Process for treating earth formations to be relatively inpermeable to formation water
Patent
·
OSTI ID:6491525
In a method for treatment of earth formations to make them relatively impermeable to formation water, high pH water is introduced through the bore into the formation under sufficient pressure to force the formation water out of the formation being treated. Thereafter, a high pH additive solution is introduced into the formation through the well bore. The pH of the additive solution is lowered in situ to precipitate the additive in the formation, thus shutting off the flow of water from the formation into the well. The additive is a tannin obtained from flavotannins, gallotannins, and mixed tannins. (7 claims)
- Assignee:
- Phillips Petroleum Co.
- Patent Number(s):
- US 3291212
- OSTI ID:
- 6491525
- Resource Relation:
- Patent File Date: Filed date 27 May 1963
- Country of Publication:
- United States
- Language:
- English
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