Oil based compositions for sealing subterranean zones and methods
AssigneeHalliburton Energy Services, Inc.
InventorsRonald E. Sweatman, Archie J. Felio, James F. Heathman
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Abstract
The present invention provides oil based compositions and methods of using the compositions for sealing subterranean zones. The compositions are basically comprised of oil, a hydratable polymer, an organophillic clay and a water-swellable clay.
Claims23
A composition for sealing a subterranean zone to prevent the uncontrolled flow of fluids into or from the zone consisting essentially of
- oil present in an amount in the range of from about 32% to about 62% by weight of said composition;
- a hydratable polymer present in an amount in the range of from about 3% to about 6% by weight of said composition;
- an organophillic clay present in an amount in the range of from about 0.3% to about 0.6% by weight of said composition;
- and
- a water swellable clay present in an amount in the range of from about 34% to about 62% by weight of said composition.
A composition for sealing a subterranean zone to prevent the uncontrolled flow of fluids into or from the zone consisting essentially of:
- diesel oil present in an amount in the range of from about 32% to about 62% by weight of said composition;
- hydroxyethylcellulose present in an amount in the range of from about 3% to about 6% by weight of said composition;
- an alkyl quaternary ammonium bentonite clay present in an amount in the range of from about 0.3% to about 0.6% by weight of said composition;
- and
- water-swellable bentonite present in an amount in the range of from about 34% to about 62% by weight of said composition.
A method of sealing a subterranean zone to prevent the uncontrolled flow of fluids into or from the zone comprising the steps of:
- preparing a subterranean zone sealing composition consisting essentially of oil, a hydratable polymer, an organophillic clay and a water-swellable clay;
- and
- introducing said sealing composition into said zone.
Dependencies are inferred from the claim text.