Aqueous suspensions of silica additives

Patent metadata

Field	Value
Publication number	US-10196553-B2
Application number	US-201415035993-A
Country	US
Kind code	B2
Filing date	Mar 24, 2014
Priority date	Mar 24, 2014
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A method of treating a subterranean formation comprising: forming a treatment fluid by adding a desired volume of a liquid concentrate suspension to at least a base fluid, wherein the treatment fluid comprises the liquid concentrate suspension and the base fluid, and wherein the liquid concentrate suspension comprises: (A) water; (B) an additive; and (C) a magnesium silicate clay, wherein the clay increases the viscosity of the water, wherein the liquid concentrate suspension is stable for a time period of at least 2 weeks; and introducing the treatment fluid into the subterranean formation.

First claim

What is claimed is:

1. A method of treating a subterranean formation comprising:
forming a treatment fluid by adding a desired volume of a liquid concentrate suspension to at least a base fluid, wherein the treatment fluid comprises the liquid concentrate suspension and the base fluid, and wherein the liquid concentrate suspension consists essentially of:
(A) water;
(B) an additive in a concentration of about 50% to about 80% by volume of the water; wherein if the additive comprises a hydrophobic group, the liquid concentrate suspension then additionally comprises a surfactant; and
(C) an organically functionalized magnesium silicate clay, wherein the clay increases the viscosity of the liquid concentrate suspension to a viscosity of about 500 cP to about 2000 cP, wherein the clay is in a concentration in a range of about 0.2% to about 2.5% by weight of the water,
wherein the liquid concentrate suspension is stable for a time period of at least 2 weeks; and

introducing the treatment fluid into the subterranean formation.

2. The method according to claim 1 , wherein the water is selected from the group consisting of freshwater, brackish water, and saltwater, in any combination thereof in any proportion.

3. The method according to claim 1 , wherein the additive is selected from the group consisting of silica, a mechanical property enhancer for cement compositions, a fluid loss additive, a lost-circulation material, a set accelerator for cement compositions, a light-weight additive, a heavy-weight additive, and combinations thereof in any proportion.

4. The method according to claim 1 , wherein the additive is insoluble in the water.

5. The method according to claim 1 , wherein the clay increases the viscosity of the liquid concentrate suspension to a viscosity in the range of about 500 to about 5,000 centipoise.

6. The method according to claim 1 , wherein the clay is in a concentration by weight of the water such that the viscosity of the liquid concentrate suspension is increased to a viscosity in the range of about 500 to about 5,000 centipoise.

7. The method according to claim 1 , wherein the clay is in a concentration in the range of about 0.5% to about 2.5% by weight of the water.

8. The method according to claim 1 , wherein the liquid concentrate suspension is pourable upon initial mixing and after aging for at least 2 weeks.

9. The method according to claim 1 , wherein the liquid concentrate suspension is stable for at least 1 month.

10. The method according to claim 9 , wherein the clay increases the viscosity of the water to at least a sufficient viscosity such that the liquid concentrate suspension is stable for at least 1 month.

11. The method according to claim 1 , wherein the additive is an elastomer.

12. The method according to claim 1 , wherein the surfactant is a non-ionic surfactant.

13. The method according to claim 12 , wherein the surfactant is in a concentration in the range of about 0.01% to about 1% by weight of the water.

14. The method according to claim 1 , wherein the base fluid is an aqueous liquid, a liquid hydrocarbon, or mixtures thereof.

15. The method according to claim 1 , wherein the treatment fluid is a cement composition, a drilling fluid, a spacer fluid, a workover fluid, or a stimulation fluid.

16. The method according to claim 1 , wherein the treatment fluid is introduced into the subterranean formation using a pump.

17. A liquid concentrate suspension for use in a subterranean formation consisting essentially of:
water;
an additive in a concentration of about 50% to about 80% by volume of the water;
wherein if the additive comprises a hydrophobic group, the liquid concentrate suspension then additionally comprises a surfactant; and
an organically functionalized magnesium silicate clay, wherein the clay increases the viscosity of the liquid concentrate suspension to at least a viscosity of 500 cP, wherein the clay is in a concentration in a range of about 0.2% to about 2.5% by weight of the water, wherein the liquid concentrate suspension is stable for a time period of at least 2 weeks.

Assignees

• Halliburton Energy Services Inc

Inventors

• Patil Sandip P
• Patil Rahul C
• Ak Remitha

Classifications

• C09K8/487

  Fluid loss control additives; Additives for reducing or preventing circulation loss · CPC title

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B22/004

  containing dissolved additives or active agents, i.e. aqueous solutions used as gauging water (C04B22/0026 takes precedence) · CPC title

• C09K8/145 Primary

  characterised by the composition of the clay · CPC title

• C09K8/602

  containing surfactants · CPC title