Experimental identification of CO₂-oil-brine-rock interactions: Implications for CO₂ sequestration after termination of a CO₂-EOR project

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• 作者：Miao Yu^a ; ^b ; ^{yumiao0950@163.com} ; Li Liu^b ; ^{liuli0892@vip.sina.com} ; Siyu Yang^c ; ^{yangsiy@petrochina.com.cn} ; Zhichao Yu^c ; ^{yuzhichao012@2008.sina.com} ; Shi Li^c ; ^{pvt@petrochina.com.cn} ; Yongzhi Yang^c ; ^{yangyongzhi@petrochina.com.cn} ; Xuefa Shi^a ; ^{xfshi@fio.org.cn}
• 关键词：CO2&ndash ; oil&ndash ; brine&ndash ; rock interaction ; Permeability ; Wettability ; CCUS ; Songliao basin
• 刊名：Applied Geochemistry
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：75
• 期：Complete
• 页码：137-151
• 全文大小：4877 K
• 卷排序：75

文摘

CO2-rich fluid remained the active fluid controlling the interaction processes in an oil undersaturated sandstone reservoir. Mineral dissolution rates were reduced in the case that exposed mineral surface areas were coated with oil. Mineral wettability, oil saturation, and mineral content were the main controls on the surface area exposure of minerals. Core permeability decreased substantially after the injection of CO2.