Impact of Microannulus on the Heat Exchange at the Bottomhole

Author:

Santos Livio1,Dahi Taleghani Arash1

Affiliation:

1. Pennsylvania State University

Abstract

Abstract Every injection and production operation are accompanied by heat transfer between the wellbore fluids and the formation. Often these fluids are only circulated inside the wellbore. However, the presence of microannulus, besides compromising wellbore integrity, could have a negative impact on the rate of heat transfer to and from the formation. Thermal conductivity could be critical in CO2 sequestration, thermal EOR and specially closed-loop geothermal wells. This study aims to evaluate the impact of microannulus on the heat exchange rate at the bottomhole by combining numerical results and field measurements. We propose to identify presence of microannulus by analyzing distributed temperature sensing (DTS) measurements acquired at different times from EOR and closed-loop geothermal wells. In a DTS system, temperatures are recorded continuously along an optical sensor cable placed in the wellbore. The analysis is combined with numerical simulations considering different operational conditions to estimate the severity of the microannulus. In extreme cases, the presence of microannulus was found to decrease the bottomhole temperature in 2.5%. The results also highlight the importance of proper cementing design to ensure wellbore integrity and avoid heat loss.

Publisher

SPE

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3