Fluid composition and method for stimulation in the field of oil and gas production

1. A composition, comprising:

(a) at least one linear or branched hydrofluorocarbon compound having a boiling point, at a pressure of 1 atmosphere (101325 Pa), of between 0° C. and 65° C.; and

(b) at least one proppant.

2. The composition of claim 1 , wherein the composition has a critical temperature equal to or greater than 110° C. and equal to or lower than 200° C.

3. The composition of claim 1 , wherein the at least one linear or branched hydrofluorocarbon compound is represented by formula (1):

C n H m F p X q   (1)

wherein n, m, p and q respectively represent the number of carbon atoms, hydrogen atoms, fluorine atoms and X atoms, wherein n≥3, m≥0, p≥1, q represents 0 or 1 or 2, and X represents a halogen atom different from fluorine, and

wherein the compound of formula (1) has a Normal Boiling Point (NBP) of between 0° C. and 65° C.

4. The composition of claim 3 , wherein n is 3 or 4, 0≤m≤7, 3≤p≤9, and q represents 0 or 1.

5. The composition of claim 3 , wherein the compound represented formula (1) has a Normal Boiling Point (NBP) of between 5° C. and 60° C.

6. The composition of claim 3 , wherein the compound represented formula (1) has a Normal Boiling Point (NBP) of between 10° C. and 55° C.

7. The composition of claim 1 , wherein the at least one hydrofluorocarbon compound is selected from the group consisting of 1,1,1,3-tetrafluoropropane, 1,1,2,2,3-pentafluoropropane, 1,1,1,3,3-pentafluoropropane, 1,1,1,2,3,3-hexafluoropropane, 1,3-difluoropropane, 1 chloro-3,3,3-trifluoropropene, 1,1,3,3-tetrafluoropropane, 1,2,2,3-tetrafluoropropane, 1,1,1,2,2,4,4,4-octafluorobutane, 1,1,1,2,2,3,3,4-octafluorobutane, 1,1,1,2,2,3,3,4,4-nonafluorobutane, and mixtures thereof.

8. The composition of claim 1 , further comprising one or more additives selected from the group consisting of from biocides, corrosion inhibitors, surfactants, scale inhibitors, anti-foaming agents, rheology modifiers, and mixtures thereof.

9. The composition of claim 1 , wherein the at least one proppant is selected from the group consisting of sand, resin-coated sand, intermediate-strength proppant ceramics, high-strength proppants, plastic pellets, steel shot, glass beads, high strength glass beads, aluminum pellets, rounded-nut shells, and mixtures thereof.

10. The composition of claim 9 , wherein the at least one proppant is present in a concentration between 20 grams and 600 grams per liter of the composition.

11. The composition of claim 1 , wherein the at least one proppant is present in a concentration between 25 grams and 250 grams per liter of the composition.

12. The composition of claim 1 , wherein the composition contains no added water.

13. The composition of claim 1 , wherein the composition has a settling velocity equal to or lower than that of water over a temperature range from 20° C. to 200° C.

14. A method of preparing the composition of claim 1 , comprising:

combining the linear or branched hydrofluorocarbon and the proppant.

15. A method for fracturing a subterranean formation, comprising:

(1) injecting an effective amount of the composition of claim 1 into a subterranean formation at a pressure sufficient to open one or several fractures therein.

16. The method of claim 15 , wherein the composition is in the form of a liquid.

17. The method of claim 15 , further comprising, prior to (1), combining (a) and (b).

18. The method of claim 15 , further comprising:

(2) recycling of the composition.

19. The method of claim 15 , further comprising (2) recycling of the composition, wherein the recycling comprises:

(3) recovering, with pumping and/or with decompression, at least a portion of the composition and a portion of hydrocarbons originally present in the subterranean formation, from a hydrocarbon reservoir in the subterranean formation, to produce a recovered fluid; and

(4) separating from the recovered fluid the composition to obtain a gas or a liquid, alone or in admixture with hydrocarbons.