Abstract
CO2-EOR offshore, has the benefit of CO2 storage in addition to EOR. CO2 flooding in the offshore groups of reservoirs, will be different from the past experience of CO2 flooding onshore. Offshore developments are characterised by fewer wells, larger well spacing and higher rates per well. In this study, different aspects of CO2 flooding in these two groups of reservoirs are identified and compared, and possible opportunities for CO2 flooding offshore are identified. To evaluate potential differences, CO2 flooding in a geological model was simulated under two different development scenarios (offshore vs onshore). Results show that both models are similarly affected by gravity. Offshore, because of larger inter well spacing, a greater degree of heterogeneity can be identified between well pairs. This makes the flow pattern more stable offshore which means that flow correcting mechanisms will be required to a lesser extent offshore. The requirement for compression is also greater offshore. There are positive consequences for CO2 flooding offshore. The microscopic sweep efficiency increases due to higher miscibility development; the density difference between CO2 and other reservoir fluids decreases and net CO2 utilisation efficiency will be higher. This makes offshore reservoirs better candidates for coupled EOR and CCS CO2 flooding.
Original language | English |
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Title of host publication | 19th European Symposium on Improved Oil Recovery |
Subtitle of host publication | Sustainable IOR in a Low Oil Price World |
Publisher | EAGE Publishing BV |
ISBN (Electronic) | 9789462822092 |
DOIs | |
Publication status | Published - 24 Apr 2017 |
Event | 19th European Symposium on Improved Oil Recovery: Price World Sustainable IOR in a Low Oil - Stavanger, Norway Duration: 24 Apr 2017 → 27 Apr 2017 |
Conference
Conference | 19th European Symposium on Improved Oil Recovery |
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Abbreviated title | IOR NORWAY 2017 |
Country/Territory | Norway |
City | Stavanger |
Period | 24/04/17 → 27/04/17 |
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology