Use of a boron cross linker in an emulsion system
Methods, fluids, compositions, and suspensions are provided for treating subterranean formations. The fluids can be servicing fluids, such as drilling or fracturing fluids. The fluids may include an aqueous base fluid and a polysaccharide. The aqueous base fluid may be admixed with a crosslinker suspension. The crosslinker suspension may include an emulsion, an emulsifier, and a boron containing compound.
1. A crosslinker suspension consisting of:
an emulsion consisting of an aqueous fluid, an oil, and an additive in the aqueous fluid selected from a dissolved salt, an acid, a base, a winterizing agent, and any combination thereof, wherein the winterizing agent is selected from the group consisting of ethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, methanol, isopropanol, sodium formate, potassium formate, potassium acetate, and any combination thereof,
an emulsifier, and
a boron containing compound selected from the group consisting of ulexite, colemanite, and any combination thereof.
2. The crosslinker suspension of claim 1 , wherein the emulsion is a water-in-oil emulsion.
3. The crosslinker suspension of claim 1 , wherein the emulsion comprises from about 1% to about 6% of the emulsifier.
4. The crosslinker suspension of claim 1 , wherein the emulsion comprises from about 10% to about 50% of the boron containing compound.
5. The crosslinker suspension of claim 1 , wherein the dissolved salt is selected from the group consisting of sodium chloride, potassium chloride, calcium chloride, ammonium chloride, magnesium chloride, sodium bromide, potassium bromide, calcium bromide, and any combination thereof.
6. The crosslinker suspension of claim 1 , wherein the base is selected from the group consisting of sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, calcium hydroxide, and any combination thereof.
7. The crosslinker suspension of claim 1 , wherein the emulsifier is selected from the group consisting of polyoxyethylene fatty alcohol ethers, polyether modified polyorganosiloxane, oleic acid ethoxylates, alkylphenol ethoxylates vinyl ether, polyoxyethylene castor oil ether, pyrrolidones, amides from fatty acids, amides from ether sulfates, amides from sorbitane sesquioleate, and any combination thereof.
8. The crosslinker suspension of claim 1 , wherein the oil is selected from the group consisting of diesel oil, conventional mineral oil, refined oils, vegetable oils, synthetic highly refined paraffin, a synthetic blend of paraffin, olefin, and oxygenated solvent, and any combination thereof.
9. A method for treating a subterranean formation comprising:
providing an aqueous base fluid comprising a polysaccharide,
admixing the aqueous base fluid with a crosslinker suspension to form a well servicing fluid, wherein the crosslinker suspension consists of:
an emulsion consisting of an aqueous fluid, an oil, an additive in the aqueous fluid selected from a dissolved salt, an acid, a base, a winterizing agent, and any combination thereof, an emulsifier, and a borate containing compound selected from the group consisting of ulexite, colemanite, and any combination thereof,
wherein the winterizing agent is selected from the group consisting of ethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, methanol, isopropanol, sodium formate, potassium formate, potassium acetate, and any combination thereof, and
injecting the well servicing fluid into the subterranean formation.
10. The method of claim 9 , wherein the aqueous base fluid is selected from the group consisting of water, brine, seawater, brackish water, a salt solution, and any combination thereof.
11. The method of claim 9 , wherein the polysaccharide is a crosslinkable polymer.
12. The method of claim 11 , wherein the crosslinkable polymer is guar, hydroxypropylguar, carboxymethylhydroxypropylguar, and any combination thereof.
13. The method of claim 9 , wherein the emulsion is a water-in-oil emulsion.
14. The method of claim 9 , wherein the aqueous base fluid comprises from about 10% to about 50% of the crosslinker suspension.