助剂对电磁原位加热稠油储层温度分布的影响  

Effects of Additives on Temperature Distribution of Heavy Oil Reservoirs during Electromagnetic In-Situ Heating

作　　者：肖界先 高德利[1] 王正旭 Xiao Jiexian;Gao Deli;Wang Zhengxu(MOE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing);CNPC Engineering Technology R&,D Company Limited)

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室 [2]中国石油集团工程技术研究院有限公司

出　　处：《石油机械》2023年第2期72-78,137,共8页China Petroleum Machinery

基　　金：国家自然科学基金创新研究群体项目“复杂油气井钻井与完井基础研究”(51821092);国家自然科学基金重点项目“页岩和致密油气田高效开发建井基础研究”(U1762214);国家重点研发计划项目“注采工程安全控制与井眼完整性评价技术”(2018YFB0605502)。

摘　　要：为了解决电磁原位加热导热、导电性能差的稠油储层时存在温度偏低的问题,提出了基于助剂注入的电磁原位加热技术,并建立了考虑稠油储层热性质随温度动态变化的电热耦合数学模型,开展了电磁加热室内试验以验证数学模型的准确性,比较了助剂注入前、后储层的电场和温度分布以评估电磁加热性能,最后分析了助剂导电和导热性质对储层温度分布的影响规律。研究结果表明:室内试验证实了电热耦合数学模型的准确性,助剂注入后电磁原位加热稠油储层的温度明显升高;在一定径向范围内,助剂电导率的增大有助于提高储层温度;储层径向温度随着助剂比热容和导热系数的减小而升高。研究结果证实了基于助剂注入的电磁原位加热技术在解决加热温度偏低的问题上可行。To solve the problem of low temperature during the electromagnetic in-situ heating of heavy oil reservoirs with low thermal and electrical conductivity,an electromagnetic in-situ heating technology based on additive injection was proposed,and correspondingly,an electro-thermal-coupled mathematical model,considering the dynamic variation of thermal properties of heavy oil reservoirs with changing temperature,was developed.The electromagnetic heating laboratory test was carried out to verify the accuracy of the presented mathematical model,and the electrical fields and temperature distributions of the reservoir before and after additive injection were compared to evaluate the performance of electromagnetic heating.Finally,the influences of electrical and thermal properties of additives on the reservoir temperature distribution were analyzed.The research results show that the accuracy of the electro-thermal coupled mathematical model is verified by the laboratory tests.After injecting the additives,the temperature of the heavy oil reservoir under electromagnetic in-situ heating increases significantly.Within a certain radial range,the increased conductivity of additives helps to raise the reservoir temperature,and the radial temperature of the reservoir climbs up with the decreasing specific heat capacity and thermal conductivity of additives.This research demonstrates the feasibility of the electromagnetic in-situ heating technology based on additive injection to solve the low heating temperature problem.

关 键 词：稠油开采 电磁原位加热 助剂注入 模拟试验 温度分布 电热耦合 

分 类 号：TE345[石油与天然气工程—油气田开发工程]