Clay stabilization with control of migration of clays and fines

Patent metadata

Field	Value
Publication number	US-2016347983-A1
Application number	US-201415116726-A
Country	US
Kind code	A1
Filing date	Apr 23, 2014
Priority date	Apr 23, 2014
Publication date	Dec 1, 2016
Grant date	—

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

1 - 67 . (canceled)

68 . A method of treating a subterranean formation, the method comprising:
obtaining or providing a composition comprising a compound comprising at least one silylating group and at least one ammonium group; placing the composition in a subterranean formation.

69 . The method of claim 68 , wherein the ammonium group comprises an ion-exchange clay-stabilizing group.

70 . The method of claim 68 , 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.

71 . The method of claim 68 , wherein the silylating group comprises a tether group for a subterranean material comprising silylizable groups on a surface thereof.

72 . The method of claim 68 , wherein the silylating group comprises a hydroxy-reactive organosilicone group.

73 . The method of claim 68 , 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.

74 . The method of claim 68 , 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, and 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.

75 . The method of claim 74 , wherein the compound comprising at least one silylating group and at least one ammonium group comprises the structure:

76 . The method of claim 74 , 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.

77 . The method of claim 74 , 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.

78 . The method of claim 68 , 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 consisting of —H, substituted or unsubstituted (C 1 -C 10 )alkyl, and substituted or unsubstituted (C 6 -C 20 )aryl.

79 . The method of claim 74 , 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.

80 . The method of claim 74 , 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+y2 is greater than 0, and y3+y4 is greater than 0.

81 . The method of claim 80 , 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;
at each occurrence, L 2 is independently selected from (C 1 -C 5 )alkylene.

82 . The method of claim 80 , 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;
at each occurrence, L 2 is independently selected from (C 1 -C 5 )alkylene.

83 . The method of claim 80 , wherein the compound comprising at least one silylat

Assignees

• Halliburton Energy Services Inc

Inventors

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

Classifications

• C09K8/42

  Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells (compositions for plastering C09K8/50) · CPC title

• E21B21/01

  Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes · CPC title

• C09K2208/12

  Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating · CPC title

• C09K8/74

  combined with additives added for specific purposes · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title