Stabilizing unconsolidated formation for fines control
A method for treating a zone of a subterranean formation penetrated by a wellbore, the method including the steps of: (A) introducing a treatment fluid through the wellbore into the zone of the subterranean formation, wherein the treatment fluid comprises an alkoxysilane having at least two alkoxy groups; (B) shutting in the zone to allow the alkoxysilane to hydrolyze in the formation under the design conditions; and (C) before or after introducing the treatment fluid into the zone, installing a mechanical sand control device in the wellbore of the zone.
1. A method for treating a zone of a subterranean formation penetrated by a wellbore, the method comprising the steps of:
(A) introducing a treatment fluid through the wellbore into the zone of the subterranean formation, wherein the treatment fluid consists of an aqueous phase, a pH adjuster, and one or more tetra alkoxy silanes;
(B) introducing a catalyst through the wellbore into the zone of the subterranean formation;
(C) shutting in the zone to allow the one or more tetra alkoxysilanes to hydrolyze in the presence of the catalyst in the subterranean formation; and
(D) before or after introducing the treatment fluid into the zone, installing a mechanical sand control device in the wellbore of the zone.
2. The method according to claim 1 , wherein the subterranean formation is a sandstone formation.
3. The method according to claim 1 , wherein the subterranean formation is a gas reservoir having a permeability greater than about 5 mD.
4. The method according to claim 1 , wherein the subterranean formation is an oil reservoir having a permeability greater than about 20 mD.
5. The method according to claim 1 , wherein the one or more tetra alkoxy silanes comprise alkoxy groups independently selected from an —OR group wherein R is a methyl, ethyl, propyl, isopropyl, butyl, or isobutyl group.
6. The method according to claim 1 , wherein the one or more tetra alkoxysilanes do not comprise a vinyl group.
7. The method according to claim 1 , wherein the one or more tetra alkoxysilanes is in a concentration of at least 10% by weight of the aqueous phase of the treatment fluid.
8. The method according to claim 1 , additionally comprising the step of: saturating the zone of the subterranean formation with a preflush treatment fluid.
9. The method according to claim 8 , wherein the preflush treatment fluid comprises a continuous aqueous phase that comprises an inorganic salt.
10. The method according to claim 1 , further comprising adjusting the pH of the aqueous phase of the treatment fluid to be greater than 9.
11. The method according to claim 1 , further comprising adjusting the pH of the aqueous phase of the treatment fluid to be less than 5.
12. The method according to claim 1 , wherein the catalyst is selected from the group consisting of: titanium(IV) or zirconium(IV), and any combination thereof.
13. The method according to claim 1 , wherein the mechanical sand control device is selected from the group consisting of: a perforated liner, a slotted pipe, a wire-wrapped screen, a non-expandable screen, and an expandable screen.
14. The method according to claim 1 , wherein the mechanical sand control device is not gravel packed.
15. The method according to claim 1 , further comprising the step of: before or after the step of introducing the treatment fluid, introducing a fracturing fluid into the wellbore at a pressure sufficient to create at least one fracture in the subterranean formation.
16. The method according to claim 1 , the method further comprising the step of: after the steps of shutting in and installing the mechanical sand control device, producing fluid from the subterranean formation through the mechanical sand control device.
17. The method according to claim 1 , wherein the pH adjuster is a strong base or a strong acid.
18. The method according to claim 1 , wherein the pH adjuster comprises at least one component selected from the group consisting of: NaOH, Na 2 CO 3 , and Mg(OH) 2 .