Clay stabilization with control of migration of clays and fines

Patent metadata

Field	Value
Publication number	US-10081750-B2
Application number	US-201415116726-A
Country	US
Kind code	B2
Filing date	Apr 23, 2014
Priority date	Apr 23, 2014
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

Various embodiments disclosed related to methods of treating subterranean formations as well as compositions and systems for performing the same. In various embodiments, the present invention provides a method of treating a subterranean formation that includes obtaining or providing a composition including a compound including at least one silylating group and at least one ammonium group. 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, comprising:
placing a composition comprising a compound into the subterranean formation, the compound comprising at least one silylating group and at least one ammonium group,
wherein:
the silylating group comprises a hydroxyl-reactive organosilicone group; and
the ammonium group comprises an ion-exchange clay-stabilizing group; and

hydraulically fracturing the subterranean formation with the composition to generate flow pathway in the subterranean formation.

2. The method of claim 1 , further comprising at least partially stabilizing clays against swelling via ion-exchange of the ammonium group with cations present in a clay in the subterranean formation.

3. The method of claim 1 , wherein the silylating group comprises a tether group for a subterranean material comprising silylizable groups on a surface thereof.

4. The method of claim 1 , further comprising tethering at least one of clays and fines in the subterranean formation via silylation of the clays or fines with the silylating group.

5. The method of claim 1 , wherein the compound comprising at least one silylating group and at least one ammonium group comprises the structure:

wherein:
at each occurrence, each group having degree of polymerization x, y, and z is independently in a block or random arrangement and is independently oriented as shown or in the opposite orientation;
at each occurrence, R 1 , R 3 , and R 5 are each independently selected from the group consisting of a bond, —O—, —NR 7 —, —N + (R 7 ) 2 X − —, —S—, and a substituted or unsubstituted (C 1 -C 20 )hydrocarbylene at least one of interrupted and terminated with 0, 1, 2, or 3 groups independently selected from —O—, —NR 7 —, —N + (R 7 ) 2 X − —, and —S—;
at each occurrence, R 2 is independently selected from the group consisting of —OH, substituted or unsubstituted (C 1 -C 20 )hydrocarbyl, substituted or unsubstituted (C 1 -C 20 )hydrocarbyloxy, -L 1 -SiR 2 3 , -L 2 -N + R 4 3 X − , and an inter- or intra-molecular crosslink to an Si atom;
at each occurrence, R 4 and R 6 are each independently selected from the group consisting of —H, substituted or unsubstituted (C 1 -C 20 )hydrocarbyl, -L 1 -SiR 2 3 , and -L 2 -N + R 4 3 X − ;
at each occurrence, R 7 and R 8 are each independently selected from the group consisting of —H, —OH, substituted or unsubstituted (C 1 -C 20 )hydrocarbyl, substituted or unsubstituted (C 1 -C 20 )hydrocarbyloxy, -L 1 -SiR 2 3 , and -L 2 -N + R 4 3 X − ;
at each occurrence, L 1 and L 2 are each independently selected from the group consisting of a bond, a poly(substituted or unsubstituted (C 1 -C 20 )hydrocarbyloxy), a poly(substituted or unsubstituted (C 1 -C 20 )hydrocarbylamino), and a substituted or unsubstituted (C 1 -C 20 )hydrocarbyl at least one of interrupted and terminated with 0, 1, 2, or 3 groups independently selected from —O—, —NR 7 —, —N − (R 7 ) 2 X − —, and —S—, wherein each amino group is independently substituted or unsubstituted and is independently neutral or ammonium;

X − is a counterion; and
x+y+z is greater than 0.

6. The method of claim 5 , wherein the compound comprising at least one silylating group and at least one ammonium group comprises the structure:

7. The method of claim 5 , wherein the compound comprising at least one silylating group and at least one ammonium group has the structure:

wherein at each occurrence, EG is independently selected from the group consisting of —H, -L 1 -SiR 2 3 , and -L 2 -N + R 4 3 X − , a poly(substituted or unsubstituted (C 1 -C 20 )hydrocarbyloxy), a poly(substituted or unsubstituted (C 1 -C 20 )hydrocarbylamino), and a substituted or unsubstituted (C 1 -C 20 )hydrocarbyl at least one of interrupted and terminated with 0, 1, 2, or 3 groups independently selected from —O—, —NR 7 —, —N − (R 7 ) 2 X − —, and —S—, wherein each amino group is independently substituted or unsubstituted and is independently neutral or ammonium.

8. The method of claim 5 , wherein the compound comprising at least one silylating group and at least one ammonium group has the structure:

wherein:
at each occurrence, R 5 is independently selected from the group consisting of a bond and (C 1 -C 10 )alkyl;
at each occurrence, R 6 is independently selected from the group consisting of —H, substituted or unsubstituted (C 1 -C 10 )alkyl, and substituted or unsubstituted (C 6 -C 20 )aryl;
at each occurrence, L 1 and L 2 are each independently selected from the group consisting of a bond and a (C 1 -C 10 )alkyl; and
at each occurrence, R 2 is independently selected from (C 1 -C 10 )alkoxy.

9. The method of claim 5 , wherein the compound comprising at least one silylating group and at least one ammonium group comprises the structure:

wherein the groups having degree of polymerization y1 and y2 are in a block or random arrangement, and y1+y2=y.

10. The method of claim 5 , wherein the compound comprising at least one silylating group and at least one ammonium group comprises the structure:

wherein the groups having degree of polymerization y1, y2, y3, and y4 are in a block or random arrangement, y1+y2+y3+y4=y, y1+y2is greater than 0, and y3+y4 is greater than 0.

11. The method of claim 10 , wherein the compound comprising at least one silylating group and at least one ammonium group comprises the structure:

wherein:
at each occurrence, R 2 is independently selected from (C 1 -C 5 )alkoxy;
at each occurrence, R 3a is independently selected from (C 1 -C 5 )alkylene;
at each occurrence, R 4 is independently selected from (C 1 -C 5 )alkyl;
at each occurrence, R 8 is independently selected from —H and (C 1 -C 5 )alkyl; and
at each occurrence, L 2 is independently selected from (C 1 -C 5 )alkylene.

12. The method of claim 10 , wherein the compound comprising at least one silylating group and at least one ammonium group comprises the structure:

wherein:
at each occurrence, R 2 is independently selected from (C 1 -C 5 )alkoxy;
at each occurrence, R 4 is independently selected from (C 1 -C 5 )alkyl; and
at each occurrence, L 2 is independently selected from (C 1 -C 5 )alkylene.

13. The method of claim 10 , wherein the compound comprising at least one silylating group and at least one ammonium group has the structure:

14. The method of claim 1 , wherein the compound comprising at least one silylating group and at least one ammonium group has the structure:

wherein at each occurrence, R 6 is independently selected from the group consist

Assignees

• Halliburton Energy Services Inc

Inventors

• Shroff Rama Mallikarjuna
• Songire Sumit Ramesh
• Salgaonkar Lalit Pandurang

Classifications

• C09K8/62

  Compositions for forming crevices or fractures · CPC title

• E21B33/138

  Plastering the borehole wall; Injecting into the formation · CPC title

• C09K8/74

  combined with additives added for specific purposes · CPC title

• C09K8/035 Primary

  Organic additives · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title