{"title":"Improving oil well cement strengths through the coupling of metakaolin and nanosilica","authors":"Petro Ezekiel Mabeyo","doi":"10.1016/j.upstre.2021.100048","DOIUrl":null,"url":null,"abstract":"<div><p><span>The research study aimed to investigate the effect of coupled metakaolin and nano-silica (nano-SiO</span><sub>2</sub><span>) on improving the compressive and shear bond strengths of class G oil well cement. Samples curing was done at 80 °C for 3, 7, 14, and 28 days. XRD and TG-DSC techniques were used for cement phase characterization. The results indicated that the cement system with 2% nano-SiO</span><sub>2</sub><span><span> and 20% metakaolin increased the compressive strength by 20.0 and 21.4%, and shear bond strength by 205.5 and 90.8% for 3 and 28 days, respectively. This means the </span>synergistic effect is more significant for cement-formation bond strength development. The results of this study, therefore, points to a potential ternary cement system for durable oil wells.</span></p></div>","PeriodicalId":101264,"journal":{"name":"Upstream Oil and Gas Technology","volume":"7 ","pages":"Article 100048"},"PeriodicalIF":2.6000,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.upstre.2021.100048","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Upstream Oil and Gas Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666260421000189","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 4
Abstract
The research study aimed to investigate the effect of coupled metakaolin and nano-silica (nano-SiO2) on improving the compressive and shear bond strengths of class G oil well cement. Samples curing was done at 80 °C for 3, 7, 14, and 28 days. XRD and TG-DSC techniques were used for cement phase characterization. The results indicated that the cement system with 2% nano-SiO2 and 20% metakaolin increased the compressive strength by 20.0 and 21.4%, and shear bond strength by 205.5 and 90.8% for 3 and 28 days, respectively. This means the synergistic effect is more significant for cement-formation bond strength development. The results of this study, therefore, points to a potential ternary cement system for durable oil wells.
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