56.1168
[0010]
CLAIMS
We Claim:
1.
A method of treating a subterranean formation with a fluid, comprising:
forming a fluid comprising a particulate and an organosilane with the chemical
formula RnSiX4-n, wherein n is equal to 1, 2, or 3, R is an organic functional group,
and X is a halogen, alkoxy, or acetoxy group;
introducing the fluid into a subterranean formation with exposed surfaces; and
modifying the wettability of a surface of the particulate or the subterranean
formation or both.
2.
The method of claim 1, wherein the permeability to aqueous fluid through a
cross section of a portion of an agglomeration of the particulate is at least about 1
percent higher than if no organosilane is present.
3.
The method of claim 1, wherein the permeability to aqueous fluid through a
cross section of a portion of an agglomeration of the particulate is about 1 percent to
about 50 percent higher than if no organosilane is present.
4.
The method of claim 1, wherein the conductivity to aqueous fluid through a
cross section of a portion of an agglomeration of the particulate is about 1 percent to
about 50 percent higher than if no organosilane is present.
5.
The method of claim 1, wherein a surface of the particulate or formation or
both is more hydrophobic than if no organosilane were present.
6.
The method of claim 1, wherein a surface of the particulate or formation or
both is more or comparably hydrophilic than if no organosilane were present.
7.
The method of claim 1, wherein the particulate is proppant, fiber, gravel,
colloidal silica, siliceous materials, or a combination thereof.
8.
The method of claim 1, wherein the particulate is coated by the organosilane.
9.
The method of claim 1, wherein the particulate has an organosilane coating
before introducing the fluid into a subterranean formation with exposed surfaces.
10.
The method of claim 1, further comprising degrading at least a portion of the
wettability modification of the particulate or surface or both.
11.
The method of claim 1, wherein the organosilane bears a functional group that
comprises a linear alkane, branched alkane, polymeric alkane, oligo(ethylene glycol),
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oligo(propylene glycol), vinyl, sulfate, sulfonate, phosphonate, carboxylate, tertiary
ammonium, or a combination thereof.
12.
The method of claim 1, wherein the organosilane is methyltrimethoxysilane,
hexyltrimethoxysilane,
heptyltrimethoxysilane,
propylmethyldimethoxysilane,
trimethylmethoxysilane,
octadecyltrimethoxysilane
propyldimethylmethoxysilane,
isooctyltrimethoxysilane,
phenylethtrimethoxysilane,
cyclohexyltrimethoxysilane,
benzyltriethoxysilane,
1H,1H,2H,2H-perfluorodecyltrimethoxysilane,
3,3,3-trifluoropropyltrimethoxysilane,
p-tolyltrimethoxysilane,
nonafluorohexyltrimethoxysilane,
2-cyanoethyltrimethoxysilane,
methyldimethoxysilyl)propyl]-polypropylene
oxide,
2Bis[N,N’-
[methoxy(polyethyleneoxy)propyl[-trimethoxysilane,
(triethoxysilylpropyl)aminocarbonyl]polyethylene oxide,
aminopropyltriethoxysilane,
Bis(2-hydroxyethyl)-3-
N-(3-triethoxysilylpropyl)gluconamide,
(triethoxysilylproppyl)-O-polyethylene oxide urethane,
trihydroxysilylpropylmethylphosphonate,
triethoxysilylpropyl
chloride,
3-
2-[acetoxy(polyethyleneoxy)-
acetamidopropyltrimethoxysilane,
urea,
N-
carboxyethylsilanetriol,
octadeculdimethyl(3-trimethoxysilylpropyl)ammonium
propyl]triethoxysilane,
Bis[(3-
N,N-dioctyl-N’-
(3-triethyxysilylpropyl)-t-Butylcarbamate,
S-
(octanoyl)mercaptopropyltriethoxysilane, or a combination thereof.
13.
The method of claim 1, further comprising gravel packing, hydraulic
fracturing, or acid fracturing.
14.
A method for treating a subterranean formation with a fluid, comprising:
forming a fluid comprising a particulate and an organosilane;
introducing the fluid into a subterranean formation with exposed surfaces; and
modifying the wettability of the proppant or surfaces or both,
wherein the wettability modification degrades.
15.
The method of claim 14, wherein the particulate is coated by the organosilane.
16.
The method of claim 14, wherein the particulate has an organosilane coating
prior to injection downhole.
17.
The method of claim 14, wherein at least about 50 percent of the wettability
modification degrades upon exposure to a pH of about 7.5 or higher after at least
about 2 hours.
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18.
The method of claim 14, wherein at least about 50 percent of the wettability
modification degrades upon exposure to a temperature of about 50°C or higher after at
least about 2 hours.
19.
The method of claim 14, wherein the organosilane is methyltrimethoxysilane,
hexyltrimethoxysilane,
heptyltrimethoxysilane,
propylmethyldimethoxysilane,
trimethylmethoxysilane,
octadecyltrimethoxysilane
propyldimethylmethoxysilane,
isooctyltrimethoxysilane,
phenylethtrimethoxysilane,
cyclohexyltrimethoxysilane,
benzyltriethoxysilane,
1H,1H,2H,2H-perfluorodecyltrimethoxysilane,
3,3,3-trifluoropropyltrimethoxysilane,
p-tolyltrimethoxysilane,
nonafluorohexyltrimethoxysilane,
2-cyanoethyltrimethoxysilane,
methyldimethoxysilyl)propyl]-polypropylene
oxide,
2Bis[N,N’-
[methoxy(polyethyleneoxy)propyl[-trimethoxysilane,
(triethoxysilylpropyl)aminocarbonyl]polyethylene oxide,
aminopropyltriethoxysilane,
Bis(2-hydroxyethyl)-3-
N-(3-triethoxysilylpropyl)gluconamide,
(triethoxysilylproppyl)-O-polyethylene oxide urethane,
trihydroxysilylpropylmethylphosphonate,
triethoxysilylpropyl
chloride,
3-
2-[acetoxy(polyethyleneoxy)-
acetamidopropyltrimethoxysilane,
urea,
N-
carboxyethylsilanetriol,
octadeculdimethyl(3-trimethoxysilylpropyl)ammonium
propyl]triethoxysilane,
Bis[(3-
N,N-dioctyl-N’-
(3-triethyxysilylpropyl)-t-Butylcarbamate,
S-
(octanoyl)mercaptopropyltriethoxysilane, or a combination thereof.
20.
The method of claim 14, wherein the organosilane bears a functional group
that comprises a linear alkane, branched alkane, polymeric alkane, oligo(ethylene
glycol), oligo(propylene glycol), vinyl, sulfate, sulfonate, phosphonate, carboxylate,
tertiary ammonium, or a combination thereof.
21.
A method of producing hydrocarbon from a subterranean formation,
comprising:
providing a wellbore in a subterranean formation;
forming a fluid comprising a particulate and an organosilane with the chemical
formula RnSiX4-n, wherein n is equal to 1, 2, or 3, R is an organic functional group,
and X is a halogen, alkoxy, or acetoxy group;
introducing the fluid into the subterranean formation with exposed surfaces;
modifying the wettability of a surface of the particulate or the subterranean
formation or both; and
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producing hydrocarbon from the wellbore in the subterranean formation.
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ABSTRACT
A method and composition for treating a subterranean formation with a fluid,
including forming a fluid including a particulate and an organosilane with the
chemical formula RnSiX4-n, wherein n is equal to 1, 2, or 3, R is an organic functional
group, and X is a halogen, alkoxy, or acetoxy group, introducing the fluid into a
subterranean formation with exposed surfaces, and modifying the wettability of a
surface of the particulate or subterranean formation or both. A method and
composition for treating a subterranean formation with a fluid including forming a
fluid comprising a particulate and an organosilane, introducing the fluid into a
subterranean formation with exposed surfaces, and modifying the wettability of the
proppant or surfaces or both, wherein the wettability modification degrades. A
method and composition for producing hydrocarbon from a subterranean formation,
including providing a wellbore in a subterranean formation, forming a fluid including
a particulate and an organosilane with the chemical formula RnSiX4-n, wherein n is
equal to 1, 2, or 3, R is an organic functional group, and X is a halogen, alkoxy, or
acetoxy group, introducing the fluid into the subterranean formation with exposed
surfaces, modifying the wettability of a surface of the particulate or the subterranean
formation or both, and producing hydrocarbon from the wellbore in the subterranean
formation.
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Figure 1.
O
Quartz
Substrate, SiO2
X3Si-(CH2CH2O)xC(CH2)n
Heat
O
SiO2
Si-(CH2CH2O)xC(CH2)n
Heat,
H2O
SiO2
Si-(CH2CH2O)xH
+
O
HOC(CH2)n
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Figure 2. Example 1 Contact angle of coated glass slides.
R-SiX3
R=
Structure
(uncoated glass)
Methyl
H 3CO
H 3CO
Contact Angle
hydrophilic
23.8
hydrophobic
89.8
methyltrimethoxysilane
CH 3
Si
Proposed wettability
H3CO
Octadecyl
H 3CO
H 3CO
hydrophobic
Si
91.1
octadecyltrimethoxysilane
(CH2 )17CH3
H3 CO
1H,1H,2H,2H-perfluorodecyl
hydrophobic
H 3CH 2CO
H3 CH 2CO
Si
CH 2CH2 (CF2 )7CF3
H3 CH2 CO
7
93.0
1H,1H,2H,2H-perfluorodecyltriethoxysilane
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INSERT FIGURE THREE HERE
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Figure 4. Example 2: conductivity measurements using coated proppant
Coating
k, Permeability (D)
C, Conductivity (md*ft)
Pack width (cm)
(uncoated rep #1)
Hydrophilic
198
3779
0.544
(uncoated rep #2)
Hydrophilic
212
3606
0.556
Methoxy-(PEO)-propyl
Hydrophilic
201
3585
0.544
1H,1H,2H,2H-perfluorodecyl
Hydrophobic
253
4150
0.500
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Peak Area (2935 cm-1)
0.3
0.25
pH 10
0.2
0.15
0.1
0.05
0
0
2
4
No. of Days at 70C
Figure 5.
10
6
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0.09
Peak Area (2950 cm-1)
0.08
0.07
0.06
0.05
0.04
0.03
0.02
pH 6
0.01
pH 10
0
0
2
4
6
No. of Days at 70 C
Figure 6.
11
8
10
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Figure 7
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Peak Area (2923 cm-1)
0.7
0.6
0.5
0.4
0.3
120 C, pH 10
0.2
70 C, pH 10
0.1
0
0
2
4
6
No. of Days at Temperature
Figure 8
13
8
10
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Peak Area (2956 cm-1)
0.3
0.25
0.2
0.15
120 C, pH 10
0.1
0.05
0
0
2
4
No. of Days at 120 C
Figure 9
14
6
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