Core-shell particles for treatment of subterranean formations

Patent metadata

Field	Value
Publication number	US-2018237680-A1
Application number	US-201515753407-A
Country	US
Kind code	A1
Filing date	Sep 15, 2015
Priority date	Sep 15, 2015
Publication date	Aug 23, 2018
Grant date	—

Abstract

Various embodiments disclosed relate to core-shell particles 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 composition including a core-shell particle including a hydrophilic core and a hydrophobic shell.

First claim

What is claimed is:

1 .- 110 . (canceled)

111 . A method of treating a subterranean formation, the method comprising:
placing in the subterranean formation a composition comprising
a core-shell particle comprising
a hydrophilic core; and
a hydrophobic shell.

112 . The method of claim 111 , wherein the composition is an acidizing fluid, an enhanced oil recovery fluid, a fracturing fluid, a drilling fluid, a pill, a remedial treatment fluid, logging fluid, or a combination thereof.

113 . The method of claim 111 , wherein the method comprises acidizing, performing enhanced oil recovery, fracturing, drilling, fluid loss control, logging, or a combination thereof.

114 . The method of claim 111 , wherein the core-shell particle has a particle size of about 100 nm to about 1 mm.

115 . The method of claim 111 , wherein the shell has a thickness of about 1 nm to about 10 microns.

116 . The method of claim 111 , wherein the core comprises a payload, wherein the payload comprises an acid, a base, a catalyst, a crosslinker, a breaker, a hydrophilic polymer, or a combination thereof.

117 . The method of claim 116 , further comprising releasing the payload from the core-shell particle wherein releasing the payload from the core-shell particle comprises releasing or removing the core from at least part of the shell.

118 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit having the structure:

wherein R 1 , R 2 , R 3 , R 4 , and R 5 are each independently selected from —H, halo, and substituted or unsubstituted (C 1 -C 5 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—.

119 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit having the structure:

120 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising at least one repeating unit that has a zwitterionic structure.

121 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit having the structure:

wherein
-A- is —O— or —NH—,
R 6 , R 7 , R 8 , R 9 , R 10 are each independently chosen from —H, halo, and substituted or unsubstituted (C 1 -C 5 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—, and
L 1 and L 2 are each independently chosen from substituted or unsubstituted (C 1 -C 5 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—.

122 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit that has the structure:

123 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit that is formed from N-(2-methacryloyloxy)ethyl-N,N-dimethyl-ammonio propanesulfonate (SPE), having the structure:

124 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit that has the structure:

125 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit that is formed from N-(3-methacryloylamino)propyl-N,N-dimethyl-ammonio propanesulfonate (SPP), having the structure:

126 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit having the structure:

wherein
-A- is —O— or —NH—,
R 11 , R 12 , R 13 , R 14 , R 15 , R 16 are each independently chosen from —H, halo, and substituted or unsubstituted (C 1 -C 8 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—, and
L 3 and L 4 are each independently chosen from substituted or unsubstituted (C 1 -C 5 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—.

127 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit that has the structure:

128 . The method of any of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit that is formed from 2-(methacryloyloxy)ethylphosphatidylcholine (MPC), having the structure:

129 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit having the structure:

wherein
R 17 , R 18 , and R 19 are each independently chosen from —H, halo, and substituted or unsubstituted (C 1 -C 5 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—, and
L 5 is independently substituted or unsubstituted (C 1 -C 5 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—.

130 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit that has the structure:

131 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit that is formed from 3-(2′-vinyl-pyridinio)propanesulfonate (SPV), having the structure:

132 . The method of claim 111 , wherein the hydrophilic core comprises a polymer comprising a repeating unit having the structure:

wherein
-A- is —O— or —NH—,
R 20 , R 21 , R 22 , R 23 , R 24 , R 25 are each independently chosen from —H, halo, and substituted or unsubstituted (C 1 -C 8 )hydrocarbyl interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—, and
L 6 and L 7 are each independently chosen from substituted or unsubstituted (C 1 -C 5 )hydrocarbylene interrupted by 0, 1, 2, or 3 groups independently selected from —O—, —S—, and substituted or unsubstituted —NH—.

133 . The method of any claim 111 , wherein the hydrophilic core c

Assignees

• Halliburton Energy Services Inc

Inventors

• Hall Lee
• Deville Jay Paul
• Varnosfaderani Mohammad Vatankhah
• Sheyko Sergey

Classifications

• C09K8/92

  characterised by their form or by the form of their components, e.g. encapsulated material (C09K8/70 takes precedence) · CPC title

• E21B37/00

  Methods or apparatus for cleaning boreholes or wells (E21B21/00 takes precedence) · CPC title

• E21B21/003

  Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138) · CPC title

• C09K8/035 Primary

  Organic additives · CPC title

• C09K8/70

  characterised by their form or by the form of their components, e.g. foams · CPC title