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Experimental investigation of CO2 WAG injection to light crude oil in near miscible conditions

Shahrokhi, O ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.3997/2214-4609.20148641
  3. Publisher: European Association of Geoscientists and Engineers, EAGE , 2012
  4. Abstract:
  5. This work concerns with experimental investigation of CO2 WAG injection to light crude oil in near miscible conditions which has been rarely attended in the available literature. Here, several core flood experiments at three constant injection rates and four WAG ratios are conducted on sandstone rocks saturated with light crude oil in presence of saline water. The results showed that higher injection rate has a better performance regarding oil recovery for smaller PVs of injected fluids, while lower injection rate showed higher ultimate recovery for a 30% increase in injected PVs. Secondary continuous gas injection showed a superior performance than all the other WAG injections in different ratios but for a 50% higher injected gas volumes. Also it has been found that WAG ratio of 1 maximizes the oil recovery. Finally in near miscible conditions, low permeable core showed an ultimate recovery as high as the high permeable sample. The results of this work can be helpful to better understanding the role of WAG parameters on the performance of CO2 WAG injection at near miscible conditions for light oil reservoirs
  6. Keywords:
  7. Carbon dioxide ; Crude oil ; Oil shale ; Oil well flooding ; Petroleum reservoir engineering ; Petroleum reservoir evaluation ; Petroleum reservoirs ; Saline water ; Well flooding ; Better performance ; Continuous gas injections ; Core flood experiments ; Experimental investigations ; Injected fluids ; Injection rates ; Light oil reservoirs ; Low permeable core ; Water injection
  8. Source: 74th European Association of Geoscientists and Engineers Conference and Exhibition 2012 Incorporating SPE EUROPEC 2012: Responsibly Securing Natural Resources, 4 June 2012 through 7 June 2012 ; 2012 , Pages 3914-3918 ; 9781629937908 (ISBN)
  9. URL: http://earthdoc.eage.org/publication/publicationdetails/?publication=59538