Galactomannnan gum-based composition for sealing permeable formations
It is often desirable to temporarily seal or plug a permeable formation such as those located in a subterranean formation penetrated by an opening, e.g., borehole, so that other less permeable zones can be treated (i.e., fractured, acidized, etc.). Many methods and compositions have been employed for temporarily plugging or sealing these openings and passageways. A composition is provided which may be employed for the selective sealing of permeable formations. The composition contains at least one particulate galactomannan gum which has been treated to render the gum hydrophobic in aqueous solutions having a pH of at least about 7.5; a pH control agent, and a water-soluble organic polymeric suspending agent. (15 claims)
- Assignee:
- Dow Chemical Co.
- Patent Number(s):
- US 3743613
- OSTI ID:
- 6985740
- Country of Publication:
- United States
- Language:
- English
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