Phase change material microcapsules used for cooling of ultra-deep oil/gas and geothermal drilling fluids

IF 3.5 Q2 ENERGY & FUELS

Petroleum Pub Date : 2025-08-01 DOI:10.1016/j.petlm.2025.07.006

Zehua Chen , Wenjian Yue , Chao Xiong , Jingping Liu , Chengwen Wang

{"title":"Phase change material microcapsules used for cooling of ultra-deep oil/gas and geothermal drilling fluids","authors":"Zehua Chen , Wenjian Yue , Chao Xiong , Jingping Liu , Chengwen Wang","doi":"10.1016/j.petlm.2025.07.006","DOIUrl":null,"url":null,"abstract":"<div><div>Phase-change material (PCM) has a high potential to cool the drilling fluids for ultra-deep oil/gas wells and geothermal wells to ensure efficient drilling and resource exploitation. Because PCM tends to agglomerate and seriously affect the properties of drilling fluid, it is necessary that the PCM is protected by a shell on its surface. In this study, a novel microencapsulated PCM (with a phase transition temperature of 130.5 °C) with a SiO<sub>2</sub> protection shell were obtained by using tetraethyl orthosilicate (TEOS) as silicon source via a sol-gel process. PCM microcapsules with optimal synthesis ratio of 3:4 have excellent warm blood characteristics and smooth shell. The addition of 5 wt% PCM microcapsules for accurate heat trapping and temperature control at 130 °C effectively delays the time of drilling fluid reaching 150 °C by 42.5%, which improves the operability of drilling fluid at high cycle temperature. The results of this study can provide useful insights and information for use of PCM in ultra-deep oil/gas and geothermal wells.</div></div>","PeriodicalId":37433,"journal":{"name":"Petroleum","volume":"11 4","pages":"Pages 465-474"},"PeriodicalIF":3.5000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Petroleum","FirstCategoryId":"1087","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2405656125000562","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}

引用次数: 0

Abstract

Phase-change material (PCM) has a high potential to cool the drilling fluids for ultra-deep oil/gas wells and geothermal wells to ensure efficient drilling and resource exploitation. Because PCM tends to agglomerate and seriously affect the properties of drilling fluid, it is necessary that the PCM is protected by a shell on its surface. In this study, a novel microencapsulated PCM (with a phase transition temperature of 130.5 °C) with a SiO₂ protection shell were obtained by using tetraethyl orthosilicate (TEOS) as silicon source via a sol-gel process. PCM microcapsules with optimal synthesis ratio of 3:4 have excellent warm blood characteristics and smooth shell. The addition of 5 wt% PCM microcapsules for accurate heat trapping and temperature control at 130 °C effectively delays the time of drilling fluid reaching 150 °C by 42.5%, which improves the operability of drilling fluid at high cycle temperature. The results of this study can provide useful insights and information for use of PCM in ultra-deep oil/gas and geothermal wells.

查看原文本刊更多论文

用于冷却超深层油气和地热钻井液的相变材料微胶囊

相变材料（PCM）在超深油气井和地热井的钻井液冷却方面具有很大的潜力，可以保证钻井和资源的高效开发。由于PCM容易结块，严重影响钻井液的性能，因此有必要在PCM表面加一层保护层。本研究以正硅酸四乙酯（TEOS）为硅源，采用溶胶-凝胶法制备了一种具有SiO2保护壳的新型微封装PCM（相变温度为130.5℃）。PCM微胶囊的最佳合成比为3:4，具有优良的温血特性和光滑的外壳。加入5 wt%的PCM微胶囊，在130°C下进行精确的热捕获和温度控制，有效地将钻井液达到150°C的时间延迟了42.5%，提高了钻井液在高循环温度下的可操作性。研究结果可为PCM在超深油气井和地热井中的应用提供有益的见解和信息。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Petroleum Earth and Planetary Sciences-Geology

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

124 days

期刊介绍： Examples of appropriate topical areas that will be considered include the following: 1.comprehensive research on oil and gas reservoir (reservoir geology): -geological basis of oil and gas reservoirs -reservoir geochemistry -reservoir formation mechanism -reservoir identification methods and techniques 2.kinetics of oil and gas basins and analyses of potential oil and gas resources: -fine description factors of hydrocarbon accumulation -mechanism analysis on recovery and dynamic accumulation process -relationship between accumulation factors and the accumulation process -analysis of oil and gas potential resource 3.theories and methods for complex reservoir geophysical prospecting: -geophysical basis of deep geologic structures and background of hydrocarbon occurrence -geophysical prediction of deep and complex reservoirs -physical test analyses and numerical simulations of reservoir rocks -anisotropic medium seismic imaging theory and new technology for multiwave seismic exploration -o theories and methods for reservoir fluid geophysical identification and prediction 4.theories, methods, technology, and design for complex reservoir development: -reservoir percolation theory and application technology -field development theories and methods -theory and technology for enhancing recovery efficiency 5.working liquid for oil and gas wells and reservoir protection technology: -working chemicals and mechanics for oil and gas wells -reservoir protection technology 6.new techniques and technologies for oil and gas drilling and production: -under-balanced drilling/gas drilling -special-track well drilling -cementing and completion of oil and gas wells -engineering safety applications for oil and gas wells -new technology of fracture acidizing