Miscible flood may capture 95% of crude in place
A miscible-flood project that may recover as much as 95% of the oil originally in place is now in operation in Imperial Oil Ltd.'s Golden Spike South D-3A pool, Alberta, Can. A base map of the area is shown. Tests show that solvent injected into the reservoir at the contact between the oil zone and the gas cap will spread over the entire oil zone in a little over 2 yr. A total of 28-1/2 million bbl of solvent will be needed to provide the bank necessary to miscibly displace the oil, according to calculations. To get this volume of LP-gas in the shortest possible time, Imperial is cycling oil. Wells are being produced at rates far in excess of market demand; the production is being processed for removal of solution gas and light ends; the CD2U to CD4U fraction is being split out, and oil and dry gas are reinjected into the oil zone. The continuous vertical permeability permits operation of a gravity- controlled system in this pool, for a total recovery of 302 million stock tank bbl oil. A sandstone flow model was used to demonstrate that in a gravity-controlled system a solvent slug with a 60% CD2U to CD4U composition will recover 100% of the oil in place.
- OSTI ID:
- 6685467
- Journal Information:
- Oil Gas J.; (United States), Journal Name: Oil Gas J.; (United States) Vol. 63:30; ISSN OIGJA
- Country of Publication:
- United States
- Language:
- English
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Solvent flood promises 95% oil recovery
Solvent flood promises 95% oil recovery