Stabilizing agent for profile control gels and polymeric gels of improved stability
This patent describes a process for recovering oil from a subterranean oil-bearing formation having relatively high permeability zones and relatively low permeability zones penetrated by at lest one injection well and at least one production well in fluid communication with a substantial portion of the formation. It comprises: injecting into the relatively high permeability zones of the formation via the injection well an aqueous gel-forming solution comprising water, a vicosifying amount of a water-dispersible polymer; a crosslinking agent in an amount effective to cause gelation of the aqueous solution of the water-dispersible polymer; and a stabilizing agent comprising a heterocyclic compound in an amount effective to reduce syneresis of the gel-forming composition, whereby upon gelation of the solution the zones of relatively high permeability of the formation are selectively plugged; injecting a flooding fluid into the formation via the injection well that preferentially enters the low permeability zones; and recovering fluids including oil from the formation via the production well.
- Assignee:
- Mobil Oil Corp., New York, NY (USA)
- Patent Number(s):
- US 4928766; A
- Application Number:
- PPN: US 7-311303A
- OSTI ID:
- 6744672
- Country of Publication:
- United States
- Language:
- English
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