Dual breaker system for reducing formation damage during fracturing

Patent metadata

Field	Value
Publication number	US-2016237336-A1
Application number	US-201315026542-A
Country	US
Kind code	A1
Filing date	Nov 7, 2013
Priority date	Nov 7, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

Methods and compositions for use in subterranean operations are disclosed comprising providing a treatment fluid that comprises a base fluid, a gelling agent, and a synergistic breaker composition, comprising: a controlled degradable acid generating material, and an oxidizing component; introducing the treatment fluid into a formation; allowing the synergistic breaker composition to substantially reduce the viscosity of the treatment fluid.

First claim

What is claimed is:

1 . A method comprising:
providing a treatment fluid that comprises a base fluid, a gelling agent, and a synergistic breaker composition, comprising:
a controlled degradable acid generating material; and
an oxidizing component;
introducing the treatment fluid into a formation; and allowing the synergistic breaker composition to substantially reduce the viscosity of the treatment fluid.

2 . The method of claim 1 , wherein the base fluid is an aqueous base fluid.

3 . The method of claim 2 , wherein the aqueous base fluid is seawater, produced water, formation water, salt-fortified fresh water, fresh water, salt-fortified sea water, or heavy brine solution.

4 . The method of claim 1 , wherein the oxidizing component has a concentration from 0.1 to 4 parts per thousand.

5 . The method of claim 1 , wherein the controlled degradable acid generating material has a concentration from 1 to 10 parts per thousand.

6 . The method of claim 1 , wherein the treatment fluid comprises a crosslinked hydrogel.

7 . The method of claim 6 , wherein the crosslinked hydrogel is crosslinked carboxymethylhydroxyethyl cellulose.

8 . A synergistic breaker composition, comprising:
a controlled degradable acid generating material; and an oxidizing component.

9 . The composition of claim 8 , further comprising a treatment fluid.

10 . The composition of claim 9 , wherein the treatment fluid comprises an aqueous base fluid.

11 . The composition of claim 9 , wherein the treatment fluid comprises a crosslinked hydrogel.

12 . The composition of claim 11 , wherein the crosslinked hydrogel is crosslinked carboxymethylhydroxyethyl cellulose.

13 . The composition of claim 8 , wherein the oxidizing component is sodium persulfate.

14 . The composition of claim 8 , wherein the oxidizing component has a concentration from 0.1 to 4 parts per thousand.

15 . The composition of claim 8 , wherein the controlled degradable acid generating material is polylactic acid.

16 . The composition of claim 8 , wherein the controlled degradable acid generating material has a concentration from 1 to 10 parts per thousand.

17 . A method of treating a formation, comprising:
providing a synergistic breaker composition, comprising:
a controlled degradable acid generating material; and
an oxidizing component;
providing a treatment fluid comprising a base fluid and a gelling agent; introducing the treatment fluid into a formation; adding to the treatment fluid a synergistic breaker composition; and allowing the synergistic breaker composition to interact with the treatment fluid to substantially reduce the viscosity of the treatment fluid.

18 . The method of claim 17 , further comprising recovering the treatment fluid from the formation.

19 . The method of claim 18 , wherein the formation has a permeability of between about 10 μD to 20 D after recovering the treatment fluid from the formation.

20 . The method of claim 18 , wherein the formation has a permeability of between about 100 mD to 2 D after recovering the treatment fluid from the formation.

Assignees

• Halliburton Energy Services Inc

Inventors

• Cortez Janette
• Ogle James W
• Singh Dipti

Classifications

• C09K8/62

  Compositions for forming crevices or fractures · CPC title

• C09K2208/26

  Gel breakers other than bacteria or enzymes · CPC title

• E21B43/267

  reinforcing fractures by propping · CPC title

• C09K8/5755

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C09K8/572

  containing inorganic compounds · CPC title