Geometrical Imperfections

Geometrical Imperfections

Definition(s)

Geometrical Imperfections

Geometrical imperfections are defined as axial misalignment, angular distortion, excessive weld reinforcement and otherwise poor weld shapes. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  
WCT-BOP

WCT-BOP

Definition(s)

WCT-BOP

Wireline/coiled tubing BOP. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  

WCT-BOP

Wireline/coil tubing blowout preventer (see ISO 13628-7). Source: API SPEC 17D, Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment, Upstream Segment, Second Edition May 2011 (Errata September 2011). Global Standards
RAO

RAO

Definition(s)

RAO

Ratio of a vessel’s motion to the wave amplitude causing that motion and presented over a wide range of wave periods.

Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards

RAO

Relationship between wave surface elevation amplitude at a reference location and the vessel response amplitude, and the phase lag between the two. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards

RAO

See Response Amplitude Operator. Source: API RP 16Q, Recommended Practice for Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems, First Edition, November 1993 (Reaffirmed August 2001). Global Standards Source: Deepwater Well Control Guidelines. IADC Guidelines  

RAO

Response Amplitude Operator. Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards Source: API SPEC 17J, Specification for Unbonded Flexible Pipe, Third Edition, July 2008. Global Standards Source: ISO 19901-7:2013, Petroleum and natural gas industries – Specific requirements for offshore structures – Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units. Global Standards Source: ISO 13624-1:2009, Petroleum and natural gas industries – Drilling and production equipment – Part 1:Design and operation of marine drilling riser equipment. Global Standards  

RAO (regular waves)

Ratio of a vessel's motion to the wave amplitude causing that motion and presented over a range of wave periods. Source: ISO 13624-1:2009, Petroleum and natural gas industries – Drilling and production equipment – Part 1:Design and operation of marine drilling riser equipment. Global Standards
OOR

OOR

Definition(s)

OOR

Out of roundness. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
MPI

MPI

Definition(s)

MPI

Magnetic particle inspection. Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards Source: NORSOK D-010, Well integrity in drilling and well operations, Rev. 3, August 2004. Global Standards Source: Oil & Gas UK, Guidelines on subsea BOP systems, Issue 1, July 2012, Global Standards Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
GPS

GPS

Definition(s)

GPS

Global positioning system. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  

GPS

Global positioning satellite. Source: Deepwater Well Control Guidelines. IADC Guidelines  

GPS

“GPS” means global positioning system, which is a global satellite-based system for determining precise location on Earth. Source: Division of Mineral Resources Management - Oil and Gas, Ohio Administrative Code, Chapter 1501:9, January 2012. Regulations
Survey Acquisition Data

Survey Acquisition Data

Definition(s)

Survey acquisition data

Survey acquisition data means:
  1. for a seismic survey — each type of data mentioned in an item in Part 1 of Schedule 3:
    1. presented on a medium and in a format specified in the item; or
    2. presented on another medium or in another format that the Titles Administrator has authorised the petroleum titleholder to use; or
  2. for any other type of survey — each type of data mentioned in an item in Part 2 of Schedule 3 and presented in accordance with subparagraph (a) (i) or (ii).
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations  

Survey acquisition data

Survey acquisition data means:
  1. for a seismic survey — each type of data mentioned in an item in Part 1 of Schedule 3:
    1. presented on a medium and in a format specified in the item; or
    2. presented on another medium or in another format that the Titles Administrator has authorised the greenhouse gas titleholder to use; or
  2. for any other type of survey — each type of data mentioned in an item in Part 2 of Schedule 3 and presented in accordance with subparagraph (a) (i) or (ii).
 
Week of the Survey

Week of the Survey

Definition(s)

Week of the survey

Week of the survey means:
  1. the week starting on the first day of data acquisition; and
  2. each subsequent week.
Note: Notice of a geophysical or geological survey is required under regulation 12.07, and the survey will also require approval as an activity under the Offshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2009. Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations  
Weekly Survey Report

Weekly Survey Report

Definition(s)

Weekly survey report

Weekly survey report means a report that includes:
  1. the name of the survey; and
  2. the title under which the survey is being conducted; and
  3. the name of the titleholder; and
  4. the name of the contractor conducting the survey; and
  5. the name of the vessel or aircraft conducting the survey; and
  6. a map showing where the survey was conducted during the week; and
  7. the number of kilometres or square kilometres for which data was acquired during the week; and
  8. the number of points at which data was acquired during the week; and
  9. the number of lines of data acquired during the week; and
  10. the amount of downtime during the week due to equipment problems, bad weather or other circumstances; and
  11. the percentage of the survey completed at the end of the week.
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations  
Final Well Completion Report

Final Well Completion Report

Definition(s)

Final well completion report

Final well completion report means a report that includes all of the information listed in subregulation (3). (Subregualtion 3) For the definition of final well completion report in subregulation (2), the information required is in the following table.
  1. The name of the well
  2. The name of the title area in which the well is located
  3. The location of the well, in the form of:
    1. latitude and longitude; and
    2. map sheet name and graticular block number; and
    3. seismic line location and shotpoint number; and
  4. If the well is a sidetrack — the name of the parent well
  5. The names of the rig contractor and rig operator
  6. The name of the rig drilling the well
  7. The rig’s make and model
  8. The names of the contractors for:
    1. cementing; and
    2. wireline logging; and
    3. measurements while drilling (MWD); and
    4. logging while drilling (LWD); and
    5. (e) mudlogging
  9. The purpose of the well (for example development, appraisal, exploration or stratigraphy)
  10. The outcome of the well operation (for example completion of the well as a producer, suspension or abandonment)
  11. Raw pressure-time listings for any formation fluid sample tests and production tests
  12. The spud date
  13. The rig release date
  14. What is being used as the depth reference for the well (for example the Kelly bushing or the rig floor)
  15. The height of the depth reference above sea level
  16. The water depth at the well
  17. The measured depth of the well
  18. The true vertical depth of the well
  19. If applicable, the depth of perforation in the petroleum reservoir
  20. The date on which the total depth was reached
  21. If the well is deviated or horizontal:
    1. the surveyed path of the well; and
    2. the coordinates of the bottom of the well bore; and
    3. if applicable, the coordinates and true vertical depth of the intersection of the well with the reservoir horizon
  22. Particulars of equipment and casing installed on or in the well, including schematics
  23. Bit records
  24. Drilling fluids used
  25. Drilling fluid losses
  26. List of cores, cuttings and samples taken, and their depths and intervals
  27. List of logs acquired
  28. Details of any hydrocarbon indications
  29. The measured depth and true vertical depth of marker horizons or formation tops
  30. Geological interpretations of the observations made as a result of drilling the well, including:
    1. lithology; and
    2. stratigraphy; and
    3. reservoir properties and quality; and
    4. geochemistry of source rocks if available; and
    5. environment of deposition if available
  31. Wireline formation test results
  32. Production test results
  33. Core analysis
  34. If the well is an exploration well — the relevance of the observations and interpretations to the evaluation of the hydrocarbon potential of the area.
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations
EN

EN

Definition(s)

EN

European Standard. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  
CTOD

CTOD

Definition(s)

CTOD

Crack tip opening displacement. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards  

CTOD

Measure of crack severity which can be compared against a critical value at the onset of failure. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards    
Work

Work

Definition(s)

Work

All activities to be performed within relevant contract(s) issued by designer, owner, operator, contractor, fabricator or manufacturer. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  

Work

Force applied through a distance. Source: IADC UBO / MPD Glossary, December 2011. Global Standards  

Work

Work has the meaning given by clause 3 of Schedule 3 to the Act. Source: Offshore Petroleum and Greenhouse Gas Storage (Safety) Regulations 2009 (Select Legislative Instrument 2009 No. 382 as amended), Australia, prepared on 1 January 2012. Regulations  

Work

Work means work offshore that is directly or indirectly related to the construction, installation, operation, maintenance or decommissioning of a facility. Source: Offshore Petroleum and Greenhouse Gas Storage Act 2006, Australia, amended 2012. Legislation
Final Well Completion Data

Final Well Completion Data

Definition(s)

Final well completion data

Final well completion data means each type of data mentioned in Schedule 2:
  1. presented on a medium and in a format specified in the item; or
  2. presented on another medium or in another format that the Titles Administrator has authorised the petroleum titleholder to use.
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations  

Final well completion data

Final well completion data means each type of data mentioned in Schedule 2:
  1. presented on a medium and in a format specified in the item; or
  2. presented on another medium or in another format that the Titles Administrator has authorised the greenhouse gas titleholder to use.
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations
Initial Well Completion Report

Initial Well Completion Report

Definition(s)

Initial well completion report

Initial well completion report means a report that includes all of the information listed in subregulation (3). (Subregulation 3) For the definition of initial well completion report in subregulation (2), the information required is in the following table.
  1. The name of the well
  2. The name of the title area in which the well is located
  3. The location of the well, in the form of:
    1. latitude and longitude; and
    2. map sheet name and graticular block number; and
    3. seismic line location and shotpoint number
  4. The results of a check survey of the location of:
    1. for a subsea well — the wellhead; or
    2. in any other case — the top of the casing supporting the blow-out preventer
  5. If the well is a sidetrack — the name of the parent well
  6. The names of the rig contractor and rig operator
  7. The name of the rig drilling the well
  8. The rig’s make and model
  9. The names of the contractors for:
    1. cementing; and
    2. wireline logging; and
    3. measurements while drilling (MWD); and
    4. logging while drilling (LWD); and
    5. mudlogging
  10. Names of MWD and LWD tools used
  11. List of log runs for wireline logging and velocity surveys
  12. The purpose of the well (for example development, appraisal, exploration or stratigraphy)
  13. The outcome of the well operation (for example completion of the well as a producer, suspension or abandonment)
  14. Raw pressure-time listings for any formation fluid sample tests and production tests
  15. The spud date
  16. The rig release date
  17. What is being used as the depth reference for the well (for example the Kelly bushing or the rig floor)
  18. The height of the depth reference above sea level
  19. The water depth at the well
  20. The measured depth of the well
  21. The true vertical depth of the well
  22. If applicable, the depth of perforation in the petroleum reservoir
  23. The date on which the total depth was reached
  24. If the well is deviated or horizontal:
    1. the surveyed path of the well; and
    2. the coordinates of the bottom of the well bore; and
    3. if applicable, the coordinates and true vertical depth of the intersection of the well with the reservoir horizon
  25. Particulars of equipment and casing installed on or in the well, including schematics
  26. If applicable, information on cementing operations and schematics of abandonment
  27. Bit records
  28. Drilling fluids used
  29. Drilling fluid losses
  30. List of cores, cuttings and samples taken, and their depths and intervals.
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations
Wireline/Coiled Tubing BOP

Wireline/Coiled Tubing BOP

Definition(s)

Wireline/Coiled Tubing BOP (WCT-BOP)

Subsea BOP that attaches to the top of a subsea tree to facilitate wireline or coiled tubing intervention. NOTE WCT-BOP rams are designed to shear wireline or coiled tubing and seal the bore, in one operation. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Well Completion

Well Completion

Definition(s)

Well Completion

Well operations including tubing installation, well perforation and test production. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Wear Bushing

Wear Bushing

Definition(s)

Wear Bushing

Bushing to be installed in the rotary table, to provide a smooth lateral support to the workover riser at drill floor level. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  

Wear Bushing

Retrievable cylindrical device that protects the internal surfaces of wellhead equipment and the top of the last casing suspended. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards  

Wear Bushing

Bore protector that also protects the casing hanger below it. Source: API SPEC 17D, Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment, Upstream Segment, Second Edition May 2011 (Errata September 2011). Global Standards
Wave Frequency Motion

Wave Frequency Motion

Definition(s)

Wave Frequency Motion

Motion of the vessel at the frequencies of incident waves. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Vessel Offset

Vessel Offset

Definition(s)

Vessel Offset

Total offset of the vessel, taking into account the vessel mean offset, wave frequency motions and low-frequency wind and wave motions. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Vessel Mean Offset

Vessel Mean Offset

Definition(s)

Vessel Mean Offset

Offset created by steady forces from current, wind and waves. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Initial Well Completion Data

Initial Well Completion Data

Definition(s)

Initial well completion data

Initial well completion data means each type of data mentioned in Schedule 1:
  1. presented on a medium and in a format specified in the item; or
  2. presented on another medium or in another format that the Titles Administrator has authorised the petroleum titleholder to use.
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations  

Initial well completion data

Initial well completion data means each type of data mentioned in Schedule 1:
  1. presented on a medium and in a format specified in the item; or
  2. presented on another medium or in another format that the Titles Administrator has authorised the greenhouse gas titleholder to use initial well completion report means a report that includes all of the information listed in subregulation (3).
For the definition of initial well completion report in subregulation (2), the information required is in the following table.
  1. The name of the well
  2. The name of the title area in which the well is located
  3. The location of the well, in the form of:
    1. latitude and longitude; and
    2. map sheet name and graticular block number; and
    3. seismic line location and shotpoint number
  4. The results of a check survey of the location of:
    1. for a subsea well — the wellhead; or
    2. in any other case — the top of the casing supporting the blow-out preventer
  5. If the well is a sidetrack — the name of the parent well
  6. The names of the rig contractor and rig operator
  7. The name of the rig drilling the well
  8. The rig’s make and model
  9. The names of the contractors for:
    1. cementing; and
    2. wireline logging; and
    3. measurements while drilling (MWD); and
    4. logging while drilling (LWD); and
    5. mudlogging
  10. Names of MWD and LWD tools used
  11. List of log runs for wireline logging and velocity surveys
  12. The purpose of the well (for example development, appraisal, exploration or stratigraphy)
  13. The outcome of the well operation (for example completion of the well as an injector, suspension or abandonment)
  14. Raw pressure-time listings for any formation fluid sample tests and production tests
  15. The spud date
  16. The rig release date
  17. What is being used as the depth reference for the well (for example the Kelly bushing or the rig floor)
  18. The height of the depth reference above sea level
  19. The water depth at the well
  20. The measured depth of the well
  21. The true vertical depth of the well
  22. If applicable, the depth of perforation in the storage formation
  23. The date on which the total depth was reached
  24. If the well is deviated or horizontal:
    1. the surveyed path of the well; and
    2. the coordinates of the bottom of the well bore; and
    3. if applicable, the coordinates and true vertical depth of the intersection of the well with the storage formation
  25. Particulars of equipment and casing installed on or in the well, including schematics
  26. If applicable, information on cementing operations and schematics of abandonment
  27. Bit records
  28. Drilling fluids used
  29. Drilling fluid losses
  30. List of cores, cuttings and samples taken, and their depths and intervals.
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations
Daily Drilling Report

Daily Drilling Report

Definition(s)

Daily drilling report

Daily drilling report means a report that includes:
  1. the name of the well; and
  2. the location of the well by latitude and longitude; and
  3. the water depth at the well; and
  4. the drilled depth; and
  5. the work carried out; and
  6. the lithology of formations penetrated; and
  7. details of any indication of hydrocarbons; and
  8. a summary of the material used; and
  9. drilling fluid losses; and
  10. a leak off test summary; and
  11. the geometry of the well bore; and
  12. the results of surveys made in the well bore; and
  13. the estimated daily and cumulative well costs.
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations
Authorised Activity

Authorised Activity

Definition(s)

Authorised activity

Authorised activity means:
  1. an activity by a petroleum exploration permittee that is authorised by regulation 6.04; or
  2. an activity by a petroleum retention lessee that is authorised by regulation 6.05; or
  3. an activity by a petroleum production licensee that is authorised by regulation 6.06.1
Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations
Previous Petroleum Regulations

Previous Petroleum Regulations

Definition(s)

Previous petroleum Regulations

Previous petroleum Regulations means the Petroleum (Submerged Lands) Management of Well Operations) Regulations 2004. Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations  
Umbilical Clamp

Umbilical Clamp

Definition(s)

Umbilical Clamp

Clamp used to attach the umbilical(s) to the riser joints. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Tubing Riser

Tubing Riser

Definition(s)

Tubing Riser

Riser which consists of one or more individual strings of production tubing and a hydraulic control umbilical. NOTE If multiple tubing strings are used, they can be left either independent of each other, or secured together using some type of clamping device. The hydraulic control umbilical is normally clamped or strapped to one of the tubing strings as it is run. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Tubing Hanger Running Tool

Tubing Hanger Running Tool

Definition(s)

Tubing Hanger Running Tool

Device used to run, land and lock the tubing hanger inside the wellhead, tubing spool, or subsea tree. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Tubing Hanger

Tubing Hanger

Definition(s)

Tubing Hanger

Component used to support the downhole completion tubing string. NOTE It is also typically used to seal and contain the completion annulus from the environment. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Tree Running Tool

Tree Running Tool

Definition(s)

Tree Running Tool

Device used to run and land the subsea tree on the subsea wellhead. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards