Clay stabilizers

Patent metadata

Field	Value
Publication number	US-10988657-B2
Application number	US-201415300233-A
Country	US
Kind code	B2
Filing date	Jul 1, 2014
Priority date	Jul 1, 2014
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

Various embodiments disclosed relate to clay stabilizers. In various embodiments, the present invention provides a method of treating a subterranean formation, including obtaining or providing a composition including a clay stabilizer having the structure Y—R 1 —(O—R 2 ) x —Y. The variable R 1 can be a substituted or unsubstituted (C 1 -C 20 )hydrocarbylene. At each occurrence, R 2 can independently be a substituted or unsubstituted (C 1 -C 20 )hydrocarbylene. At each occurrence, Y can be independently selected from a substituted or unsubstituted amino group, a substituted or unsubstituted ammonium group, a nitro group, a substituted or unsubstituted amine oxide group, and a substituted or unsubstituted (C 1 -C 20 )hydrocarbyloxy group, wherein at least one terminal group Y is a substituted amino group, a substituted or unsubstituted ammonium group, a substituted or unsubstituted amine oxide group, or a nitro group. The variable x can be an integer between 1 and 200,000. The method also includes placing the composition in a subterranean formation.

First claim

What is claimed is:

1. A method of treating a subterranean formation, the method comprising:
placing in the subterranean formation a composition comprising a clay stabilizer having the structure:

wherein
R 1 is an unsubstituted C 2 hydrocarbylene,
R 2 at each occurrence is independently an unsubstituted C 2 hydrocarbylene,
the left terminal group Y is a substituted amino group, wherein the substituent is an organic group, and the right terminal group Y is an unsubstituted (C 1 -C 20 ) hydrocarbyloxy group,
x is an integer from 1 to 200,000,
wherein the organic group contains a heteroatom.

2. The method of claim 1 , wherein the composition comprises a carrier fluid.

3. The method of claim 2 , wherein the clay stabilizer is dispersed or dissolved in the carrier fluid.

4. The method of claim 1 , wherein about 0.0001 wt % to about 99.999 wt % of the composition is the clay stabilizer.

5. The method of claim 1 , wherein the clay stabilizer also functions as a shale stabilizer.

6. The method of claim 1 , wherein R 1 is a (C 1 -C 6 )alkylene.

7. The method of claim 1 , wherein R 2 is a (C 1 -C 6 )alkylene.

8. The method of claim 1 , wherein the clay stabilizer has a molecular weight of about 50 to about 1,000,000.

9. The method of claim 1 , wherein the composition comprises one or more second clay stabilizers.

10. The method of claim 1 , wherein the composition further comprises a viscosifier.

11. The method of claim 1 , wherein the composition further comprises a crosslinker.

12. A system for performing the method of claim 1 , the system comprising:
a tubular disposed in the subterranean formation; and
a pump configured to pump the composition in the subterranean formation through the tubular.

Assignees

• Halliburton Energy Services Inc

Inventors

• Shumway William Walter
• Mcdaniel Cato Russell

Classifications

• C09K8/467

  containing additives for specific purposes · CPC title

• C09K2208/08

  Fiber-containing well treatment fluids · CPC title

• C09K8/74

  combined with additives added for specific purposes · CPC title

• C09K2208/32

  Anticorrosion additives · CPC title

• C09K8/50

  Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls (compositions for consolidating loose sand or the like around wells C09K8/56) · CPC title