HYDROPHOBIC COATING OF PARTICULATES FOR ENHANCED WELL PRODUCTIVITY
Compositions and methods for coated or uncoated particulates, such as proppants, are provided that can, among other things, provide a hydrophobic surface that can enhance well productivity and other compositions and methods are disclosed.
1 - 22 . (canceled)
23 . A coated particulate, wherein the coating comprises a mixture a polybutadiene and fumed silica.
24 - 30 . (canceled)
31 . A method of extracting oil and/or gas from a subterranean stratum, the method comprising:
injecting into the subterranean stratum a coated particulate of claim 23 ; and
extracting the oil and/or gas from the subterranean stratum.
32 . The method of 31 , further comprising injecting a gas into the subterranean stratum after the injection of the coated particulate.
33 . A method of cleaning out a well bore comprising a coated particulate of claim 23 , the method comprising injecting a gas into the well bore to suspend the coated particulates in the well bore and displacing the coated particulate from the well bore.
34 . A method of preparing coated particulates of claim 23 , the method comprising mixing a polybutadiene and fumed silica with the particulates to produce the coated particulates.
35 . (canceled)
36 . A coated particulate comprising a particulate core coated with an optional compatibilizing agent and a hydrophobic polymer coating the particulate core, wherein a portion of the hydrophobic polymer is exposed to provide an exposed hydrophobic surface of the coated particulate.
37 . The coated particulate of claim 36 , wherein the compatibilizing agent binds the hydrophobic polymer to the particulate.
38 . The coated particulate of claim 36 , wherein the compatibilizing agent is an alkoxysilane, a surfactant, an alkoxylated alcohol, or an acrylate polymer, or any combination thereof.
39 . The coated particulate of claim 38 , wherein the alkoxysilane is a methoxysilane, ethoxysilane, butoxysilane, or octoxysilane.
40 . (canceled)
41 . The coated particulate of claim 38 , wherein the surfactant is a hydroxysultaine.
42 - 44 . (canceled)
45 . The coated particulate of claim 36 , wherein the hydrophobic polymer is a polyurethane.
46 . The coated particulate of claim 36 , wherein the hydrophobic polymer is a non-siloxane hydrophobic polymer.
47 . The coated particulate of claim 36 , wherein the hydrophobic polymer is a cured hydrophobic polymer.
48 . The coated particulate of claim 36 , wherein the hydrophobic polymer is a polybutadiene.
49 . The coated particulate of claim 36 , wherein the hydrophobic polymer is a cured polybutadiene.
50 . The coated particulate of claim 36 , wherein the % wt of the hydrophobic polymer is less than or equal to 0.5% wt of the particulate.
51 . The coated particulate of claim 36 , wherein the coated particulate is substantially free of a hydrogel or free of a frother.
52 - 53 . (canceled)
54 . The coated particulate of claim 36 , wherein the particulate core is sand.
55 - 68 . (canceled)
69 . A method of extracting oil and/or gas from a previously fractured subterranean stratum comprising proppants, the method comprising:
injecting into the previously fractured subterranean stratum comprising proppants a coated particulate comprising a particulate core with an optional compatibilizing agent and a hydrophobic polymer coating the particulate core, wherein a portion of the hydrophobic polymer is exposed to provide an exposed hydrophobic surface of the coated particulate; and
extracting the oil and/or gas from the previously fractured subterranean stratum.
70 . The method of claim 69 , further comprising injecting a gas with or after the injection of the proppants.
71 - 82 . (canceled)