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dc.contributor.author | Pu W.f. | |
dc.contributor.author | Du D.j. | |
dc.contributor.author | Wang S. | |
dc.contributor.author | Zeng L. | |
dc.contributor.author | Feng R. | |
dc.contributor.author | Memon S. | |
dc.contributor.author | Sarout J. | |
dc.contributor.author | Varfolomeev M.A. | |
dc.contributor.author | Sarmadivaleh M. | |
dc.contributor.author | Xie Q. | |
dc.date.accessioned | 2022-02-09T20:34:23Z | |
dc.date.available | 2022-02-09T20:34:23Z | |
dc.date.issued | 2021 | |
dc.identifier.issn | 0920-4105 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/169111 | |
dc.description.abstract | To reveal the enhanced oil recovery (EOR) potential of CO2 huff-n-puff in fractured tight conglomerate reservoirs, hydraulic fracturing combined with CO2 huff-n-puff experiments were conducted using a true triaxial stress cell core fracturing and displacement system. To better understand the potential mechanisms behind CO2 huff-n-puff, the change in rock properties and formation water properties caused by the interactions among supercritical CO2/formation water/oil/rock were investigated. Experimental results demonstrate that CO2 huff-n-puff is viable to boost oil recovery in tight conglomerate reservoirs with recovery factor of 23.2% after hydraulic fracturing and depletion process. Rock surface morphology, mineralogical composition and formation water composition analysis indicate that supercritical CO2 leads the water-oil-rock system to more water-wet by increasing rock surface roughness. Geochemical simulation results combining the surface complexation and ion-exchange shows that supercritical CO2 weakens the crude oil adsorption on rock surface, which also contributes to the oil recovery increment. These results reveal the EOR feasibility of CO2 huff-n-puff in fractured tight conglomerate reservoirs, and provide insights to characterize geochemical features of carbonated brine/oil/rock. | |
dc.relation.ispartofseries | Journal of Petroleum Science and Engineering | |
dc.subject | CO huff-n-puff 2 | |
dc.subject | EOR | |
dc.subject | Geochemical properties | |
dc.subject | Ion exchange | |
dc.subject | Tight conglomerate reservoirs | |
dc.title | Experimental study of CO<inf>2</inf> huff-n-puff in a tight conglomerate reservoir using true triaxial stress cell core fracturing and displacement system: A case study | |
dc.type | Article | |
dc.relation.ispartofseries-volume | 199 | |
dc.collection | Публикации сотрудников КФУ | |
dc.source.id | SCOPUS09204105-2021-199-SID85099611736 |