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重质原油在圆管内由变压力梯度导致的流动及热流固耦合分析
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Abstract:
原油作为重要的能源和战略资源，在日常生活、工业、农业等领域有着广泛的应用，因此原油的需求量持续增加。为了提高石油采收率(EOR)，深入研究重质原油在管道中的流动传热问题具有重要意义。本文探讨了热水开采时抽油泵内重质原油的流动传热问题。根据稠油的流变学实验数据，证实重质原油符合幂律流体本构方程；建立了重质原油在杆式抽油泵内的流动传热模型；首次采用有限差分方法求解了幂律方程的数值解，分析了杆式抽油泵热采温度Tw、抽油泵壁的厚度c、杆式抽油泵冲程次数n1以及幂律指数n对流量Q的影响，建立了杆式抽油泵热采重质原油的最优方案。
As an important energy and strategic resource, crude oil has a wide range of applications in daily life, industry, agriculture and other fields, so the demand for crude oil continues to increase. It is of great significance to conduct in-depth research on the flow and heat transfer of heavy crude oil in pipelines in order to improve oil recovery (EOR). This article explores the flow and heat transfer of heavy crude oil in the oil pump during hot water extraction. According to the rheological experimental data of heavy oil, it is confirmed that heavy crude oil conforms to the power-law fluid constitutive equation; A flow and heat transfer model for heavy crude oil in a rod pump was established; For the first time, the finite difference method was used to solve the numerical solution of the power-law equation. The effects of the thermal recovery temperature Tw of the rod pump, the thickness c of the pump wall, the number of strokes n1 of the rod pump, and the power-law exponent n on the flow rate Q were analyzed, and the optimal scheme for thermal recovery of heavy crude oil by the rod pump was established.
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