E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/31, 166/33
E21B 43/22 (2006.01) E21B 43/16 (2006.01)
Patent
CA 1151063
ENHANCED OIL RECOVERY EMPLOYING BLEND OF CARBON DIOXIDE INERT GAS AND INTERMEDIATE HYDROCARBONS (PR 5210) (D#77,149-F) ABSTRACT OF THE DISCLOSURE Oil may be recovered from dipping reservoirs by a conditionally miscible oil recovery process in which a gaseous, carbon dioxide-containing fluid is injected up-dip to displace petroleum downward in a conditionally miscible, gravity-stabilized displacement process. Carbon di- oxide-containing blending stock is mixed with an inert gas such as methane or nitrogen in order to reduce its density sufficiently to increase the critical velocity of the dis- placement process. By increasing the critical velocity, the time required to deplete a reservoir is decreased signifi- cantly. Sufficient intermediate hydrocarbons are added to the mixture of carbon dioxide and inert gas to insure that the mixture injected into the formation is conditionally miscible at formation temperature and pressure. -1-
376347
Gowling Lafleur Henderson Llp
Texaco Development Corporation
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