Oil recovery performance and permeability reduction mechanisms in miscible CO₂ water-alternative-gas (WAG) injection after continuous CO₂ injection: An experimental investigation and modeling approach

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• 作者：Zhilin Wang^a ; Shenglai Yang^a ; Hao Lei^a ; ^{leihaojs89@126.com} ; Mengshi Yang^b ; Lvwei Li^c ; Song Yang^b
• 关键词：CO2 water-alternating-gas (CO2&ndash ; WAG) ; Permeability reduction ; Asphaltene deposition ; Inorganic deposition ; Solubility model
• 刊名：Journal of Petroleum Science and Engineering
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：150
• 期：Complete
• 页码：376-385
• 全文大小：1540 K
• 卷排序：150

文摘

CO2-WAG injection process was studied using a composite long-coreflooding apparatus. The permeability reduction due to asphaltene precipitation and inorganic deposition were mainly taken placed in the middle and rear of core plug. The permeability reduction due to asphaltene precipitation was higher than that caused by inorganic deposition.