WO2005033473A1 - System and method for correcting errors in depth for measurements made while drilling - Google Patents
System and method for correcting errors in depth for measurements made while drilling Download PDFInfo
- Publication number
- WO2005033473A1 WO2005033473A1 PCT/GB2004/004123 GB2004004123W WO2005033473A1 WO 2005033473 A1 WO2005033473 A1 WO 2005033473A1 GB 2004004123 W GB2004004123 W GB 2004004123W WO 2005033473 A1 WO2005033473 A1 WO 2005033473A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drillstring
- depth
- wellbore
- hookload
- corrections
- Prior art date
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 title claims abstract description 10
- 238000012937 correction Methods 0.000 claims abstract description 13
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 5
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 5
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 5
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
Definitions
- the present invention relates to the field of measurements made during the drilling phase of a hydrocarbon borehole.
- the invention relates to an automated method for correcting errors in depth for such measurements .
- the length of the drillstring in the borehole is used to estimate the measured depth (or along hole length) of a borehole, it is assumed that the pipe is inelastic and therefore does not stretch.
- discrepancies in the length of the borehole estimated at surface during rig operations and the actual length of the borehole there may cause gaps or lost data, when the uncorrected depth is used with logs of data measured during with sensors mounted on the drillstring, such as LWD and MWD logs .
- a method for automatically correcting for depth errors in measurements taken from a drillstring comprising the steps of receiving data representing measurements taken in a hydrocarbon wellbore at a plurality of depths within the wellbore from at least one sensor located on a drillstring used to drill the wellbore, automatically calculating corrections for errors in the depth of the locations, and making use of the measured data having the depths corrected.
- Figure 1 shows a scheme for correcting depth for measurements made from a drillstring according to a preferred embodiment of the invention
- Figure 2 shows an example of data prior to correction according to a preferred embodiment of the invention
- Figure 3 shows data that has been corrected according to a preferred embodiment of the invention.
- the length of the drillstring in the borehole is used to estimate the measured depth (or along hole lengt T of a borehole.
- the depth is corrected.
- Thelength of the drillpipe is a function of several parameters including temperature, pressure, and stress.
- corrections are calculated based on at least the stress on the drillstring.
- a correction is calculated based on the un- deformed length of the drillstring and the stress due to the buoyant drillstring weight, weight on bit and frictional forces due to contact with the borehole acting along the length of the drillstring. Two of these parameters, friction factor and weight on bit vary depending on the rig operation and the drillers input at surface.
- Figure 1 shows a scheme for correcting depth for measurements made from a drillstring according to a preferred embodiment of the invention. According to a preferred embodiment of the invention the following steps are undertaken for each time step:
- Weight on bit is either estimated from the hookload and total hookload or from weight on bit measured downhole. 7) From these inputs the model is used to compute the hookload. If the hookload is within tolerances equal to the measured hookload the stress profile is accepted and used to compute the pipe stretch. If it is not then the friction factor or the weight on bit are varied until the hookload and the calculated hookloads match.
- the models used here and in step 4 above preferably known models such as DrillsafeTM.
- Pipe stretch is then computed using the stress profile. 9) The stretch correction is applied to measured depth to give the corrected depth and time stamped. 10) Time stamped downhole data is the- associated with the corrected surface measured depths with the same time stamp.
- Figure 2 shows an example of data prior to correction according to a preferred embodiment of the invention.
- the first frame of Figure 2 shows a surface time verse depth plot, the first section is drilling without surface rotation.
- all of the friction force is opposing the motion of the drillsting along the hole.
- the driller stops drill pulls the drillstring off bottom and then runs back to bottom rotating the drillstring, when rotating the friction force opposes the direction of rotation and as a result the frictional force along the borehole falls to close to zero.
Landscapes
- Geology (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Earth Drilling (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Testing Of Balance (AREA)
- Drilling And Boring (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2540648A CA2540648C (en) | 2003-10-01 | 2004-09-28 | System and method for correcting errors in depth for measurements made while drilling |
US10/573,236 US8181510B2 (en) | 2002-12-27 | 2004-09-28 | System and method for correcting errors in depth for measurements made while drilling |
NO20061563A NO20061563L (en) | 2003-10-01 | 2006-04-06 | System and method for correcting depth errors in paints performed during drilling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0322966.3 | 2003-10-01 | ||
GB0322966A GB2396697A (en) | 2002-12-27 | 2003-10-01 | Depth correction of drillstring measurements |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005033473A1 true WO2005033473A1 (en) | 2005-04-14 |
Family
ID=34400954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2004/004123 WO2005033473A1 (en) | 2002-12-27 | 2004-09-28 | System and method for correcting errors in depth for measurements made while drilling |
Country Status (3)
Country | Link |
---|---|
CA (1) | CA2540648C (en) |
NO (1) | NO20061563L (en) |
WO (1) | WO2005033473A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009085812A2 (en) * | 2007-12-21 | 2009-07-09 | Schlumberger Canada Limited | Method and system to automatically correct lwd depth measurements |
WO2009108881A2 (en) * | 2008-02-27 | 2009-09-03 | Baker Hughes Incorporated | System and method to locate, monitor and quantify friction between a drillstring and a wellbore |
WO2009129461A2 (en) * | 2008-04-17 | 2009-10-22 | Baker Hughes Incorporated | System and method for improved depth measurement correction |
US7823658B2 (en) | 2008-05-09 | 2010-11-02 | Baker Hughes Incorporated | Analyzing resistivity images for determining downhole events and removing image artifacts |
WO2011059555A3 (en) * | 2009-10-30 | 2011-07-07 | Intelliserv International Holding, Ltd. | System and method for determining stretch or compression of a drill string |
US8442769B2 (en) | 2007-11-12 | 2013-05-14 | Schlumberger Technology Corporation | Method of determining and utilizing high fidelity wellbore trajectory |
EP3004539A4 (en) * | 2013-05-30 | 2017-04-26 | Services Pétroliers Schlumberger | Determining correct drill pipe length and formation depth using measurements from repeater subs of a wired drill pipe system |
WO2018154264A1 (en) * | 2017-02-22 | 2018-08-30 | Driller's Way-Point Depth Limited | A method for determining well depth |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0274207A1 (en) * | 1986-12-10 | 1988-07-13 | Services Petroliers Schlumberger | Method for monitoring the operations of the rotary drilling of a well |
US4852052A (en) * | 1987-05-28 | 1989-07-25 | Teleco Oilfield Services Inc. | Kelly-to-riser position determining system with adjustment for uncompensated heave |
EP0422706A2 (en) * | 1989-10-04 | 1991-04-17 | Anadrill International SA | System and method for monitoring drill bit depth |
EP0654687A2 (en) * | 1993-10-22 | 1995-05-24 | Baker Hughes Incorporated | A method of processing measurement while drilling data |
-
2004
- 2004-09-28 CA CA2540648A patent/CA2540648C/en not_active Expired - Fee Related
- 2004-09-28 WO PCT/GB2004/004123 patent/WO2005033473A1/en active Application Filing
-
2006
- 2006-04-06 NO NO20061563A patent/NO20061563L/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0274207A1 (en) * | 1986-12-10 | 1988-07-13 | Services Petroliers Schlumberger | Method for monitoring the operations of the rotary drilling of a well |
US4852052A (en) * | 1987-05-28 | 1989-07-25 | Teleco Oilfield Services Inc. | Kelly-to-riser position determining system with adjustment for uncompensated heave |
EP0422706A2 (en) * | 1989-10-04 | 1991-04-17 | Anadrill International SA | System and method for monitoring drill bit depth |
EP0654687A2 (en) * | 1993-10-22 | 1995-05-24 | Baker Hughes Incorporated | A method of processing measurement while drilling data |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8442769B2 (en) | 2007-11-12 | 2013-05-14 | Schlumberger Technology Corporation | Method of determining and utilizing high fidelity wellbore trajectory |
WO2009085812A3 (en) * | 2007-12-21 | 2009-10-08 | Schlumberger Canada Limited | Method and system to automatically correct lwd depth measurements |
WO2009085812A2 (en) * | 2007-12-21 | 2009-07-09 | Schlumberger Canada Limited | Method and system to automatically correct lwd depth measurements |
US8121788B2 (en) | 2007-12-21 | 2012-02-21 | Schlumberger Technology Corporation | Method and system to automatically correct LWD depth measurements |
WO2009108881A2 (en) * | 2008-02-27 | 2009-09-03 | Baker Hughes Incorporated | System and method to locate, monitor and quantify friction between a drillstring and a wellbore |
WO2009108881A3 (en) * | 2008-02-27 | 2009-12-03 | Baker Hughes Incorporated | System and method to locate, monitor and quantify friction between a drillstring and a wellbore |
GB2470329A (en) * | 2008-02-27 | 2010-11-17 | Baker Hughes Inc | System and method to locate, monitor and quantify friction between a drillstring and a wellbore |
GB2470329B (en) * | 2008-02-27 | 2012-06-13 | Baker Hughes Inc | System and method to locate, monitor and quantify friction between a drillstring and a wellbore |
WO2009129461A2 (en) * | 2008-04-17 | 2009-10-22 | Baker Hughes Incorporated | System and method for improved depth measurement correction |
WO2009129461A3 (en) * | 2008-04-17 | 2010-02-11 | Baker Hughes Incorporated | System and method for improved depth measurement correction |
US8042624B2 (en) | 2008-04-17 | 2011-10-25 | Baker Hughes Incorporated | System and method for improved depth measurement correction |
US7823658B2 (en) | 2008-05-09 | 2010-11-02 | Baker Hughes Incorporated | Analyzing resistivity images for determining downhole events and removing image artifacts |
WO2011059555A3 (en) * | 2009-10-30 | 2011-07-07 | Intelliserv International Holding, Ltd. | System and method for determining stretch or compression of a drill string |
US8362915B2 (en) | 2009-10-30 | 2013-01-29 | Intelliserv, Llc | System and method for determining stretch or compression of a drill string |
EP3004539A4 (en) * | 2013-05-30 | 2017-04-26 | Services Pétroliers Schlumberger | Determining correct drill pipe length and formation depth using measurements from repeater subs of a wired drill pipe system |
WO2018154264A1 (en) * | 2017-02-22 | 2018-08-30 | Driller's Way-Point Depth Limited | A method for determining well depth |
US11174723B2 (en) | 2017-02-22 | 2021-11-16 | Driller's Way-Point Depth Limited | Method for determining well depth |
EP3585980B1 (en) * | 2017-02-22 | 2023-03-22 | Driller's Way-Point Depth Limited | A method for determining well depth |
Also Published As
Publication number | Publication date |
---|---|
NO20061563L (en) | 2006-04-28 |
CA2540648A1 (en) | 2005-04-14 |
CA2540648C (en) | 2012-10-30 |
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