Method of using a combination lignosulfonate/polyalkylene glycol system as a sacrificial agent for surfactant flooding
Patent
·
OSTI ID:5118857
This patent describes a method of recovering hydrocarbons from a subterranean hydrocarbon formation which is penetrated by at least one injection well and at least one production well wherein a surfactant system is injected into the formation to sweep oil through the formation to at least one production well. It comprises injecting into the formation a surfactant solution containing about 0.11% to about 10% by weight of a mixture of at least two sacrificial agents designed to prevent the loss to the formation of injected chemicals of a surfactant solution, the mixture of at least two sacrificial agents comprised of about 0.1% to about 5% by weight of a lignosulfonate and about 0.01% to about 5% by weight of a polyalkylene glycol having a molecular weight less than about 2000.
- Assignee:
- Texaco, Inc., White Plains, NY (USA)
- Patent Number(s):
- US 5009268; A
- Application Number:
- PPN: US 7-459611
- OSTI ID:
- 5118857
- Country of Publication:
- United States
- Language:
- English
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