Proppant Comprising Swellable Coating Thereon for Treatment of Subterranean Formations

Patent metadata

Field	Value
Publication number	US-2018201828-A1
Application number	US-201515744000-A
Country	US
Kind code	A1
Filing date	Sep 14, 2015
Priority date	Sep 14, 2015
Publication date	Jul 19, 2018
Grant date	—

Abstract

Various embodiments disclosed relate to proppant including a swellable coating thereon for treatment of subterranean formations. In various embodiments, the present invention provides a method of treating a subterranean formation. The method includes placing in the subterranean formation a proppant including a coating thereon. The coating is swellable with aqueous medium in response to a trigger including acidic pH, CO 2 , H 2 S, or a combination thereof.

First claim

1 .- 93 . (canceled)

94 . A method of treating a subterranean formation, comprising:
placing a coated proppant comprising a coating into the subterranean formation, wherein the coating is swellable in contact with an aqueous medium, and wherein the coating is substantially unswollen when placed into the subterranean formation; and triggering swelling of the coating on the coated proppant within the subterranean formation by exposing the coating to the aqueous medium comprising an acidic pH, CO 2 , H 2 S, or any combination thereof.

95 . The method of claim 94 , wherein after the triggering and the swelling of the coating, the coated proppant has a greater buoyancy than the coated proppant having the coating that is substantially unswollen.

96 . The method of claim 94 , wherein the coating comprises a polymer that comprises a repeating group having the structure:

wherein:
A 1 is selected from the group consisting of —O— and —NH—,
R 1 , R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of —H, halide, and substituted or unsubstituted (C 1 -C 50 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n1 —, and —(CH 2 —CH 2 —CH 2 —O) n1 —, wherein n1 is 1 to about 10,000, and
L 1 is substituted or unsubstituted (C 1 -C 50 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n2 —, and —(CH 2 —CH 2 —CH 2 —O) n2 —, wherein n2 is 1 to about 10,000.

97 . The method of claim 96 , wherein A 1 is —O—, wherein R 1 , R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of —H and (C 1 -C 10 )alkyl, and wherein L 1 is (C 1 -C 10 )alkylene.

98 . The method of claim 96 , wherein repeating group A has the structure:

99 . The method of claim 96 , wherein the polymer further comprises a repeating group having the structure:

wherein:
R 6 , R 7 , R 8 are each independently selected from the group consisting of —H, halide, and substituted or unsubstituted (C 1 -C 50 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n3 —, and —(CH 2 —CH 2 —CH 2 —O) n3 —, wherein n3 is 1 to about 10,000,
L 2 is selected from the group consisting of a bond and substituted or unsubstituted (C 1 -C 50 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n4 —, and —(CH 2 —CH 2 —CH 2 —O) n4 —, wherein n4 is 1 to about 10,000, and
R 9 is selected from the group consisting of substituted (C 1 -C 20 )aryl and substituted or unsubstituted (C 1 -C 20 )heteroaryl.

100 . The method of claim 99 , wherein R 6 , R 7 , R 8 are each independently selected from the group consisting of —H and (C 1 -C 10 )alkyl, wherein L 2 is selected from the group consisting of a bond and (C 1 -C 10 )alkylene, and wherein R 9 is phenyl or aryl.

101 . The method of claim 99 , wherein repeating group B has the structure:

102 . The method of claim 98 , wherein the polymer further comprises repeating group C comprising a crosslinker, and wherein repeating group C is formed from a molecule comprising two or more vinyl groups, wherein each vinyl group is independently substituted or unsubstituted.

103 . The method of claim 98 , wherein the polymer further comprises repeating group C comprising a crosslinker, and wherein repeating group C has the structure:

wherein:
R 10 , R 1 , and R 12 are each independently selected from the group consisting of —H, halide, and substituted or unsubstituted (C 1 -C 50 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n5 —, and —(CH 2 —CH 2 —CH 2 —O) n5 —, wherein n5 is 1 to about 10,000, and
CLK is at least one of an intermolecular and an intramolecular crosslink comprising a substituted or unsubstituted (C 1 -C 50 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n6 —, and —(CH 2 —CH 2 —CH 2 —O) n6 —, wherein n6 is 1 to about 10,000.

104 . The method of claim 103 , wherein:
R 10 , R 1 , and R 12 are each independently selected from the group consisting of —H and (C 1 -C 10 )alkyl; and CLK is —C(O)-A 2 -L 3 -A 2 -C(O)—, wherein:
at each occurrence, A 2 is independently selected from the group consisting of —O— and —NH—, and
L 3 is a substituted or unsubstituted (C 1 -C 48 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n7 —, and —(CH 2 —CH 2 —CH 2 —O) n7 —, wherein n7 is 1 to about 10,000.

105 . The method of claim 104 , wherein repeating group C has the structure:

wherein:
repeating group C′ is a repeating group C in the same polymer molecule or in a different molecule of the polymer, and
at each occurrence, R 10 , R 11 , and R 12 are independently selected.

106 . The method of claim 98 , wherein repeating group C has the structure:

wherein:
repeating group C′ is a repeating group C in the same polymer molecule or in a different molecule of the polymer.

107 . The method of claim 98 , wherein the polymer comprises repeating groups having the structure:

wherein:
repeating groups A, B, and C have a random or block copolymer arrangement and are in the order shown or any other order,
at each occurrence, repeating groups A, B, and C independently occur in the direction shown or in the opposite direction,
A 1 is selected from the group consisting of —O— and —NH—,
R 1 , R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of —H, halide, and substituted or unsubstituted (C 1 -C 50 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n1 —, and —(CH 2 —CH 2 —CH 2 —O) n1 —, wherein n1 is 1 to about 10,000,
L 1 is substituted or unsubstituted (C 1 -C 50 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n2 —, and —(CH 2 —CH 2 —CH 2 —O) n2 —, wherein n2 is 1 to about 10,000,
R 6 , R 7 , R 8 are each independently selected from the group consisting of —H, halide, and substituted or unsubstituted (C 1 -C 50 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, substituted or unsubstituted —NH—, —(CH 2 —CH 2 —O) n3 —, and —(CH 2 —CH 2 —CH 2 —O) n3 —, wherein n3 is 1 to about 10,000,
L 2 is selected from the group consisting of a bond and subst

Assignees

• Halliburton Energy Services Inc

Inventors

• Pravesh Jag
• Salla Rajender
• Nguyen Philip
• Mishra Vaishali
• Kadam Sunita
• Patil Rahul

Classifications

• C09K8/805 Primary

  Coated proppants · CPC title

• C09K8/66

  Compositions based on water or polar solvents (C09K8/64 takes precedence) · CPC title

• E21B43/267

  reinforcing fractures by propping · CPC title

• C09K8/64

  Oil-based compositions · CPC title

• C09K8/84

  Compositions based on water or polar solvents (C09K8/66, C09K8/82 take precedence) · CPC title