Friction reduction fluids
The invention provides an oilfield suspending friction reducer treatment composition fluid comprising from about 0.001 weight percent to about 0.5 weight percent of a drag reducing surfactant; at least one drag reducing enhancer selected from the group consisting of polymeric drag reduction enhancers, monomeric drag reduction enhancers, and mixtures thereof.
1. An oilfield fracturing treatment method for reducing friction comprising the steps of:
providing a suspending friction reducer fluid comprising:
from about 0.001 weight percent to about 0.5 weight percent of a drag reducing surfactant comprising at least one surfactant selected from the group consisting of cationic surfactants, protonated amine surfactants, zwitterionic surfactants, anionic surfactants, amphoteric surfactants and mixtures thereof,
at least one drag reducing enhancer selected from the group consisting of polymeric drag reduction enhancer, monomeric drag reduction enhancers, and mixtures thereof, and
injecting said suspending friction reducer fluid into a wellbore as a hydraulic fracturing treatment fluid,
initiating and propagating a fracture in the formation during a PAD stage of the hydraulic fracturing treatment, and
allowing said fluid to enter a subterranean formation penetrated by the wellbore, and achieve a percent drag reduction of at least 20%,
wherein the total amount of the drag reduction enhancer is no more than about 0.2 weight percent.
2. The method of claim 1 wherein said fluid achieves a percent drag reduction of at least about 40%.
3. The method of claim 1 wherein the active drag reducing surfactant is present in the suspending friction reducer fluid at a concentration of from about 0.001 weight percent to about 0.2 weight %.
4. The method of claim 1 wherein the polymeric drag reduction enhancer is selected from the group consisting of polycondensation products of sodium naphthalene sulfonate, copolymers formed from formaldehyde condensation of naphthalene sulfonate with phenol, alkylated phenols, bisphenol F, and bisphenol A, copolymers formed by melamine condensation of naphthalene sulfonate with phenol, alkylated phenols, bisphenol F, bisphenol A, lignosulfonates, vinyl benzene sulfonate, and AMPS copolymers.
5. The method of claim 1 wherein the monomeric drag reduction enhancer comprises a monomeric or oligomeric organic ion containing at least one aromatic ring.
6. The method of claim 1 wherein the drag reducing surfactant comprises a cationic surfactant.
7. The method of claim 6 wherein said drag reducing surfactant comprises a mixture of at least one cationic surfactant and at least one anionic surfactant.
8. The method of claim 1 wherein the monomeric drag reduction enhancer comprises urea.
9. The method of claim 1 wherein the polymeric drag reduction enhancer comprises polynaphthalene sulfonate, and the monomeric drag reduction enhancer comprises salicylate.
10. The method of claim 1 wherein the drag reducing surfactant is selected from the group consisting of cetyl trimethyl ammonium chloride and tallow trimethyl ammonium chloride, the polymeric drag reduction enhancer comprises polynaphthalene sulfonate, and the monomeric drag reduction enhancer comprises salicylate.
11. The method of claim 1 wherein the suspending friction reducer fluid further comprises an additive selected from an acid, a scale inhibitor, a co-surfactant, a co-solvent, or both.
12. The method according to claim 1 further comprising the step of injecting said suspending friction reducer fluid in proppant laden stages to move proppant into at least one fracture in the formation.
13. The method according to claim 1 wherein the suspending friction reducer fluid is injected into said wellbore in conjunction with fibers and said fluid and fiber flow into a high permeability area and divert subsequent treatment fluids from high permeability zones in a formation to lower permeability zones.
14. An oilfield fracturing treatment method for reducing friction comprising the steps of:
providing a suspending friction reducer fluid comprising:
from about 0.001 weight percent to about 0.5 weight percent of a drag reducing surfactant comprising at least one surfactant selected from the group consisting of cationic surfactants, protonated amine surfactants, zwitterionic surfactants, anionic surfactants, amphoteric surfactants and mixtures thereof, and
at least one drag reducing enhancer selected from the group consisting of polymeric drag reduction enhancer, monomeric drag reduction enhancers, and mixtures thereof, and
injecting said suspending friction reducer fluid in conjunction with fibers into a wellbore as a hydraulic fracturing treatment fluid,
initiating and propagating a fracture in the formation during a PAD stage of the hydraulic fracturing treatment,
allowing said fluid and fibers to enter a subterranean formation penetrated by the wellbore, and achieve a percent drag reduction of at least 20%, and
allowing said fluid and fibers to flow into a high permeability area and divert subsequent treatment fluids from high permeability zones in a formation to lower permeability zones,
wherein the total amount of the drag reduction enhancer is no more than about 0.2 weight percent.
15. The method of claim 14 wherein said fluid achieves a percent drag reduction of at least about 40%.
16. The method of claim 14 wherein the active drag reducing surfactant is present in the suspending friction reducer fluid at a concentration of from about 0.001 weight percent to about 0.2 weight %.
17. The method of claim 14 wherein the polymeric drag reduction enhancer is selected from the group consisting of polycondensation products of sodium naphthalene sulfonate, copolymers formed from formaldehyde condensation of naphthalene sulfonate with phenol, alkylated phenols, bisphenol F, and bisphenol A, copolymers formed by melamine condensation of naphthalene sulfonate with phenol, alkylated phenols, bisphenol F, bisphenol A, lignosulfonates, vinyl benzene sulfonate, and AMPS copolymers.
18. The method of claim 14 wherein the monomeric drag reduction enhancer comprises a monomeric or oligomeric organic ion containing at least one aromatic ring.
19. The method of claim 14 wherein the drag reducing surfactant comprises a cationic surfactant.
20. The method of claim 19 wherein said drag reducing surfactant comprises a mixture of at least one cationic surfactant and at least one anionic surfactant.
21. The method of claim 20 wherein the monomeric drag reduction enhancer comprises urea.
22. The method of claim 20 wherein the polymeric drag reduction enhancer comprises polynaphthalene sulfonate, and the monomeric drag reduction enhancer comprises salicylate.
23. The method of claim 20 wherein the drag reducing surfactant is selected from the group consisting of cetyl trimethyl ammonium chloride and tallow trimethyl ammonium chloride, the polymeric drag reduction enhancer comprises polynaphthalene sulfonate, and the monomeric drag reduction enhancer comprises salicylate.
24. The method of claim 20 wherein the suspending friction reducer fluid further comprises an additive selected from an acid, a scale inhibitor, a co-surfactant, a co-solvent, or both.
25. The method of claim 20 , wherein said oilfield treatment method is selected from a method of hydraulic fracturing and a method of gravel packing.
26. The method according to claim 25 further comprising the step of injecting said suspending friction reducer fluid in proppant laden stages to move proppant into at least one fracture in the formation.
27. An oilfield fracturing treatment method for reducing friction comprising the steps of:
injecting into a wellbore a hydraulic fracturing treatment fluid to initiate and propagate a fracture in the formation;
providing a proppant and a suspending friction reducer fluid, the suspending friction reducer fluid comprising;
from about 0.001 weight percent to about 0.5 weight percent of a drag reducing surfactant comprising at least one surfactant selected from the group consisting of cationic surfactants, protonated amine surfactants, zwitterionic surfactants, anionic surfactants, amphoteric surfactants and mixtures thereof, and
at least one drag reducing enhancer selected from the group consisting of polymeric drag reduction enhancer, monomeric drag reduction enhancers, and mixtures thereof, and injecting said suspending friction reducer fluid with the proppant into the wellbore, transporting the proppant into at least one fracture in the formation, and
wherein the fluid enters a subterranean formation penetrated by the wellbore, and achieves a percent drag reduction of at least 20%,
wherein the total amount of the drag reduction enhancer is no more than about 0.2 weight percent.
28. The method of claim 27 wherein said fluid achieves a percent drag reduction of at least about 40%.
29. The method of claim 27 wherein the active drag reducing surfactant is present in the suspending friction reducer fluid at a concentration of from about 0.001 weight percent to about 0.2 weight %.
30. The method of claim 27 wherein the polymeric drag reduction enhancer is selected from the group consisting of polycondensation products of sodium naphthalene sulfonate, copolymers formed from formaldehyde condensation of naphthalene sulfonate with phenol, alkylated phenols, bisphenol F, and bisphenol A, copolymers formed by melamine condensation of naphthalene sulfonate with phenol, alkylated phenols, bisphenol F, bisphenol A, lignosulfonates, vinyl benzene sulfonate, and AMPS copolymers.
31. The method of claim 27 wherein the monomeric drag reduction enhancer comprises urea.
32. The method of claim 27 wherein the suspending friction reducer fluid further comprises an additive selected from an acid, a scale inhibitor, a co-surfactant, a co-solvent, or both.
33. The method of claim 27 wherein the suspending friction reducer fluid is injected into said wellbore in conjunction with fibers and said fluid and fiber flow into a high permeability area and divert subsequent treatment fluids from high permeability zones in a formation to lower permeability zones.
34. The method of claim 1 , wherein the suspending friction reducer fluid further comprises a conventional friction reducer (CFR) polymeric drag reducing agent.
35. The method of claim 34 , wherein the CFR polymeric drag reducing agent is selected from the group consisting of guar, a guar derivative, polyethyleneoxide, polyacrylamide, polyAMPS and a polyAMPS derivative.