CA2631000A1 - Apparatus, compositions, and methods of breaking fracturing fluids - Google Patents
Apparatus, compositions, and methods of breaking fracturing fluids Download PDFInfo
- Publication number
- CA2631000A1 CA2631000A1 CA 2631000 CA2631000A CA2631000A1 CA 2631000 A1 CA2631000 A1 CA 2631000A1 CA 2631000 CA2631000 CA 2631000 CA 2631000 A CA2631000 A CA 2631000A CA 2631000 A1 CA2631000 A1 CA 2631000A1
- Authority
- CA
- Canada
- Prior art keywords
- fluid
- viscosity
- microbe
- formation
- gelled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/706—Encapsulated breakers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/24—Bacteria or enzyme containing gel breakers
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Colloid Chemistry (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Medicinal Preparation (AREA)
Abstract
Apparatus and methods of reducing the viscosity of a gelled fluid is provided.
In one embodiment, a viscosity reducing microbe is disposed in a capsule and added to the gelled fluid. The gelled fluid may include a thickening agent adapted to increase its viscosity. Upon release from the capsule, the microbe begins to digest the thickening agent in the gelled fluid and/or releases enzymes that that breakdown the thickening agent.
In one embodiment, a viscosity reducing microbe is disposed in a capsule and added to the gelled fluid. The gelled fluid may include a thickening agent adapted to increase its viscosity. Upon release from the capsule, the microbe begins to digest the thickening agent in the gelled fluid and/or releases enzymes that that breakdown the thickening agent.
Claims (16)
1. A method for reducing viscosity of a gelled fluid, comprising:
forming a gelled fluid; and adding an effective amount of a microbial composition to the fluid to reduce the viscosity of the gelled fluid, where the microbial composition includes a viscosity reducing microbe.
forming a gelled fluid; and adding an effective amount of a microbial composition to the fluid to reduce the viscosity of the gelled fluid, where the microbial composition includes a viscosity reducing microbe.
2. A method for reducing viscosity of a gelled fluid, comprising:
forming a gelled fluid;
adding a first amount of a first microbial composition to the fluid, where the first microbial composition comprises a viscosity reducing microbe; and adding a second amount of a second microbial composition to the fluid, where the second microbial composition comprises a viscosity reducing microbe surrounded by an encapsulating agent, where the first and second amount are adjusted to produce a desired viscosity reduction profile.
forming a gelled fluid;
adding a first amount of a first microbial composition to the fluid, where the first microbial composition comprises a viscosity reducing microbe; and adding a second amount of a second microbial composition to the fluid, where the second microbial composition comprises a viscosity reducing microbe surrounded by an encapsulating agent, where the first and second amount are adjusted to produce a desired viscosity reduction profile.
3. A method for reducing viscosity of a gelled fluid, comprising:
forming a gelled fluid, adding an effective amount of a releasable microbial composition comprising a viscosity reducing microbe, releasing the microbe in response to a change in a fluid property, where the release microbe or enzymes produced by the microbe reduce the viscosity to a desired value or according to a controlled viscosity reduction profile.
forming a gelled fluid, adding an effective amount of a releasable microbial composition comprising a viscosity reducing microbe, releasing the microbe in response to a change in a fluid property, where the release microbe or enzymes produced by the microbe reduce the viscosity to a desired value or according to a controlled viscosity reduction profile.
4. A method for fracturing a formation comprising:
pumping, into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, a fracturing fluid comprising:
a gelled fluid comprising a microbial digestible thickening agent, where the gelled fluid raises the viscosity of fluid to enhance the formation for fracture in the formation, a proppant, where the proppant props opened fracturing formed in the formation, injecting a microbial composition comprising a viscosity reducing microbe in the fluid, where the composition reduces the viscosity of the gelled fluid.
pumping, into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, a fracturing fluid comprising:
a gelled fluid comprising a microbial digestible thickening agent, where the gelled fluid raises the viscosity of fluid to enhance the formation for fracture in the formation, a proppant, where the proppant props opened fracturing formed in the formation, injecting a microbial composition comprising a viscosity reducing microbe in the fluid, where the composition reduces the viscosity of the gelled fluid.
5. A method for fracturing a formation including the step of:
pumping a fracturing fluid into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, where the fluid comprises:
a gelled fluid comprising a microbial digestible thickening agent, where the gelled fluid raises the viscosity of fluid to enhance the formation for fracture in the formation, pumping in a proppant fluid including a proppant, where the proppant props opened fracturing formed in the formation, and injecting a microbial composition comprising a viscosity reducing microbe in the fluid, where the composition reduces the viscosity of the gelled fluid.
pumping a fracturing fluid into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, where the fluid comprises:
a gelled fluid comprising a microbial digestible thickening agent, where the gelled fluid raises the viscosity of fluid to enhance the formation for fracture in the formation, pumping in a proppant fluid including a proppant, where the proppant props opened fracturing formed in the formation, and injecting a microbial composition comprising a viscosity reducing microbe in the fluid, where the composition reduces the viscosity of the gelled fluid.
6. A method for fracturing a formation including the step of:
pumping a fracturing fluid into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, a gelled fluid comprising a microbial digestible thickening agent, where the gelled fluid raises the viscosity of fluid to enhance the formation for fracture in the formation, pumping in a proppant fluid including a proppant, where the proppant props opened fracturing formed in the formation, pumping a delayed microbial composition comprising a viscosity reducing microbe in the fluid, where the composition is adapted to rupture in response to a change in a fluid property, and changing a fluid property to release the microbe.
pumping a fracturing fluid into a producing formation at a pressure sufficient to fracture the formation and to enhance productivity, a gelled fluid comprising a microbial digestible thickening agent, where the gelled fluid raises the viscosity of fluid to enhance the formation for fracture in the formation, pumping in a proppant fluid including a proppant, where the proppant props opened fracturing formed in the formation, pumping a delayed microbial composition comprising a viscosity reducing microbe in the fluid, where the composition is adapted to rupture in response to a change in a fluid property, and changing a fluid property to release the microbe.
7. A method as claimed in any preceding claim, further comprising:
adjusting the pH of the fluid to a pH between about 6 and 8.
adjusting the pH of the fluid to a pH between about 6 and 8.
8. A method as claimed in any preceding claim, further comprising:
adjusting the pH of the fluid to a pH between about 6.5 and 7.5.
adjusting the pH of the fluid to a pH between about 6.5 and 7.5.
9. A method as claimed in any preceding claim, further comprising:
adjusting the pH of the fluid to a pH between about 6.8 and 7.2
adjusting the pH of the fluid to a pH between about 6.8 and 7.2
10. A method as claimed in any preceding claim, further comprising:
adjusting the pH of the fluid to a pH of about 7.
adjusting the pH of the fluid to a pH of about 7.
11. An apparatus for reducing viscosity of a gelled fluid, comprising:
a capsule containing a viscosity reducing microbe disposed within the capsule, wherein the capsule is adapted to release the viscosity reducing microbe into gelled fluid over time or in response to a change in a fluid property.
a capsule containing a viscosity reducing microbe disposed within the capsule, wherein the capsule is adapted to release the viscosity reducing microbe into gelled fluid over time or in response to a change in a fluid property.
12. An apparatus for reducing viscosity of a gelled fluid, comprising:
an outer shell and an interior filled with a viscosity reducing microbe, where the outer shell is adapted to rupture in response to a change in a fluid property.
an outer shell and an interior filled with a viscosity reducing microbe, where the outer shell is adapted to rupture in response to a change in a fluid property.
13. A fluid composition for wellbore operations, comprising:
an aqueous fluid;
a fluid thickener; and a capsule containing a viscosity reducing microbe, where the viscosity reducing microbe, once released into the fluid, is adapted to degrade the fluid thickener upon contact therewith and where the capsule is designed to release the microbe in response to a change in a fluid property.
an aqueous fluid;
a fluid thickener; and a capsule containing a viscosity reducing microbe, where the viscosity reducing microbe, once released into the fluid, is adapted to degrade the fluid thickener upon contact therewith and where the capsule is designed to release the microbe in response to a change in a fluid property.
14. A composition for fracturing a subterranean formation containing a gas and/or crude oil and penetrated by a wellbore, the composition comprising:
a fracturing fluid including:
a gelled fluid and a microbial viscosity reducing composition, where the viscosity reducing microbe is adapted to degrade the fluid thickener upon contact therewith.
a fracturing fluid including:
a gelled fluid and a microbial viscosity reducing composition, where the viscosity reducing microbe is adapted to degrade the fluid thickener upon contact therewith.
15. A method, apparatus or composition as claimed in any preceding claim, wherein the gelled fluid includes a microbe degradable polymer thickening agent and the microbe or enzymes produced by the microbe degrades the polymer thickening agent.
16. A method, apparatus or composition as claimed in any preceding claim, wherein the microbial composition comprises a microbe surrounded by an encapsulating agent, where the agent is adapted to release the microbe in a controlled manner.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US91759807P | 2007-05-11 | 2007-05-11 | |
| US60/917,598 | 2007-05-11 | ||
| US12/116,072 US7942201B2 (en) | 2007-05-11 | 2008-05-06 | Apparatus, compositions, and methods of breaking fracturing fluids |
| US12/116,072 | 2008-05-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2631000A1 true CA2631000A1 (en) | 2008-11-11 |
| CA2631000C CA2631000C (en) | 2012-02-21 |
Family
ID=39571017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2631000 Expired - Fee Related CA2631000C (en) | 2007-05-11 | 2008-05-09 | Apparatus, compositions, and methods of breaking fracturing fluids |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2631000C (en) |
| GB (1) | GB2450204B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012045155A1 (en) * | 2010-10-06 | 2012-04-12 | Trican Well Service Ltd. | Enzyme breakers and methods for fluid systems |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012021373A1 (en) * | 2010-08-12 | 2012-02-16 | Conocophillips Company | Controlled release material |
| MX2019010453A (en) * | 2017-03-03 | 2019-10-15 | Locus Oil Ip Company Llc | Compositions and methods for microbial enhanced digestion of polymers in fracking wells. |
| WO2019022996A1 (en) | 2017-07-27 | 2019-01-31 | Locus Oil Company, Llc | Improved methods of selective and non-selective plugging for water flooding in enhanced oil recovery |
| WO2019094615A1 (en) | 2017-11-08 | 2019-05-16 | Locus Oil Ip Company, Llc | Multifunctional composition for enhanced oil recovery, improved oil quality and prevention of corrosion |
| CA3098893A1 (en) | 2018-04-30 | 2019-11-07 | Locus Oil Ip Company, Llc | Compositions and methods for paraffin liquefaction and enhanced oil recovery in oil wells and associated equipment |
| US11549053B2 (en) | 2018-07-30 | 2023-01-10 | Locus Solutions Ipco, Llc | Compositions and methods for enhanced oil recovery from low permeability formations |
| CA3109949A1 (en) | 2018-08-20 | 2020-02-27 | Locus Oil Ip Company, Llc | Methods for paraffin removal and extended post-primary oil recovery |
| CN112175874B (en) * | 2020-10-12 | 2023-04-07 | 天津科技大学 | Complex enzyme and method for treating guar gum fracturing fluid flowback fluid by using same |
| CN114635678B (en) * | 2022-02-24 | 2023-07-07 | 东北大学 | Microorganism combined hydraulic fracturing coal seam permeability-increasing system and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5869325A (en) * | 1996-03-22 | 1999-02-09 | Atlantic Richfield Company | Use of bacteria to break gels used in well treatment fluids |
| US7052901B2 (en) * | 2000-10-31 | 2006-05-30 | Baker Hughes Incorporated | Bacteria-based and enzyme-based mechanisms and products for viscosity reduction breaking of viscoelastic fluids |
| US7256160B2 (en) * | 2001-11-13 | 2007-08-14 | Baker Hughes Incorporated | Fracturing fluids for delayed flow back operations |
-
2008
- 2008-05-09 GB GB0808388A patent/GB2450204B/en not_active Expired - Fee Related
- 2008-05-09 CA CA 2631000 patent/CA2631000C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012045155A1 (en) * | 2010-10-06 | 2012-04-12 | Trican Well Service Ltd. | Enzyme breakers and methods for fluid systems |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0808388D0 (en) | 2008-06-18 |
| GB2450204A (en) | 2008-12-17 |
| GB2450204B (en) | 2011-10-12 |
| CA2631000C (en) | 2012-02-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20200831 |