Porous cement composition for propping fractures open

Patent metadata

Field	Value
Publication number	US-10011764-B2
Application number	US-201514621179-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Feb 12, 2015
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A method of fracturing a subterranean formation comprising: introducing a fracturing fluid into the subterranean formation to create or enhance one or more fractures in the subterranean formation; introducing a cement composition into the one or more fractures, wherein the cement composition comprises: (A) cement; (B) water; and (C) an additive; and allowing the cement composition to set, wherein the additive creates a plurality of pores within the set cement.

First claim

What is claimed is:

1. A method of fracturing a subterranean formation comprising:
introducing a fracturing fluid into the subterranean formation to create or enhance one or more fractures in the subterranean formation;
introducing a cement composition into the one or more fractures, wherein the cement composition comprises:
(A) cement;
(B) water; and
(C) a pore-generative additive, wherein the pore-generating additive consists essentially of a gas-generating compound; and

allowing the cement composition to set, wherein the gas is generated during the setting of the cement composition, wherein the pore-generating additive creates a plurality of pores within the set cement, wherein a percentage of the pores are interconnected thereby providing a desired amount of permeability to the set cement composition; wherein the amount of gas produced by the gas-generating compound is in the range of 40% to 60% by volume of the cement composition; wherein the gas-generating compound is in a concentration of about 5% to about 60% by weight of the cement.

2. The method according to claim 1 , wherein the cement is selected from the group consisting of Class A cement, Class C cement, Class G cement, Class H cement, and any combination thereof.

3. The method according to claim 1 , wherein the cement is a thixotropic cement.

4. The method according to claim 1 , wherein the cement is selected from the group consisting of Portland cement, Gypsum cement, Joppa cement, Dyckerhoff cement, Slag cement, high aluminate cements, such as calcium-aluminate cements, calcium magnesia cements, and any combination thereof.

5. The method according to claim 1 , wherein the water is selected from the group consisting of freshwater, brackish water, seawater, and saltwater, in any combination thereof in any proportion.

6. The method according to claim 1 , wherein the cement composition further comprises a water-soluble salt.

7. The method according to claim 1 , wherein the gas-generating compound is selected from the group consisting of: compounds comprising hydrazine or azo groups, including azobis(isobutyronitrile), carbohydrazide; nitrogen generating compounds, including ammonium salts of organic or inorganic acids, hydroxylamine sulfate, carbamide; and combinations thereof.

8. The method according to claim 1 , wherein the step of introducing comprises pumping the fracturing fluid into the subterranean formation using a pump.

Assignees

• Halliburton Energy Services Inc

Inventors

• Bhamidipati Venkata Satya Srikalyan
• Benoit Denise N
• Weaver Jimmie D
• Nguyen Philip D

Classifications

• C04B2103/0071

  Phase-change materials, e.g. latent heat storage materials used in concrete compositions · CPC title

• C04B24/36

  Bituminous materials, e.g. tar, pitch {(C04B24/243 takes precedence)} · CPC title

• C04B24/06

  containing hydroxy groups · CPC title

• C09K8/80 Primary

  Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open · CPC title

• C04B24/12

  Nitrogen containing compounds {organic derivatives of hydrazine (hydrazine C04B22/00)} · CPC title