CA2356332A1 - Fluids and techniques for hydrocarbon well completion - Google Patents

Fluids and techniques for hydrocarbon well completion Download PDF

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Publication number
CA2356332A1
CA2356332A1 CA002356332A CA2356332A CA2356332A1 CA 2356332 A1 CA2356332 A1 CA 2356332A1 CA 002356332 A CA002356332 A CA 002356332A CA 2356332 A CA2356332 A CA 2356332A CA 2356332 A1 CA2356332 A1 CA 2356332A1
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CA
Canada
Prior art keywords
fluid
well completion
completion fluid
present
concentration
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
Application number
CA002356332A
Other languages
French (fr)
Other versions
CA2356332C (en
Inventor
Raymond J. Tibbles
Mehmet Parlar
Frank F. Chang
Diankui Fu
Mark Davison
Elizabeth W. A. Morris
Antje M. Wierenga
Palathinkara Vinod
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Schlumberger Canada Ltd
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Individual
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Filing date
Publication date
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Priority to CA2690140A priority Critical patent/CA2690140C/en
Publication of CA2356332A1 publication Critical patent/CA2356332A1/en
Application granted granted Critical
Publication of CA2356332C publication Critical patent/CA2356332C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S507/00—Earth boring, well treating, and oil field chemistry
    • Y10S507/925—Completion or workover fluid

Abstract

The Invention relates to novel fluids and techniques to optimize/enhance the production of hydrocarbon from subterranean formations (e.g., "completion fluids"), in particular, fluids and techniques are disclosed and claimed which remove wellbore damage and near-wellbore damage in the form of coating formed from drilling and production-related operations ("filtercake"); the techniques can be applied either by themselves or in conjunction with other completion operations, such as gravel packing; preferred embodiments are chelating agent and enzyme systems in a viscoelastic surfactant (VES) matrix.

Claims (49)

1. A well completion fluid for breaking filtercake comprising VES and an enzyme.
2. The well completion fluid of Claim 1 wherein said enzyme is selected from the group consisting of .alpha.-amylase and .beta.-amylase.
3. The well completion fluid of Claim 2 wherein said VES is N-cis-13-docosenoic-N,N bis(2-hydroxymethyl)-N-methyl ammonium chloride.
4. The well completion fluid of Claim 2 wherein said .alpha.-amylase is present in said fluid at a concentration of between about 0.05 and about 1.5 %.
5. The well completion fluid of Claim 4 wherein said .alpha.-amylase is present in said fluid at a concentration of about 0.5%.
6. The well completion fluid of Claim 5 wherein said VES is present in said fluid at a concentration of between about 0.5 and about 7%.
7. The well completion fluid of Claim 6 wherein said VES is present in said fluid at a concentration of about 5%.
8. The well completion fluid of Claim 7 further comprising a salt selected from the group consisting of 4% KCl and 3% NH4Cl.
9. The well completion fluid of Claim 8 wherein said salt is NH4Cl.
10. The well completion fluid of Claim 8 further comprising iso-propanol wherein said iso-propanol and said VES are present in said fluid in a ratio of about 1:4.
11. The well completion fluid of Claim 3 further comprising a chelating agent.
12. The well completion fluid of Claim 11 wherein said chelating agent is selected from the group consisting of HEDP, ATMP, TTPMP, EDTA, CDTA, DTPA, and NTA.
13. The well completion fluid of Claim 12 wherein said chelating agent is EDTA.
14. The well completion fluid of Claim 13 wherein said EDTA is present in said fluid at a concentration of about 28%.
15. The well completion fluid of Claim 14 wherein said .alpha.-amylase, said VES, and said EDTA are present in said fluid at concentrations of about 0.5%, 5%, and 28%, respectively.
16.A well completion fluid for breaking filtercake comprising an acid and VES.
17. The well completion fluid of Claim 16 wherein said acid is formic acid.
18. The well completion fluid of Claim 17 wherein said VES is N-cis-13 docosenoic-N,N bis(2-hydroxymethyl)-N-methyl ammonium chloride.
19.The well completion fluid of Claim 16 wherein said formic acid is present in said fluid at a concentration of between about 3 and about 7%.
20. The well completion fluid of Claim 16 further comprising a corrosion inhibitor.
21. The well completion fluid of Claim 16 further comprising a salt selected from the group consisting of KCl and NH4Cl.
22. The well completion fluid of Claim 20 wherein said salt is present in said solution at a concentration of between about 1 and about 5%.
23. The well completion fluid of Claim 18 wherein said VES is present in said fluid at a concentration of between about 3 and about 7%.
24. The well completion fluid of Claim 21 wherein said VES, said NH4Cl, and said formic acid, are each present in said fluid at concentrations of about 4%.
25. A well completion fluid for breaking filtercake comprising a chelating agent.
26. The well completion fluid of Claim 25 further comprising a VES.
27. The well completion fluid of Claim 26 wherein said VES is VES is N-cis-13-docosenoic-N,N-bis(2-hydroxymethyl)-N-methyl ammonium chloride.
28. The well completion fluid of Claim 25 wherein said chelating agent is selected from the group consisting of HEDP, ATMP, TTPMP, EDTA, CDTA, DTPA, and NTA.
29.The well completion fluid of Claim 28 wherein said chelating agent is EDTA.
30. The well completion fluid of Claim 29 wherein said EDTA is present in said fluid at a concentration of about 28%.
31. The well completion fluid of Claim 2 wherein said EDTA is present in said fluid at a concentration of about 28%.
32. The well completion fluid of Claim 25 further comprising .alpha.-amylase.
33.The well completion fluid of Claim 32 wherein said .alpha.-amylase is present in said fluid at a concentration of between about 0.05 and about 1.0%.
34. The well completion fluid of Claim 33 wherein said .alpha.-amylase is present in said fluid at a concentration of about 0.5%.
35.The well completion fluid of Claim 34 further comprising a salt selected from the group consisting of KCl and NH4Cl, and wherein said salt is present in said fluid at a concentration of between about 3 and about 5%.
36.A method for breaking filtercake in conjunction with a gravel pack operation comprising circulating through a well, the fluid as in any of Claims 1-35.
37. A method for breaking filtercake in conjunction with a gravel pack operation comprising injecting into a well, the fluid as in any of Claims 1-35.
38. The method of Claim 36 further comprising the step of first injecting into said well, a pre-wash fluid.
39.The method of Claim 38 wherein said pre-wash fluid consists essentially of an anionic surfactant solution.
40.A single-stage soak method for breaking filtercake comprising injecting into a wellbore the fluid as in any of Claims 1-35, and allowing said fluid to contact said wellbore.
41. A method for breaking filtercake comprising injecting into a wellbore then circulating through said wellbore, the fluid as in any of Claims 1-35.
42. The method of Claim 40 further comprising the step of first injecting into said well, a pre-wash fluid.
43. The method of Claim 41 further comprising the step of first injecting and circulating into said well, a pre-wash fluid.
44. The method of Claim 40 wherein said completion fluid is allowed to contact said wellbore for between about 24 and about 128 hours.
45.A well completion fluid for breaking filtercake comprising VES, .alpha.-amylase, and EDTA, present in said fluid in about the following concentrations: 5%, 0.5%, and 28%, respectively.
46.The well completion fluid of Claim 45 further comprising NH4Cl, having a concentration in said fluid of about 4%.
47.A well completion fluid for breaking filtercake comprising .alpha.-amylase and EDTA, wherein said .alpha.-amylase is present in said fluid at a concentration of between about 0.1% and about 1.5%, and wherein said EDTA is present in said fluid at a concentration of between about 5%
and about 28%.
48.The well completion fluid of Claim 46 further comprising between about 1% and about 10% of a salt.
49.A method for breaking filtercake in conjunction with a gravel pack operation comprising injecting into a well, the fluid as in any of Claims 45-48.
CA2356332A 1998-12-31 1999-12-08 Fluids and techniques for hydrocarbon well completion Expired - Fee Related CA2356332C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2690140A CA2690140C (en) 1998-12-31 1999-12-08 Fluids and techniques for hydrocarbon well completion

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/224,440 US6140277A (en) 1998-12-31 1998-12-31 Fluids and techniques for hydrocarbon well completion
US09/224,440 1998-12-31
PCT/US1999/029011 WO2000040667A1 (en) 1998-12-31 1999-12-08 Fluids and techniques for hydrocarbon well completion

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2690140A Division CA2690140C (en) 1998-12-31 1999-12-08 Fluids and techniques for hydrocarbon well completion

Publications (2)

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CA2356332A1 true CA2356332A1 (en) 2000-07-13
CA2356332C CA2356332C (en) 2010-03-23

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CA2690140A Expired - Fee Related CA2690140C (en) 1998-12-31 1999-12-08 Fluids and techniques for hydrocarbon well completion

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Country Status (12)

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US (3) US6140277A (en)
EP (1) EP1171543B1 (en)
CN (1) CN1238463C (en)
AT (1) ATE550403T1 (en)
AU (1) AU761262B2 (en)
BR (1) BR9916631B1 (en)
CA (2) CA2356332C (en)
EA (1) EA002585B1 (en)
ID (1) ID30082A (en)
NO (1) NO339337B1 (en)
OA (1) OA12508A (en)
WO (1) WO2000040667A1 (en)

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