Method to use loss circulation material composition comprising alkaline nanoparticle-based dispersion and formate activator in downhole conditions

Patent metadata

Field	Value
Publication number	US-2025059092-A1
Application number	US-202318450958-A
Country	US
Kind code	A1
Filing date	Aug 16, 2023
Priority date	Aug 16, 2023
Publication date	Feb 20, 2025
Grant date	—

Abstract

A loss circulation material (LCM) includes an alkaline nanosilica dispersion and a formate activator. The formate activator may be present in an amount in a range of 1 wt % to 40 wt % of the loss circulation material. A method of controlling loss circulation in a loss circulation zone (LCZ) in a wellbore includes introducing an alkaline nanosilica dispersion into the wellbore, introducing a formate activator solution into the wellbore, contacting the alkaline nanosilica dispersion with the formate activator, thereby forming a LCM composition, and forming a gelled solid from the LCM in the loss circulation zone. A method of controlling loss circulation in a LCZ in a wellbore includes introducing a LCM that includes an alkaline nanosilica dispersion and a formate activator into the wellbore such that they contact the LCZ, and forming a gelled solid from the LCM in the LCZ.

First claim

What is claimed:

1 . A loss circulation material, comprising:
an alkaline nanosilica dispersion; and a formate activator, wherein the formate activator is present in an amount in a range of 1 wt % to 40 wt % of the loss circulation material.

2 . The loss circulation material of claim 1 , wherein the alkaline nanosilica dispersion comprises alkaline silica nanoparticles having a surface area in a range from 100 m 2 /g to 500 m 2 /g.

3 . The loss circulation material of claim 1 , wherein the alkaline nanosilica dispersion comprises alkaline silica nanoparticles in a range from 5 wt % to 65 wt %, and wherein the alkaline silica nanoparticles has a SiO 2 content in a range from 10 wt % to 65 wt %.

4 . The loss circulation material of claim 1 , wherein the formate activator is selected from the group consisting of sodium formate, potassium formate, cesium formate, and combinations thereof.

5 . The loss circulation material of claim 1 , wherein the alkaline nanosilica dispersion has a pH in a range from 8.5 to 11.5.

6 . The loss circulation material of claim 1 , further comprising a gelation accelerator an acidic gelation accelerator selected from the group consisting of organic acids, mineral acids, and combinations thereof.

7 . The loss circulation material of claim 6 , wherein the gelation accelerator mixes with the loss circulation material to decrease a pH of the loss circulation material.

8 . The loss circulation material of claim 7 , wherein the loss circulation material has an initial pH range of 8.5 to 11.5.

9 . The loss circulation material of claim 7 , wherein a decreased pH range of the loss circulation material is from 2 to 4.

10 . A method of controlling loss circulation in a lost circulation zone in a wellbore, comprising:
introducing an alkaline nanosilica dispersion into the wellbore; introducing a formate activator solution into the wellbore; contacting the alkaline nanosilica dispersion with the formate activator, thereby forming a loss circulation material composition wherein the formate activator is present in an amount in a range of 1 wt % to 40 wt % of the loss circulation material; and forming a gelled solid from the loss circulation material in the lost circulation zone.

11 . The method of claim 10 , further comprising accelerating a gelation rate of the loss circulation material for forming the gelled solid.

12 . The method of claim 11 , wherein accelerating the gelation rate comprises decreasing a pH of the loss circulation material.

13 . The method of claim 11 , wherein the formate activator is selected from the group consisting of sodium formate, potassium formate, cesium formate, and combinations thereof.

14 . The method of claim 10 , wherein the gelled solid forms in 1 to 24 hours.

15 . A method of controlling loss circulation in a lost circulation zone in a wellbore, comprising:
introducing a loss circulation material comprising an alkaline nanosilica dispersion and a formate activator into the wellbore such that they contact the loss circulation zone, wherein the formate activator is present in an amount in a range of 1 wt % to 40 wt % of the loss circulation material, and forming a gelled solid from the loss circulation material in the loss circulation zone.

16 . The method of claim 15 , further comprising accelerating a gelation rate of the loss circulation material for forming the gelled solid.

17 . The method of claim 16 , wherein accelerating the gelation rate comprises decreasing a pH of the loss circulation material proximate to the loss circulation zone.

18 . The method of claim 15 , wherein the alkaline nanosilica dispersion has a pH in a range from 8.5 to 11.5.

19 . The method of claim 15 , wherein the formate activator is selected from the group consisting of sodium formate, potassium formate, cesium formate, and combinations thereof.

Assignees

• Saudi Arabian Oil Co

Inventors

• Wagle Vikrant
• Kalgoankar Rajendra
• Al-Yami Abdullah
• Alharthi Mohammad

Classifications

• C09K8/487

  Fluid loss control additives; Additives for reducing or preventing circulation loss · CPC title

• C04B2103/46

  Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents · CPC title

• C04B28/24

  containing alkyl, ammonium or metal silicates; containing silica sols {(reaction mixtures resulting in mineral polymers C04B28/006; polymeric reaction products of alkali metal silicates with isocyanates C08G18/3895)} · CPC title

• C04B2103/445

  Gelling agents · CPC title

• C09K8/506

  containing organic compounds · CPC title