Enhanced scale inhibitor squeeze treatment using a chemical additive
Compositions and methods for the use in scale inhibitor squeeze treatments are provided. In some embodiments the present disclosure provides a method including introducing a pre-flush fluid into at least a portion of a subterranean formation, the pre-flush fluid including a choline chloride chemical additive; and introducing a treatment fluid including a scale inhibitor into the portion of the subterranean formation after at least a portion of the pre-flush fluid has been introduced into the portion of the subterranean formation.
1. A method comprising:
introducing a pre-flush fluid into at least a portion of a subterranean formation, the pre-flush fluid comprising a chemical additive having the following structural formula:
wherein the chemical additive is present in the pre-flush fluid in an amount of from about 2% to about 3% by volume of the fluid, and wherein the chemical additive changes the rock wettability towards more water wet for enhanced scale inhibitor retention; and
introducing a treatment fluid comprising a scale inhibitor into the portion of the subterranean formation after at least a portion of the pre-flush fluid has been introduced into the portion of the subterranean formation.
2. The method of claim 1 further comprising allowing at least a portion of the scale inhibitor to adsorb onto a rock surface in at least a portion of the subterranean formation.
3. The method of claim 1 further comprising introducing an after-flush fluid into the portion of the subterranean formation after at least a portion of the scale inhibitor has been introduced into the portion of the subterranean formation.
4. The method of claim 1 further comprising:
shutting in the well bore for a predetermined period of time; and
allowing one or more produced fluids in the subterranean formation to flow from the formation and through the well bore after the predetermined period of time has ended.
5. The method of claim 1 wherein the scale inhibitor comprises a phosphonic acid selected from the group consisting of: amino trimethylene phosphonic acid (ATMP), 1-hydroxyethane 1,1-diphosphonic acid (HEDP), amino tris(methylenephosphonic acid) (ATMP), ethylenediamine tetra(methylene phosphonic acid) (EDTMP), tetramethylenediamine tetra(methylene phosphonic acid) (TDTMP), hexamethylenediamine tetra(methylene phosphonic acid) (HDTMP), ethylene diamine tetra (methylene phosphonic acid) (EDTMPA), diethylenetriamine penta(methylene phosphonic acid) (DTPMP), bis(hexamethylene triamine penta (methylene phosphonic acid)) (BHMPTPMP), any derivative thereof, and any combination thereof.
6. The method of claim 1 further comprising allowing the chemical additive to increase a wettability of at least a portion of a rock surface in the portion of the subterranean formation.
7. The method of claim 1 wherein the pre-flush fluid further comprises a scale inhibitor at a concentration smaller than the amount of the scale inhibitor in the treatment fluid.
8. A method of claim 1 wherein the scale inhibitor is present in the treatment fluid in an amount of less than about 10% by volume of the fluid.
9. The method of claim 1 wherein the pH in the portion of the subterranean formation is less than about 8.
10. The method comprising:
introducing a pre-flush fluid into at least a portion of a subterranean formation, the pre-flush fluid comprising a chemical additive having the following structural formula:
wherein the chemical additive is present in the pre-flush fluid in an amount of from about 2% to about 3% by volume of the fluid, and wherein the chemical additive changes the rock wettability towards more water wet for enhanced scale inhibitor retention;
introducing a treatment fluid comprising a scale inhibitor into the portion of the subterranean formation after at least a portion of the pre-flush fluid has been introduced into the portion of the subterranean formation; and
introducing an after-flush fluid into the portion of the subterranean formation after at least a portion of the scale inhibitor has been introduced into the portion of the subterranean formation, the after-flush fluid comprising the chemical additive.
11. The method of claim 10 further comprising allowing at least a portion of the scale inhibitor to adsorb onto a rock surface in at least a portion of the subterranean formation.
12. The method of claim 10 further comprising:
shutting in the well bore for a predetermined period of time; and
allowing one or more produced fluids in the subterranean formation to flow from the formation and through the well bore after the predetermined period of time has ended.
13. The method of claim 10 wherein the scale inhibitor comprises a phosphonic acid selected from the group consisting of: amino trimethylene phosphonic acid (ATMP), 1-hydroxyethane 1,1-diphosphonic acid (HEDP), amino tris(methylenephosphonic acid) (ATMP), ethylenediamine tetra(methylene phosphonic acid) (EDTMP), tetramethylenediamine tetra(methylene phosphonic acid) (TDTMP), hexamethylenediamine tetra(methylene phosphonic acid) (HDTMP), ethylene diamine tetra (methylene phosphonic acid) (EDTMPA), diethylenetriamine penta(methylene phosphonic acid) (DTPMP), bis(hexamethylene triamine penta (methylene phosphonic acid)) (BHMPTPMP), any derivative thereof, and any combination thereof.
14. The method of claim 10 , wherein the chemical additive is present in the after-flush fluid in an amount of from about 0.5% to about 1.5% by volume of the fluid.
15. The method of claim 10 wherein the pH in the portion of the subterranean formation is less than about 8.
16. The method comprising:
introducing a pre-flush fluid into at least a portion of a subterranean formation, the pre-flush fluid comprising a chemical additive having the following structural formula:
wherein the chemical additive is present in the pre-flush fluid in an amount of from about 2% to about 3% by volume of the fluid, and wherein the chemical additive changes the rock wettability towards more water wet for enhanced scale inhibitor retention;
introducing a treatment fluid comprising a scale inhibitor into the portion of the subterranean formation after at least a portion of the pre-flush fluid has been introduced into the portion of the subterranean formation; and
introducing an after-flush fluid into the portion of the subterranean formation after at least a portion of the scale inhibitor has been introduced into the portion of the subterranean formation.
17. The method of claim 16 further comprising allowing at least a portion of the scale inhibitor to adsorb onto a rock surface in at least a portion of the subterranean formation.
18. The method of claim 16 further comprising:
shutting in the well bore for a predetermined period of time; and
allowing one or more produced fluids in the subterranean formation to flow from the formation and through the well bore after the predetermined period of time has ended.