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

作　　者：郭迎春[1] 韩国庆[2] 孙渡[1] 王玮[1] 吴晓东[2] 

机构地区：[1]中国石化胜利油田有限公司地质科学研究院,山东东营257015 [2]中国石油大学石油工程教育部重点实验室,北京102249

出　　处：《石油钻采工艺》2015年第2期70-73,共4页Oil Drilling & Production Technology

基　　金：国家科技重大专项"胜利油田薄互层低渗透油田开发示范工程"编号:(2011ZX05051)

摘　　要：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 ischallenging to optimize the electric heating parameters with fluid flowing in annulus. Through transient heat transfer model basedon Hasan-Kabir’s equations, a new numerical simulator was built to model such a multiphase, multi-heat sources production systemincluding an inner annulus inside tubing as the electrical able installed, and an outer annulus where the gas is injected. This model andapplication for gas-lift assisted wells were presented. The results indicate that the new model is able to simulate the multi-interface heattransfer under transient condition. The presented model not only satisfies the exceptional modeling requirements for periodically-heatingcrude producers, but also it is appropriate for other heat transfer investigations under transient multi-interface and multiphase flowcondition.

关 键 词：井筒降黏 瞬态换热模型 环空流动 多热源 电加热 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]