enhancing oil recovery.
中文翻译：
分压工具中流动剂流动特性及结构参数优化的实验与数值模拟研究
为了解决驱油过程中储层非均质性的问题，大庆油田提出了一种分压注入技术（利用分压工具）。分压工具可以通过降低驱替剂的压力和调节驱替剂在高渗透油层中的注入量来改善整体驱油效果。为了研究分压工具对聚合物溶液的影响，通过有限元分析研究了分压工具中聚合物溶液的流动特性，并通过实验室实验对数值模拟结果进行了比较和验证。然后，通过正交试验选择了分压工具的最佳结构参数。最后，进行了现场测试，以验证分压工具的有效性。结果表明，当流量为10 m时3 / d，聚合物溶液的压降达到6.08×10 5 Pa，粘度损失率达到6.69％，而溶液的物理参数在分压工具的作用下周期性变化。在低流量下，实验室实验和数值模拟的结果非常吻合，并且选择了分压工具的最佳结构参数。现场测试表明，使用分压工具后，采油率提高了2.54％。研究结果对解决层间矛盾，提高采收率具有重要意义。
更新日期：2019-12-18
中文翻译：
分压工具中流动剂流动特性及结构参数优化的实验与数值模拟研究
为了解决驱油过程中储层非均质性的问题，大庆油田提出了一种分压注入技术（利用分压工具）。分压工具可以通过降低驱替剂的压力和调节驱替剂在高渗透油层中的注入量来改善整体驱油效果。为了研究分压工具对聚合物溶液的影响，通过有限元分析研究了分压工具中聚合物溶液的流动特性，并通过实验室实验对数值模拟结果进行了比较和验证。然后，通过正交试验选择了分压工具的最佳结构参数。最后，进行了现场测试，以验证分压工具的有效性。结果表明，当流量为10 m时3 / d，聚合物溶液的压降达到6.08×10 5 Pa，粘度损失率达到6.69％，而溶液的物理参数在分压工具的作用下周期性变化。在低流量下，实验室实验和数值模拟的结果非常吻合，并且选择了分压工具的最佳结构参数。现场测试表明，使用分压工具后，采油率提高了2.54％。研究结果对解决层间矛盾，提高采收率具有重要意义。
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