CA2475359A1 - Methods of discovering and correcting subterranean formation integrity problems during drilling - Google Patents
Methods of discovering and correcting subterranean formation integrity problems during drilling Download PDFInfo
- Publication number
- CA2475359A1 CA2475359A1 CA002475359A CA2475359A CA2475359A1 CA 2475359 A1 CA2475359 A1 CA 2475359A1 CA 002475359 A CA002475359 A CA 002475359A CA 2475359 A CA2475359 A CA 2475359A CA 2475359 A1 CA2475359 A1 CA 2475359A1
- Authority
- CA
- Canada
- Prior art keywords
- well bore
- interval
- drilled
- fluid
- bore interval
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract 22
- 230000015572 biosynthetic process Effects 0.000 title claims abstract 18
- 238000005553 drilling Methods 0.000 title claims 6
- 239000012530 fluid Substances 0.000 claims abstract 46
- 238000007789 sealing Methods 0.000 claims abstract 19
- 239000000203 mixture Substances 0.000 claims abstract 15
- 239000004927 clay Substances 0.000 claims 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 4
- 229920000642 polymer Polymers 0.000 claims 4
- 230000007423 decrease Effects 0.000 claims 2
- 230000002706 hydrostatic effect Effects 0.000 claims 2
- 229920000126 latex Polymers 0.000 claims 2
- 238000005086 pumping Methods 0.000 claims 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims 2
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/003—Means for stopping loss of drilling fluid
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
Abstract
In accordance with a method of this invention, formation integrity problems are discovered, diagnosed and corrected in successively drilled subterranean well bore intervals. If one or more of well bore fluid outflows, formation fluid inflows or inadequate well bore pressure containment integrity are discovered in a drilled well bore interval, well logs are run and other relevant well bore data is collected in the drilled well bore interval and analyzed to provide a specific treatment using a specific pumpable sealing composition for sealing and increasing the pressure containment integrity of the well bore. Thereafter, the sealing composition is pumped into the drille d well bore interval whereby the well bore interval is sealed or the pressure containment integrity is increased, or both.
Claims (20)
1. A method of discovering, diagnosing and correcting formation integrity problems in successively drilled subterranean well bore intervals comprising the steps of:
(a) determining if well bore fluid is being lost from each drilled well bore interval or if pressurized formation fluid is flowing into each well bore interval, or both;
(b) determining the pressure containment integrity of each well bore interval;
(c) if it is determined that well bore fluid is being lost from a well bore interval or pressurized formation fluid is flowing into said well bore interval, or both, in step (a) or if it is determined that said pressure containment integrity is inadequate in step (b), providing a pumpable sealing composition for sealing said drilled well bore interval to prevent well bore fluid outflow therefrom, to prevent pressurized formation fluid inflow thereinto or to increase the pressure containment integrity of said drilled well bore interval; and (d) pumping said sealing composition into said drilled well bore interval to cause said drilled well bore interval to be sealed or the pressure containment integrity of said drilled well bore interval to be increased, or both.
(a) determining if well bore fluid is being lost from each drilled well bore interval or if pressurized formation fluid is flowing into each well bore interval, or both;
(b) determining the pressure containment integrity of each well bore interval;
(c) if it is determined that well bore fluid is being lost from a well bore interval or pressurized formation fluid is flowing into said well bore interval, or both, in step (a) or if it is determined that said pressure containment integrity is inadequate in step (b), providing a pumpable sealing composition for sealing said drilled well bore interval to prevent well bore fluid outflow therefrom, to prevent pressurized formation fluid inflow thereinto or to increase the pressure containment integrity of said drilled well bore interval; and (d) pumping said sealing composition into said drilled well bore interval to cause said drilled well bore interval to be sealed or the pressure containment integrity of said drilled well bore interval to be increased, or both.
2. The method of claim 1 wherein step (a) comprises circulating a well bore fluid through said drilled well bore interval for a period of time sufficient to determine if the quantity of said well bore fluid being circulated decreases due to well bore fluid outflow from said drilled well bore interval or increases due to pressurized formation fluid inflow into said drilled well bore interval.
3. The method of claim 2 wherein said well bore fluid is drilling fluid.
4. The method of claim 1 wherein if it is determined that well bore fluid outflow from said drilled well bore interval is occurring or pressurized formation fluid inflow into said drilled well bore interval is occurring, or both, step (a) further comprises analyzing well logs and other relevant well bore data collected in said drilled well bore interval to diagnose the cause and extent of said well bore fluid outflow or formation fluid inflow, or both.
5. The method of claim 1 wherein step (b) comprises increasing the density of or pressure exerted on a well bore fluid in said drilled well bore interval to an equivalent well bore fluid weight greater than or equal to the maximum hydrostatic pressure and friction pressure level to be exerted in said drilled well bore interval to determine if leak off occurs and the pressure containment integrity of said drilled well bore interval is inadequate.
6. The method of claim 5 wherein said well bore fluid is drilling fluid.
7. The method of claim 5 wherein if the pressure containment integrity is inadequate, step (b) further comprises analyzing well logs and other relevant well bore data collected in said drilled well bore interval to diagnose the cause and extent of said inadequate pressure integrity containment.
8. The method of claim 1 wherein when a pumpable sealing composition is provided in step (c), the pumpable sealing composition has the properties of rapidly converting into high viscosity sealing masses upon commingling and reacting with well bore fluids which are diverted into, seal and strengthen weak zones and openings in the drilled well bore interval through which well bore fluid outflows or pressurized formation fluid inflows into said drilled well bore interval.
9. The method of claim 1 wherein said pumpable sealing composition reacts with water in said drilled well bore interval and is comprised of oil, a hydratable polymer, an organophillic clay and a water swellable clay.
10. The method of claim 1 wherein said pumpable sealing composition reacts with oil in said drilled well bore interval and is comprised of water, an aqueous rubber latex, an organophillic clay, sodium carbonate and a hydratable polymer.
11. A method of discovering, diagnosing and correcting formation integrity problems in successively drilled subterranean well bore intervals comprising the steps of (a) drilling a first well bore interval;
(b) determining if well bore fluid is outflowing from said first drilled well bore interval or if pressurized formation fluid is inflowing into said first drilled well bore interval;
(b) determining if well bore fluid is outflowing from said first drilled well bore interval or if pressurized formation fluid is inflowing into said first drilled well bore interval;
12 (c) determining the pressure containment integrity of said first drilled well bore interval;
(d) if it is determined that well bore fluid is outflowing or pressurized formation fluid is inflowing into said first drilled well bore interval in step (b) or if it is determined that said pressure containment integrity is inadequate in said first drilled well bore interval in step (c), or both, performing the additional steps of:
(1) running well bore logs and collecting other relevant well bore data in said first well bore interval in real time, (2) transmitting all real time data collected to a location where a specific treatment using a specific pumpable sealing composition is determined, (3) providing said specific pumpable sealing composition at said well site, and (4) performing said specific treatment including pumping said sealing composition into said first drilled well bore interval to cause said first drilled well bore interval to be sealed or the pressure containment integrity to be increased, or both; and (e) repeating steps (a), (b), (c) and (d) for each additional drilled well bore interval until the total well bore depth is reached.
12. The method of claim 11 wherein step (b) comprises circulating a well bore fluid through said drilled well bore interval for a period of time sufficient to determine if the quantity of said well bore fluid being circulated decreases due to well bore fluid outflow from said drilled well bore interval or increases due to pressurized formation fluid inflow into said drilled well bore interval.
(d) if it is determined that well bore fluid is outflowing or pressurized formation fluid is inflowing into said first drilled well bore interval in step (b) or if it is determined that said pressure containment integrity is inadequate in said first drilled well bore interval in step (c), or both, performing the additional steps of:
(1) running well bore logs and collecting other relevant well bore data in said first well bore interval in real time, (2) transmitting all real time data collected to a location where a specific treatment using a specific pumpable sealing composition is determined, (3) providing said specific pumpable sealing composition at said well site, and (4) performing said specific treatment including pumping said sealing composition into said first drilled well bore interval to cause said first drilled well bore interval to be sealed or the pressure containment integrity to be increased, or both; and (e) repeating steps (a), (b), (c) and (d) for each additional drilled well bore interval until the total well bore depth is reached.
12. The method of claim 11 wherein step (b) comprises circulating a well bore fluid through said drilled well bore interval for a period of time sufficient to determine if the quantity of said well bore fluid being circulated decreases due to well bore fluid outflow from said drilled well bore interval or increases due to pressurized formation fluid inflow into said drilled well bore interval.
13. The method of claim 12 wherein said well bore fluid is drilling fluid.
14. The method of claim 11 wherein if it is determined that well bore fluid outflow from said drilled well bore interval is occurring or pressurized formation fluid inflow into said drilled well bore interval is occurring, or both, step (b) further comprises analyzing well logs and other relevant well bore data collected in said drilled well bore interval to diagnose the cause and extent of said well bore fluid outflow or formation fluid inflow, or both.
15. The method of claim 11 wherein step (c) comprises increasing the density of or pressure exerted on a well bore fluid in said drilled well bore interval to an equivalent well bore fluid weight greater than or equal to the maximum hydrostatic pressure and friction pressure level to be exerted in said drilled well bore interval to determine if the pressure containment integrity of said drilled well bore interval is inadequate.
16. The method of claim 15 wherein said well bore fluid is drilling fluid.
17. The method of claim 15 wherein if the pressure containment integrity is inadequate, step (c) further comprises analyzing well logs and other relevant well bore data collected in said drilled well bore interval to diagnose the cause and extent of said inadequate pressure integrity containment.
18. The method of claim 11 wherein when a pumpable sealing composition is provided in accordance with step (d)(3), the pumpable sealing composition has the properties of rapidly converting into high viscosity sealing masses upon commingling and reacting with well bore fluids which are diverted into, seal and strengthen weak zones and openings in the drilled well bore interval through which well bore fluid outflows or pressurized formation fluid inflows into said drilled well bore interval.
19. The method of claim 11 wherein said pumpable sealing composition reacts with water in said drilled well bore interval and is comprised of oil, a hydratable polymer, an organophillic clay and a water swellable clay.
20. The method of claim 11 wherein said pumpable sealing composition reacts with oil in said drilled well bore interval and is comprised of water, an aqueous rubber latex, an organophillic clay, sodium carbonate and a hydratable polymer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/082,459 | 2002-02-25 | ||
| US10/082,459 US6926081B2 (en) | 2002-02-25 | 2002-02-25 | Methods of discovering and correcting subterranean formation integrity problems during drilling |
| PCT/GB2003/000775 WO2003071090A1 (en) | 2002-02-25 | 2003-02-21 | Methods of discovering and correcting subterranean formation integrity problems during drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2475359A1 true CA2475359A1 (en) | 2003-08-28 |
| CA2475359C CA2475359C (en) | 2011-04-26 |
Family
ID=27753099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2475359A Expired - Fee Related CA2475359C (en) | 2002-02-25 | 2003-02-21 | Methods of discovering and correcting subterranean formation integrity problems during drilling |
Country Status (10)
| Country | Link |
|---|---|
| US (5) | US6926081B2 (en) |
| EP (1) | EP1481147B1 (en) |
| AR (1) | AR038447A1 (en) |
| AU (1) | AU2003208440B2 (en) |
| BR (1) | BR0307940B1 (en) |
| CA (1) | CA2475359C (en) |
| DE (1) | DE60303592D1 (en) |
| MX (1) | MXPA04008154A (en) |
| NO (1) | NO327365B1 (en) |
| WO (1) | WO2003071090A1 (en) |
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2002
- 2002-02-25 US US10/082,459 patent/US6926081B2/en not_active Expired - Lifetime
-
2003
- 2003-01-24 US US10/350,429 patent/US7213645B2/en not_active Expired - Lifetime
- 2003-02-21 CA CA2475359A patent/CA2475359C/en not_active Expired - Fee Related
- 2003-02-21 WO PCT/GB2003/000775 patent/WO2003071090A1/en not_active Application Discontinuation
- 2003-02-21 AR ARP030100568A patent/AR038447A1/en active IP Right Grant
- 2003-02-21 DE DE60303592T patent/DE60303592D1/en not_active Expired - Fee Related
- 2003-02-21 EP EP03706728A patent/EP1481147B1/en not_active Expired - Fee Related
- 2003-02-21 BR BRPI0307940-6A patent/BR0307940B1/en not_active IP Right Cessation
- 2003-02-21 AU AU2003208440A patent/AU2003208440B2/en not_active Ceased
- 2003-02-21 MX MXPA04008154A patent/MXPA04008154A/en active IP Right Grant
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2004
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- 2006-05-04 US US11/429,111 patent/US7314082B2/en not_active Expired - Lifetime
- 2006-05-04 US US11/430,305 patent/US7311147B2/en not_active Expired - Lifetime
- 2006-05-04 US US11/429,632 patent/US7308936B2/en not_active Expired - Lifetime
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| US20030181338A1 (en) | 2003-09-25 |
| EP1481147A1 (en) | 2004-12-01 |
| US20030162670A1 (en) | 2003-08-28 |
| DE60303592D1 (en) | 2006-04-20 |
| US20060266107A1 (en) | 2006-11-30 |
| US6926081B2 (en) | 2005-08-09 |
| WO2003071090A1 (en) | 2003-08-28 |
| MXPA04008154A (en) | 2004-11-26 |
| AR038447A1 (en) | 2005-01-12 |
| EP1481147B1 (en) | 2006-02-15 |
| US7311147B2 (en) | 2007-12-25 |
| US7314082B2 (en) | 2008-01-01 |
| AU2003208440A1 (en) | 2003-09-09 |
| US7308936B2 (en) | 2007-12-18 |
| US20060266519A1 (en) | 2006-11-30 |
| US20060272860A1 (en) | 2006-12-07 |
| NO327365B1 (en) | 2009-06-15 |
| BR0307940A (en) | 2004-12-21 |
| AU2003208440B2 (en) | 2007-02-08 |
| US7213645B2 (en) | 2007-05-08 |
| NO20043607L (en) | 2004-08-30 |
| BR0307940B1 (en) | 2014-02-18 |
| CA2475359C (en) | 2011-04-26 |
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