Methods of treating subterranean formation using borate cross-linking compositions
AssigneeHalliburton Energy Services, Inc.
InventorsMichael A. McCabe, Phillip C. Harris, Billy Slabaugh, Ronald J. Powell, John M. Terracina, Joseph G. Yaritz, Chris E. Shuchart
Life of this patent
Estimating the term…
Abstract
The present invention provides improved methods of treating subterranean formations using borate cross-linking compositions and borate cross-linked well treating fluids. The borate cross-linking compositions are basically comprised of a low viscosity hydrocarbon liquid, an organophillic clay, a slightly water soluble borate, a buffer and a dispersing agent.
Claims23
A method of treating a subterranean zone penetrated by a well bore comprising the steps of:
- preparing a high viscosity treating fluid comprised of water, a hydrated galactomannan gelling agent and a borate cross-linking composition for buffering said treating fluid and cross-linking said hydrated galactomannan gelling agent, said borate cross-linking composition being comprised of a low viscosity hydrocarbon liquid, an organophillic clay, a slightly water soluble borate, a buffer and a dispersing agent;
- and
- pumping said treating fluid into said zone.
A liquid borate composition for cross-linking aqueous galactomannan gelled well treating fluids comprising a low viscosity hydrocarbon liquid, an organophillic clay, a slightly water soluble borate, a buffer and a dispersing agent.
A liquid borate composition for cross-linking aqueous galactomannan gelled well treating fluids comprising:
- diesel oil present in said composition in an amount of about 47% by weight thereof;
- a quaternary ammonium montmorillonite organophillic clay present in said composition in an amount in the range of from about 1.5% to about 2% by weight thereof;
- a slightly water soluble borate comprised of ulexite present in said composition in an amount of about 40% by weight thereof;
- a buffer comprised of sodium carbonate present in said composition in an amount of about 10% by weight thereof;
- and
- a dispersing agent comprised of calcium dodecylbenzene sulfonate present in said composition in an amount of about 1% by weight thereof.
A stable, borate cross-linked gelled aqueous well treating fluid comprising:
- water;
- hydrated guar present in an amount of about 0.3% by weight of said water;
- and
- a borate cross-linking composition for buffering said treating fluid and cross-linking said hydrated guar comprised of a low viscosity hydrocarbon liquid, an organophillic clay, a slightly water soluble borate, a buffer and a dispersing agent, said borate composition being present in said treating fluid in an amount of about 0.3% by weight of said water.
Dependencies are inferred from the claim text.