Wells – Processes – Distinct – separate injection and producing wells
Patent
1975-05-06
1977-03-15
Purser, Ernest R.
Wells
Processes
Distinct, separate injection and producing wells
E21B 4322
Patent
active
040119084
ABSTRACT:
A process for recovering oil from subterranean petroleum reservoirs in which there are successively injected into the reservoir (1) an aqueous alkaline alkali metal silicate solution, (2) a micellar solution, and (3) an aqueous drive fluid; and wherein oil is recovered from one or more production wells spaced apart in the reservoir from the injection well. The micellar solution can be a substantially anhydrous soluble oil, a soluble oil containing water present in the form of a water-in-oil microemulsion, a water-external microemulsion, or an aqueous micellar surfactant solution. Additionally, the micellar solution can be a substantially anhydrous soluble oil or a soluble oil containing water present in the form of a water-in-oil microemulsion followed by a water-external microemulsion.
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Hartman Richard C.
Purser Ernest R.
Sandford Dean
Union Oil Company of California
Vanderburgh John E.
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