Optimum oil recovery for carbon dioxide injection
Patent
·
OSTI ID:6217768
It is an object of the present invention to utilize the unique phase behavior and physical properties of carbon dioxide with reservoir crude oil under specific conditions of temperature and pressure to enhance miscible displacement of oil from subterranean reservoirs. The carbon dioxide is injected into the subterranean oil reservoir to maintain a reservoir pressure between about 1 and about 250 psi above the bubble point pressure of the reservoir crude oil. Under predetermined conditions of temperature and pressure, the carbon dioxide miscible gas recovery provides for an extremely efficient displacement of the reservoir crude oil. It has been found that at pressures slightly above the bubble point pressure of the reservoir fluid, the rate of solubility of the carbon dioxide in the reservoir fluid is much higher and recovery of oil is more efficient. (4 claims)
- Assignee:
- Cities Service Oil Co.
- Patent Number(s):
- US 3620304
- OSTI ID:
- 6217768
- Country of Publication:
- United States
- Language:
- English
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