Treating a subterranean formation with a composition having multiple curing stages

Patent metadata

Field	Value
Publication number	US-2016201443-A1
Application number	US-201314914856-A
Country	US
Kind code	A1
Filing date	Dec 11, 2013
Priority date	Dec 11, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

The present invention relates to compositions for treatment of subterranean formations including a curable resin that is amine-curable and a curing agent having a structure including at least one primary amine and at least one secondary amine, and methods of using the same. In various embodiments, the present invention provides a method of treating a subterranean formation. The method can include obtaining or providing a composition including a curable resin that is amine-curable and a curing agent having a structure including at least one primary amine and at least one secondary amine. The method can include placing the composition in a subterranean formation downhole.

First claim

1 - 87 . (canceled)

88 . A method of treating a subterranean formation, the method comprising:
placing in the subterranean formation a composition comprising
a curable resin, wherein the resin is amine-curable; and
a curing agent having a structure comprising at least one primary amine and at least one secondary amine.

89 . The method of claim 88 , wherein the composition further comprises at least one of proppant and gravel.

90 . The method of claim 88 , comprising fracturing the subterranean formation to form at least one fracture in the subterranean formation.

91 . The method of claim 88 , further comprising at least partially curing the composition.

92 . The method of claim 91 , further comprising removing partially cured resin from the subterranean formation before the curing is complete.

93 . The method of claim 88 , wherein the composition has at least a first and a second curing stage, a consolidation strength of the first stage being less than a consolidation strength of the second stage.

94 . The method of claim 93 , wherein the first curing stage comprises curing of the curable resin with the primary amine group of the curing agent, wherein the second curing stage comprises curing of the curable resin with the secondary amine of the curing agent.

95 . The method of claim 88 , wherein the curable resin comprises at least one of an epoxy resin and an isocyanate resin.

96 . The method of claim 88 , wherein the composition further comprises at least one tackifier.

97 . The method of claim 88 , wherein the curing agent is at least one of an unsymmetrical diamine and a polyamine.

98 . The method of claim 88 , wherein the curing agent has the structure:
(NH 2 ) n -A-(NHR 1 ) m , wherein
A is selected from the group consisting of a substituted or unsubstituted (C 1 -C 30 )hydrocarbylene interrupted or terminated by 0, 1, 2, or 3 O or S atoms, and a substituted or unsubstituted (C 2 -C 5 )hydrocarbylenepoly(oxy(C 2 -C 5 )hydrocarbylene);
R 1 at each occurrence is independently selected from the group consisting of substituted or unsubstituted (C 1 -C 30 )hydrocarbyl interrupted or terminated by 0, 1, 2, or 3 O or S atoms, substituted or unsubstituted (C 2 -C 5 )hydrocarbylenepoly(oxy(C 2 -C 5 )hydrocarbylene), substituted or unsubstituted (C 1 -C 30 )heteroaryl, and —OH; and
n and m are each independently about 1 to about 1,000.

99 . The method of claim 98 , wherein the curing agent has the structure:
H 2 N-A-NHR 1 .

100 . The method of claim 98 , wherein the curing agent has the structure:

wherein
R 2 is selected from the group consisting of substituted or unsubstituted (C 1 -C 30 )hydrocarbyl interrupted or terminated by 0, 1, 2, or 3 O or S atoms, substituted or unsubstituted (C 2 -C 5 )hydrocarbylenepoly(oxy(C 2 -C 5 )hydrocarbylene), substituted or unsubstituted (C 1 -C 30 )heteroaryl, —H, halo, nitro, trihalomethyl, cyano, and —OH; and
p is about 1 to about 30.

101 . The method of claim 98 , wherein the curing agent has the structure:

wherein
R 2 is selected from the group consisting of substituted or unsubstituted (C 1 -C 30 )hydrocarbyl interrupted or terminated by 0, 1, 2, or 3 O or S atoms, substituted or unsubstituted (C 2 -C 5 )hydrocarbylenepoly(oxy(C 2 -C 5 )hydrocarbylene), substituted or unsubstituted (C 1 -C 30 )heteroaryl, —H, halo, nitro, trihalomethyl, cyano, and —OH; and
p is about 0 to about 30.

102 . The method of claim 88 , wherein the curing agent has the structure:

wherein
R 1 is selected from the group consisting of (C 1 -C 8 )alkyl, (C 5 -C 15 )aryl, (C 5 -C 15 )heteroaryl, and —OH,
R 2 is selected from the group consisting of (C 1 -C 8 )alkyl, (C 5 -C 15 )aryl, (C 5 -C 15 )heteroaryl, —H, halo, nitro, trihalomethyl, cyano, and —OH, and
p is about 1 to about 6.

103 . The method of claim 88 , wherein the composition further comprises a second curing agent comprising at least one of an amine, an aromatic amine, an aliphatic amine, a cyclo-aliphatic amine, piperidine, triethylamine, benzyldimethylamine, N,N-dimethylaminopyridine, 2-(N,N-dimethylaminomethyl)phenol, tris(dimethylaminomethyl)phenol, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, n-beta-(aminoethyl)-gamma-aminopropyl trimethoxysilane, and n-beta-(aminoethyl)-gamma-aminopropyl trimethoxysilane.

104 . The method of claim 88 , wherein the composition further comprises a carrier fluid, a silane coupling agent, a surfactant, a hydrolyzable ester, or a combination thereof.

105 . A system for performing the method of claim 88 , the system comprising:
a tubular disposed in the subterranean formation, a pump configured to pump the composition through the tubular in the subterranean formation.

106 . A method of treating a subterranean formation, the method comprising:
placing a composition in the subterranean formation, the subterranean formation comprising a fracture, the composition comprising
a proppant or gravel coated with a mixture comprising
a curable resin, wherein the resin is amine-curable;
a curing agent comprising at least one primary amine and at least one secondary amine;
a surfactant; and
a carrier fluid; and

curing the composition.

107 . A composition for treatment of a subterranean formation, the composition comprising:
a curable resin, wherein the resin is amine-curable; a curing agent having a structure comprising at least one primary amine and at least one secondary amine; and a proppant or gravel.

Assignees

• Halliburton Energy Services Inc

Inventors

• Nguyen Philip D
• Vo Loan K
• Sparks Bradley J

Classifications

• C09K8/035 Primary

  Organic additives · CPC title

• C09K8/62

  Compositions for forming crevices or fractures · CPC title

• E21B43/267 Primary

  reinforcing fractures by propping · CPC title

• C09K8/805

  Coated proppants · CPC title