Method and compositions for stimulating subterranean formations
A composition for use in well stimulation operations, the composition comprising a saline fluid, the saline fluid comprising between 50,000 ppm and 70,000 ppm total dissolved solids; a polymer, the polymer operable to react with a crosslinker to increase a viscosity of the saline fluid; a zirconium-containing crosslinker, the zirconium-containing crosslinker operable to react with the polymer, and a chelating agent, the chelating agent comprises diethylenetriaminepentaacetic acid (DTPA), wherein the DTPA is present in an amount between 0.1 wt. % and 0.4 wt. %.
1 . A composition for use in well stimulation operations, the composition comprising:
a saline fluid, the saline fluid comprising between 50,000 ppm and 70,000 ppm total dissolved solids;
a polymer, the polymer operable to react with a crosslinker to increase a viscosity of the saline fluid, wherein the polymer is present in an amount between 0.5 wt % and 0.6 wt %;
a zirconium-containing crosslinker, the zirconium-containing crosslinker operable to react with the polymer, wherein the zirconium-containing crosslinker is present in an amount of 1 wt %; and
a chelating agent, the chelating agent comprises diethylenetriaminepentaacetic acid (DTPA), wherein the DTPA is present in an amount between 0.1 wt % and 0.4 wt %, wherein the composition has a viscosity in the range between 100 cP and 1000 cP.
2 . The composition of claim 1 , wherein the saline fluid can be selected from the group consisting of seawater, produced water, and combinations of the same.
3 . The composition of claim 1 , wherein the polymer comprises carboxymethyl hydroxypropyl guar (CMHPG) polymer.
4 . The composition of claim 1 , wherein the zirconium-containing crosslinker is selected from the group consisting of a zirconium crosslinker and a zirconium borate dual crosslinker.
5 . The composition of claim 4 , wherein the zirconium-containing crosslinker is the zirconium crosslinker and the viscosity is between 100 cP and 250 cP.
6 . The composition of claim 4 , wherein the zirconium-containing crosslinker is the zirconium borate dual crosslinker and the viscosity is between 850 cP and 950 cP.
7 . The composition of claim 1 , further comprising a proppant.
8 . A method of using a hydraulic fracturing fluid, the method comprising the step of:
injecting the hydraulic fracturing fluid into a formation during a well stimulation operation, wherein the hydraulic fracturing fluid comprises:
a saline fluid, the saline fluid comprising between 50,000 ppm and 70,000 ppm total dissolved solids;
a polymer, the polymer operable to react with a crosslinker to increase a viscosity of the saline fluid, wherein the polymer is present in an amount between 0.5 wt % and 0.6 wt %;
a zirconium-containing crosslinker, the zirconium-containing crosslinker operable to react with the polymer, wherein the zirconium-containing crosslinker is present in an amount of 1 wt %; and
a chelating agent, the chelating agent comprises diethylenetriaminepentaacetic acid (DTPA), wherein the DTPA is present in an amount between 0.1 wt % and 0.4 wt %, wherein the hydraulic fracturing fluid has a viscosity in the range between 100 cP and 1000 cP.
9 . The method of claim 8 , wherein the well stimulation operation is selected from the group consisting of fracturing and proppant transport.
10 . The method of claim 8 , wherein the saline fluid can be selected from the group consisting of seawater, produced water, and combinations of the same.
11 . The method of claim 8 , wherein the polymer comprises carboxymethyl hydroxypropyl guar (CMHPG) polymer.
12 . The method of claim 8 , wherein the zirconium-containing crosslinker is selected from the group consisting of a zirconium crosslinker and a zirconium borate dual crosslinker.
13 . The method of claim 8 , wherein the hydraulic fracturing fluid further comprises a proppant.