采油井沿线温度分布数学模型

Shahnaz N. Shahbazova, Ab.G. Rzayev, R. Asadova, K.M. Jabiyev
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摘要

本文对采油井(OPW)沿线的传热和温度分布(TD)进行了系统分析。分析表明,现有的数学模型仅适用于确定套管串(CS)长度上的温度分布,而不适用于确定油管运行长度上的温度分布,因为(CS 和油管之间的)环形界面上存在流体层和气体层,其热容量和导热系数与 CS 周围岩石的热容量和导热系数相差很大。鉴于上述情况,考虑到环形空间中的流体层和气体层对从上行流体流到油管壁以及从油管壁到界面环形空间的热传递的影响,建立了数学模型。为确保所获模型的技术有效性,给出了定量估算流体流向周围环境传热的公式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A mathematical model of temperature distribution along the length of the oil production well
The paper gives a systems analysis in the field of heat transfer and temperature distribution (TD) along the length of oil production wells (OPW). The analysis shows that the existing mathematical models are suitable only for determining TD along the length of casing string (CS) and are not suitable for determining TD along the length of the tubing run, since the existence of the interfacial (between the CS and the tubing) annulus of the fluid and gas layers with heat capacity and thermal conductivity that differ significantly from the heat capacity and thermal conductivity of rocks surrounding the CS. Given the above, mathematical models taking into account the impact of the fluid and gas layers in the annulus on the heat transfer from the upward fluid flow to the tubing wall and from the wall to the interfacial annulus are developed. To ensure the technological effectiveness of the obtained model, formulas for quantitative estimation of the heat transfer of the fluid flow into the surrounding environment are given.
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