Enhancement of CO2 trapping efficiency in heterogeneous reservoirs by water-alternating gas injection
MetadataShow full item record
© 2018 Society of Chemical Industry and John Wiley & Sons, Ltd. Carbon geosequestration efficiency is affected by various factors including reservoir heterogeneity, caprock properties, rock wettability, aquifer brine salinity and injection-well configuration. Some parameters (e.g. the formation geology) cannot be changed but it is possible to select others and engineer an optimized storage program. One of these parameters is the way CO2is injected into the reservoir. There are three main options for this: (1) continuous injection, (2) intermittent injection, and (3) water-alternating gas (WAG) injection. We thus studied the efficiency of each injection option and predicted the associated storage capacities and CO2-plume movements (which are related to the containment security). We found that WAG injection showed significantly superior behavior over continuous and intermittent injections (which resulted in similar CO2flow responses). Specifically, residual and solubility trapping were significantly enhanced, whereas vertical CO2migration was cut by approximately two-thirds. Thus, in the examined reservoir, the WAG injection is preferred as it strongly enhances CO2storage efficiency and containment security. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.
Showing items related by title, author, creator and subject.
Al-Abri, Abdullah S. (2011)Perhaps no other single theme offers such potential for the petroleum industry and yet is never fully embraced as enhanced hydrocarbon recovery. Thomas et al. (2009, p. 1) concluded their review article with “it appears ...
Enhanced Natural Gas and Condensate Recovery by Injection of Pure SCCO2, Pure CH4 and their Mixtures: Experimental InvestigationAl-Abri, Abdullah; Sidiq, Hiwa; Amin, Robert (2010)This paper quantitatively investigates the fractional condensate recovery and relative permeability following supercritical carbon dioxide (SCCO2) injection, methane injection and the injection of their mixtures; and ...
Experimental investigation of the velocity-dependent relative permeability andsweep efficiency of supercritical CO2 injection into gas condensate reservoirsAl-Abri, Abdullah; Sidiq, Hiwa; Amin, Robert (2009)This paper presents a laboratory investigation of the velocity-dependent relative permeability (VDRP) and recovery efficiency of supercritical CO2 injection into gas condensate reservoirs for enhanced recovery purposes. ...