Simultaneous microemulsion-aqueous phase flooding process
Patent
·
OSTI ID:6557785
A method of enhanced oil recovery is disclosed wherein an upper-phase or a middle-phase microemulsion and an immiscible aqueous phase are simultaneously injected into a subterranean formation. The viscosities of the injected phases are adjusted so that the aqueous phase/microemulsion viscosity ratio approximates the reservoir brine/oil viscosity ratio. The injection rates of the injected phases are such that similar oil, microemulsion and aqueous phase velocities are achieved in the reservoir. Oil is displaced to a production well and recovered.
- Assignee:
- Exxon Production Research Co
- Patent Number(s):
- US 4240504
- OSTI ID:
- 6557785
- Country of Publication:
- United States
- Language:
- English
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