Composites for use in stimulation and sand control operations

Patent metadata

Field	Value
Publication number	US-9562188-B2
Application number	US-201414491944-A
Country	US
Kind code	B2
Filing date	Sep 19, 2014
Priority date	Sep 20, 2013
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

A composite having a solid particulate and a surface modifying treatment agent on the solid particulate wherein the surface modifying treatment agent has a hydrophobic tail and an anchor for adhering the hydrophobic tail onto the solid particulate. The anchor may be metal and the hydrophobic tail may be an organo-silicon material, a fluorinated hydrocarbon or both an organo-silicon material and a fluorinated hydrocarbon. The composite may be used as a proppant in a hydraulic fracturing operation as well as a sand control particulate in a gravel packing operation. The presence of the surface modifying treatment agent on the surface of the solid particulate reduces the generation of fines and dust as well as the migration of sand during a hydraulic fracturing operation or a sand control operation. The presence of the surface modifying treatment agent on the surface of the solid particulate further enhances the crush resistance of the solid particulate.

First claim

What is claimed is:

1. A composite for treating a well wherein the composite comprises a surface modifying treatment agent at least partially coated onto a solid particulate and wherein the surface modifying treatment agent comprises a metallic anchor and a hydrophobic tail wherein the hydrophobic tail is an organo-silicon material, a fluorinated hydrocarbon or both a hydrophobic organo-silicon material and a fluorinated hydrocarbon and further wherein the metallic anchor of the surface modifying treatment agent is attached to the solid particulate.

2. The composite of claim 1 , wherein the hydrophobic tail is a derivative of a silane, polysiloxane or a polysilazane.

3. The composite of 1 , wherein the metal of the metallic anchor is a Group 3, 4, 5, or 6 metal.

4. The composite of claim 3 , wherein the metal of the metallic anchor is selected from the group consisting of Ti, Zr, La, Hf, Ta, W and Nb.

5. The composite of claim 1 , wherein the hydrophobic tail is a derivative of an organo-silicon of the formula:
R 1 4-x SiA x or (R 1 3 Si) y B

or an organo(poly)siloxane or organo(poly)silazane of the formula:

where:
R l are identical or different and are a hydrocarbon or substituted hydrocarbon radical containing from 1 to 100 carbon atoms;
A is hydrogen, halogen, OH, OR 2 or

B is NR 3 3-y ;
R 2 is a hydrocarbon or substituted hydrocarbon radical containing from 1 to 12 carbon atoms;
R 3 is hydrogen or R 1 ;
x is 1, 2 or 3; and

y is 1 or 2.

6. The composite of claim 5 , wherein the organo(poly)siloxane or organo(poly)silazane has units of the formula:

where R 1 are identical or different and are a hydrocarbon or substituted hydrocarbon radical containing from about 1 to about 12 carbon atoms; and R 3 is hydrogen or R 1 .

7. The composite of claim 1 , wherein the fluorinated hydrocarbon contains the structure:

where Y is F or C n F 2n+1 ; m is 4 to 20 and n is 1 to 6; R 2 is alkyl containing from 1 to 4 carbon atoms and p is 0 to 18.

8. The composite of claim 1 , wherein the fluorinated hydrocarbon is of the structure:

where A is an oxygen radical or a chemical bond; n is 1 to 6, Y is F or C n F 2n ; b is at least 1; m is 0 to 6 and p is 0 to 18.

9. The composite of claim 1 , wherein the hydrophobic tail contains units of R 5 2 SiO 2 where R 5 is halogen.

10. The composite of claim 1 , further comprising an adherent between the solid particulate and the metallic anchor of the surface modifying agent for bonding the metallic anchor to the solid particulate.

11. The composite of claim 10 , wherein the adherent is an organometallic compound.

12. The composite of claim 11 , wherein the organometallic compound comprises a transition metal selected from the group consisting of titanium, zirconium, lanthanum, hafnium, tantalum and tungsten and mixtures thereof.

13. The composite of claim 1 , wherein the solid particulate is selected from the group consisting of ceramics, sand, minerals, nut shells, gravel, polymeric particles, and mixtures thereof.

14. The composite of claim 13 , wherein the polymeric particles are beads or pellets of polystyrene, nylon, polystyrene divinylbenzene, polyethylene terephthalate or a combination thereof.

15. The composite of claim 13 , wherein the solid particulate further has a resinous coating.

16. A proppant or sand control particulate comprising the composite of claim 1 .

17. The composite of claim 1 , wherein the solid particulate comprises an elastomer.

18. The composite of claim 17 , wherein the elastomer is selected from the group consisting of natural rubber, ethylene-propylene-diene polymers (EPDM), nitrile rubbers, carboxylated acrylonitrile butadiene copolymers, polyvinylchloride-nitrile butadiene blends, chlorinated polyethylene, chlorinated sulfonate polyethylene, aliphatic polyesters having chlorinated side chains, polyacrylate rubbers, ethylene-acrylate terpolymers, copolymers of ethylene and propylene, and optionally with one or more other ethylenically unsaturated monomers, ethylene vinyl acetate copolymers, fluorocarbon polymers and copolymers, polyvinyl methyl ether, butadiene rubber, polychloroprene rubber, polyisoprene rubber, polynorbornenes, polysulfide rubbers, polyurethanes, silicone rubbers, vinyl silicone rubbers, fluoromethyl silicone rubber, fluorovinyl silicone rubbers, phenylmethyl silicone rubbers, styrene-butadiene rubbers, copolymers of isobutylene and isoprene or butyl rubbers, brominated copolymers of isobutylene and isoprene and chlorinated copolymers of isobutylene and isoprene and mixtures thereof.

19. The composite of claim 18 , wherein the elastomer is natural rubber or a polymer of at least one of the monomers selected from the group consisting of vinylidene fluoride, hexafluoropropylene, tetrafluoroethylene, chlorotrifluoroethylene, perfluoro(alkyl vinyl ether).

20. A method for treating a well penetrating a subterranean formation, comprising introducing into the well the composite of claim 1 or forming the composite in-situ in the well.

21. The method of claim 20 wherein at least one of the following conditions prevail:
(a) the surface modifying treatment agent functions as a passive anti-microbial agent;
(b) the surface modifying treatment agent functions to passively inhibit or control scale deposition onto or within the subterranean formation;
(c) the surface modifying treatment agent of the composite passively prevents or controls deposition of organic particulates onto or within the surface of the subterranean formation; or
(d) the surface modifying treatment agent of the composite controls proppant flowback.

22. The method of claim 20 , wherein the composite is pumped into the well during a hydraulic fracturing operation and further wherein the solid particulate is capable of withstanding stresses greater than about 1500 psi at a temperature greater than 150° F.

23. The method of claim 20 , wherein the composite is formed in-situ in the well by first pumping the solid particulate into the well and then at least partially coating the solid particulate by subsequently pumping the surface modifying treatment agent into the well.

24. A composite for treating a wellbore, wherein the composite comprises a solid particulate and a surface modifying treatment agent at least partially coated onto a solid particulate, the surface modifying treatment agent comprising an anchor and at least one hydrophobic tail attached to the anchor wherein the anchor is attached to the solid particulate.

25. The composite of claim 24 , wherein the surface modifying treatment agent is a reaction product of an organometallic compound having an oxygen ligand and an organo-silicon containing material.

26. The composite of claim 24 , wherein the surface modifying treatment agent is of the formula X-M where M is a metal containing organic ligand and

Assignees

• Baker Hughes Inc

Inventors

• Monroe Terry D
• Beall Brian B
• Bestaoui-Spurr Naima
• Bhaduri Sumit
• Lant Kimberly
• Le Hoang
• Qu Qi

Classifications

• E21B43/14

  Obtaining from a multiple-zone well · CPC title

• C09K8/56

  Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof (compositions for plastering borehole walls C09K8/50; {Soil-conditioning materials or soil-stabilising materials in general C09K17/00}) · CPC title

• C09K8/524

  organic depositions, e.g. paraffins or asphaltenes · CPC title

• E21B43/267

  reinforcing fractures by propping · CPC title

• C09K8/805 Primary

  Coated proppants · CPC title