Geopolymer cement slurries, cured geopolymer cement and methods of making and use thereof

Patent metadata

Field	Value
Publication number	US-2021292230-A1
Application number	US-202016822625-A
Country	US
Kind code	A1
Filing date	Mar 18, 2020
Priority date	Mar 18, 2020
Publication date	Sep 23, 2021
Grant date	—

Abstract

Geopolymer cement slurries, cured geopolymer cements, and methods of making cured geopolymer cement and methods of using geopolymer cement slurries are provided. The geopolymer cement slurry comprises cement precursor material, Saudi Arabian volcanic ash, and an aqueous solution. The Saudi Arabian volcanic ash comprises SO3, CaO, SiO2, Al2O3, Fe2O3, MgO, and K2O.

First claim

What is claimed is:

1 . A geopolymer cement slurry comprising:
an aqueous solution; Saudi Arabian volcanic ash, in which the Saudi Arabian volcanic ash comprises SO 3 , CaO, SiO 2 , Al 2 O 3 , Fe 2 O 3 , MgO, and K 2 O; Na 2 SiO 3 ; and NaOH.

2 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry comprises from 25 to 50 wt. % Na 2 SiO 3 and 15 to 35 wt. % NaOH.

3 . The geopolymer cement slurry of claim 1 , in which the Na 2 SiO 3 has a ratio of Na 2 O to SiO 2 of from 0.250:1 to 0.350:1.

4 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry comprises a pH of from 11.6-13.0.

5 . The geopolymer cement slurry of claim 1 , in which the Saudi Arabian volcanic ash has a particle size of from 20 to 30 μm.

6 . The geopolymer cement slurry of claim 1 , in which the Saudi Arabian volcanic ash is free of TiO 2 .

7 . The geopolymer cement slurry of claim 1 , in which the Saudi Arabian volcanic ash comprises from 40 wt. % to 50 wt. % SiO 2 and from 10 wt. % to 20 wt. % Al 2 O 3 .

8 . The geopolymer cement slurry of claim 1 , in which the Saudi Arabian volcanic ash comprises:
from 0.05 wt. % to 0.2 wt. % SO 3 ; from 5 wt. % to 10 wt. % CaO; from 40 wt. % to 50 wt. % SiO 2 ; from 10 wt. % to 20 wt. % Al 2 O 3 ; from 10 wt. % to 15 wt. % Fe 2 O 3 ; from 5 wt. % to 10 wt. % MgO; and from 0.5 wt. % to 5 wt. % K 2 O.

9 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry comprises a sodium aluminosilicate hydrate having a compressive strength of from 1500 to 2600 psi.

10 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry comprises a sodium aluminosilicate hydrate having a formula of:
Na n [(—SiO 2 ) z —AlO 2 ] n .yH 2 O, where n represents a degree of polymerization ranging 1 to 50 and z represents an amount of silicate ranging from 2 to 10.

11 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry comprises a sodium aluminosilicate hydrate having a structure of:

12 . The geopolymer cement slurry of claim 1 , in which aqueous solution comprises deionized water, tap water, fresh water, salt water, natural or synthetic brine, municipal water, formation water, produced water, well water, filtered water, distilled water, sea water, or combinations of these.

13 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry comprises from 30 to 60 wt. % Saudi Arabian volcanic ash.

14 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry further comprises a cement precursor material comprising one or more components selected from the group consisting of calcium hydroxide, silicates, belite (Ca 2 SiO 5 ), alite (Ca 3 SiO 4 ), tricalcium aluminate (Ca 3 Al 2 O 6 ), tetracalcium aluminoferrite (Ca 4 Al 2 Fe 2 O 10 ), brownmillerite (4CaO.Al 2 O 3 .Fe 2 O 3 ), gypsum (CaSO 4 .2H 2 O), sodium oxide, potassium oxide, lime (calcium oxide), hexavalent chromium, trivalent chromium, calcium aluminate, and combinations thereof.

15 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry further comprises one or more additives selected from the group consisting of dispersants, fluid loss control agents, retarders, expansion additives, antifoaming agents, stabilizers, accelerators, extenders, weighting agents, lost circulation control agents, surfactants, gypsum, hematite, manganese tetroxide, silica flour, and silica sand.

16 . The geopolymer cement slurry of claim 1 , in which the geopolymer cement slurry has a ratio of Na 2 SiO 3 combined with NaOH to Al 2 O 3 ranges from 0.5:1.0 to 9.0:1.0.

Assignees

• Saudi Arabian Oil Co

Inventors

• Alanqari Khawlah A
• Al-Yami Abdullah S

Classifications

• C04B28/26

  Silicates of the alkali metals · CPC title

• C04B28/006

  containing mineral polymers, e.g. geopolymers of the Davidovits type · CPC title

• Y02P40/10

  Production of cement, e.g. improving or optimising the production methods; Cement grinding · CPC title

• C09K8/46 Primary

  containing inorganic binders, e.g. Portland cement · CPC title

• C04B12/005 Primary

  Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates · CPC title