电加热气举井井筒瞬态换热模型及其应用

A transient heat flow model for gas lift wellbore with electric heating

郭迎春 韩国庆 孙渡 王玮 吴晓东

GUO Yingchun HAN Guoqing SUN Du WANG Wei WU Xiaodong

中国石化胜利油田有限公司地质科学研究院，山东东营　257015 中国石油大学石油工程教育部重点实验室，北京　102249

Geoscience Research Institute, Shengli Oilfield Co., SINOPEC, Dongying 257015, China MOE Key Laboratory of Petroleum Engineering in China University of Petroleum, Beijing 102249,China

电加热是高凝油藏井筒降黏的重要手段，在环空流体流动的情况下无法利用常规井筒静态换热模型优化电加热参数和加热周期。采用漂移模型描述井筒中的气液两相流动、在Hasan-Kabir 模型的基础上考虑电缆换热和环空注入气体换热的影响，建立了多热源条件下的井筒瞬态换热模型。对电加热气举井优化分析表明，该模型可以预测不同加热周期、不同注气参数情况下的井筒、环空内的温度、压力、持液率等参数的瞬态变化，不但可以用于周期性电加热油井，也可以用于其他多热源、多相流动的油井。

Electric heating is an important practice to reduce fluid viscosity in wellbore for waxy crude field. Therefore, it is challenging to optimize the electric heating parameters with fluid flowing in annulus. Through transient heat transfer model based on Hasan-Kabir’s equations, a new numerical simulator was built to model such a multiphase, multi-heat sources production system including an inner annulus inside tubing as the electrical able installed, and an outer annulus where the gas is injected. This model and application for gas-lift assisted wells were presented. The results indicate that the new model is able to simulate the multi-interface heat transfer under transient condition. The presented model not only satisfies the exceptional modeling requirements for periodically-heating crude producers, but also it is appropriate for other heat transfer investigations under transient multi-interface and multiphase flow condition.

10.13639/j.odpt.2015.02.019