Well treatment to remove permeability block
Patent
·
OSTI ID:6951501
This is a method of restoring production from wells from which production has decreased or stopped altogether due to the formation of an emulsion block around the well bore wherein a viscous emulsion of oil and water is formed through which neither connate water nor oil can penetrate. The treating surfactants consist of an injected emulsion to break the emulsion in the formation. The injected emulsion consists of a mixture of nonionic, water-soluble surfactant and an anionic surfactant with between 1-8 volumes of oil to each volume of water. The cloud-point temperature range of the nonionic surfactant will be from 0-20$F lower than the formation temperature. The ratio of the nonionic surfactant and the anionic surfactant is from 0.25-4 volume % relative to the volume of the water in the emulsion. A film-strengthening agent in the amount of 0-4% by weight of water may be added. (6 claims)
- Assignee:
- TUL; EDB-81-030810
- Patent Number(s):
- US 3185217
- OSTI ID:
- 6951501
- Country of Publication:
- United States
- Language:
- English
Similar Records
Well stimulation
Method of removing permeability blocks
Reducing permeability of highly permeable zones in underground formations
Patent
·
Mon Jan 30 23:00:00 EST 1967
·
OSTI ID:6353447
Method of removing permeability blocks
Patent
·
Mon Jun 28 00:00:00 EDT 1971
·
OSTI ID:5721410
Reducing permeability of highly permeable zones in underground formations
Patent
·
Tue Sep 27 00:00:00 EDT 1988
·
OSTI ID:6688329