Hydrating swellable clays

Patent metadata

Field	Value
Publication number	US-10703676-B2
Application number	US-201616330726-A
Country	US
Kind code	B2
Filing date	Oct 13, 2016
Priority date	Oct 13, 2016
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A method may comprise: mixing a water having hardness at about 300 ppm or greater with a plurality of particulates, a swellable clay, a chelating agent at about 0.01% to about 5% by weight of the water (BWOW), and an alkali metal base at about 0.01% to about 5% BWOW to produce a treatment fluid; and introducing the treatment fluid into a wellbore penetrating a subterranean formation.

First claim

What is claimed is:

1. A method comprising:
mixing a water having hardness at about 300 ppm or greater with a plurality of particulates, a swellable clay, a chelating agent at about 0.01% to about 5% by weight of the water (BWOW), and an alkali metal base at about 0.01% to about 5% BWOW to produce a treatment fluid, wherein the chelating agent and alkali metal base reduce the negative effect of the water on hydrating swellable clays; and
introducing the treatment fluid into a wellbore penetrating a subterranean formation.

2. The method of claim 1 , wherein the treatment fluid is as drilling fluid and the plurality of particulates comprises weighting agents, and wherein the method further comprises drilling at least a portion of the well bore with the drilling fluid.

3. The method of claim 1 , wherein the treatment fluid is as fracturing fluid and the plurality of particulates comprises proppant, and wherein the method further comprises forming a proppant pack in at least a portion of the subterranean formation with the fracturing fluid.

4. The method of claim 1 , wherein the treatment fluid is as drilling fluid and the plurality of particulates comprises a cement, and wherein the method further comprises drilling at least a portion of the wellbore with the drilling fluid.

5. The method of claim 1 , wherein the treatment fluid is as cement slurry and the plurality of particulates comprises a cement, and wherein the method further comprises setting the cement slurry in at least a portion of the wellbore and/or the subterranean formation.

6. The method of claim 5 , wherein the cement comprises at least one selected from the group consisting of: perlite, cement kiln dust, fly ash, pumicite, slag, lime, shale, and Portland cement.

7. The method of claim 6 , wherein the Portland cement comprises at least one selected from the group consisting of: Class A, Class C, Class H, Class G, ASTM Type III, and ASTM Type V.

8. The method of claim 1 , wherein the swellable clay comprises at least one selected from the group consisting of: beidellite, montmorillonite, bentonite, nontronite, saponite, naturally occurring hectorite clay, synthetic hectorite clay, palygorskite, and lasallite.

9. The method of claim 1 , wherein the swellable clay is present at about 0.1% to about 30% by weight of the treatment fluid.

10. The method of claim 1 , wherein the chelating agent comprises at least one selected from the group consisting of: ethylenediaminetetraacetic acid, nitrilotriacetic acid, diethylenetriaminepentaacetic acid, trans-1,2-diaminocyclohexane-N,N,N′,N′-tetraacetic acid, citric acid, diglycolic acid, phosphoric acid, aspartic acid, tripolyphosphate, hexametaphosphate, aminotris(methylenephosphonic acid), 1-hydroxyethane-1, 1-diphosphonic acid, di methyl methylphosphonate, ethylenediaminetetra(methylenephosphonic acid), tetramethylenediaminetetra(methylenephosphonic acid), hexamethylenediaminetetra(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid), and a salt of any foregoing chelating agents.

11. The method of claim 1 , wherein the alkali metal base comprises at least one selected from the group consisting of: lithium hydroxide, sodium hydroxide, potassium hydroxide, and cesium hydroxide.

12. A system comprising:
a pump fluidly connected to a wellbore penetrating a subterranean formation that introduces a treatment fluid into the wellbore, wherein the treatment fluid is formed by mixing a water having hardness at about 300 ppm or greater with a plurality of particulates, a swellable clay, a chelating agent at about 0.01% to about 5% by weight of the water (BWOW), and an alkali metal base at about 0.01% to about 5% BWOW, wherein the chelating agent and alkali metal base reduce the negative effect of the water on hydrating swellable clays.

Assignees

• Halliburton Energy Services Inc

Inventors

• Patil Sandip Prabhakar
• Abdulrazzaq Waseem
• Singh Sheetal
• Mishra Vaishali
• Alburaikan Reem Mohammed

Classifications

• C04B28/04 Primary

  Portland cements · CPC title

• Y02W30/91

  Use of waste materials as fillers for mortars or concrete · CPC title

• C09K8/16 Primary

  characterised by the inorganic compounds other than clay · CPC title

• C09K8/845

  containing inorganic compounds · CPC title

• C09K8/665

  containing inorganic compounds (proppants C09K8/80) · CPC title