Well Planning Checklist

GENERAL WELL PLANNING-ALL WELLS

 y/n

 Comments

This section must be completed for all wells. 

1

Well Planning Documents/Meetings

1.1 

Is this well design the outcome of a structured planning process? 

1.2

Have planning process meetings been held and minuted?

Peer review

Risk analysis

Option selection

Time/depth curve review

1.3

Is there a project schedule for the overall project?

1.4

Have the final signed off objectives of the well been received?

1.5

Can all the well objectives be met?  If not, state what objectives have been compromised.

1.6

Have relevant and nearby wells been identified as being suitable for use in the preparation of the drilling programme?

1.7

Have any other meetings directly relevant to the well design been held and minuted?  Give brief details (ie with the HSE).

1.8

Are the Basis of Design and Well Planning documetns  available, the content of which accurately reflects statements made in the installations Safety Case regarding routine drilling operations?  If yes, state drawing number and date of issue.

1.9

Are there any significant differences between the design of this new well and the design illustrated in Basis of Desing document?  If yes, give brief details (refer to separate documentation if necessary).

1.10

Is there a geological side-track possibility?  If yes, has the well design been compromised in any way to accommodate this?  (Refer to separate documentation if necessary.)

1.11

Is there a need to drill a pilot hole for geological control prior to drilling a high angle or horizontal section?  (Refer to separate documentation or give details separately if necessary.)

2

Well Design – General Considerations

2.1

Do all features of the well design comply with the Company General Drilling Policy?

If not, note the fact on the front page of the QA/QC Document, and ensure that copies of the completed Risk Assessment and Policy Dispensation Approval forms are held in the Well File.

2.2

Has the Shallow Geology Forecast been received?  Are there any shallow hazards?  (Give details.)

2.3

Has an assessment of borehole stability been performed?

2.4

Has the Directional and Survey Planning Checklist been completed? (This concerns the surveying of both vertical and directional wells.)

2.5

Have relevant Stuck Pipe Avoidance Guidelines been taken into account?

2.6

Have torque/drag simulations been performed to confirm the viability of the operation?  If yes, give brief details of results or refer to separate report.

2.7

Have the effects of casing wear been considered?  If yes, give brief details or refer to separate documentation.

2.8

If the operation includes the re-entry of an existing (older) well, has allowance been made for any time-related deterioration of the existing casing and wellhead (e.g. corrosion)?

2.9

Are there any special requirements in respect to the selection of materials for tubulars or seals (e.g. due to H2S, CO2 or corrosive reservoir fluids)?  If yes, give brief details or refer to separate documentation.

2.10

Are there any special well design requirements in respect to expected bottomhole temperature?  If yes, give brief details or refer to separate documentation.

2.11

Are there any special formation damage considerations?  If yes, give brief details or refer to separate documentation.

2.12

Have any potential fluid loss zones been identified, and contingency plans prepared in advance?

2.13

Will the drilling operation utilise downhole injection for disposal of drilled cuttings?  If yes, give brief details or refer to separate documentation.

2.14

Have hydraulic simulations been performed to confirm that required flowrates can be achieved, and bit hydraulics optimised?

2.15

Does the well design allow the well to be easily suspended and abandoned at a later date without the need for a full-scale rig intervention?

2.16

If the well is to be drilled from a floating rig:

Will it be moored or on DP?

If rig is on DP, has a drive-off exercise been carried out?

If rig is to be moored, has a mooring analysis been performed?

Has a riser analysis been performed?

Is the top hole section to be drilled riserless?  If not, a Policy Dispensation will be required

Is a pilot hole required to test for shallow gas?

2.17

If the well is to be drilled by a jack-up rig:

Has a geotechnical survey of the location been received?

Is there a possibility of punch-through?

Has seabed scour been addressed?

Has a conductor analysis been performed?

Is the conductor shoe strength sufficient for diverter operation?

2.18

Has a stuck pipe course been conducted as part of the rig crew preparation?

3

Well Applications

3.1

What type of application or notification has been sent to the HSE/DTI?

Drill

Complete

Drill and complete

Suspend/abandon

Other (specify)

3.2

Does the application give all details required?

3.3

If the well has an undisturbed BHT> 300°F and pore pressure > 0.8psi/ft or BOP rating > 10,000psi, does the application give all details required?

3.4

Has an application for exemption for OBM usage for the field/installation/well been sent to the Authorities?

3.5

Does the application reference the OBM Strategy Document?

3.6

Have the HSE or DTI imposed any conditions for the drilling of the well?  If yes, what are they?  (Refer to separate documentation if necessary.)

4

Equipment/Logistics/Novel Techniques

4.1

Are there any concerns on materials availability that could affect the well design, or the well timing?

4.2

Has a casing requirements forecast been completed, and forwarded to the Procurement department?

4.3

Is any new untried equipment to be tested in this well?  If yes, has any form of risk analysis been performed to quantify the effects of a possible failure?  (Refer to separate documentation if necessary.)

4.4

Are there any safety-related, or technically challenging aspects of the programme which require the involvement of a Technical Endorser?  Identify those sections, and include appropriate endorser(s) in the preparation of the programme.  Such Technical Endorsers must sign the final drilling programme.

WELL PLANNING-STANDALONE EXP/APP/DEV WELLS

This section must be completed for all standalone wells drilled by mobile rigs, and in part for Exp/App wells drilled from multiwell installations.

5

Drilling Unit/Safety Management

5.1

Type of drilling unit? (Platform/jack-up/floater.)

5.2

What type of audit has been carried out on the unit/contractor?  (Technical, equipment, safety management, staff competence etc.)

5.3

Has an approved Company/ Contractor interface document been prepared and issued?

5.4

Has a combined operations safety case been prepared and issued?

5.5

Has the installation’s SIMOPS manual been consulted and/or amended to allow the drilling operation to proceed? 

5.6

If applicable, has reference been made to this type of well activity in the Installation Safety Case?

6

Well Planning Documents/Meetings

6.1

If applicable, has the singed Well Location Memorandum been received?

6.2

Has the Site Survey/Shallow Gas Assessment been received?

6.3

Does the potential for shallow gas pose a significant hazard?  If so, what contingency plans have been developed?

6.4

Has the Shallow Geology Forecast been received?  Are there any shallow hazards?  (Give brief details.)

6.5

Has the signed Operations Forecast (pore/fracture pressure forecast) been received and checked by the Planning Engineer?  Any comments?  (Refer to separate documentation if necessary.)

6.6

Has the Mud Programme been chaecked and agreed?

7

Well Design Considerations

7.1

Is there a general field/installation casing design document(as part of the Installation Safety Case)?  If yes, is the design of the new well consistent with the general design?  If not to either of the above, has a separate Casing Design been completed in accordance with the  Casing Design Policy?  If not, is a copy of the necessary Risk Assessment and the Policy Dispensation available in the Well File?  (Provide details on the front cover of the QA/QC Document, and refer to separate documentation if necessary.)

7.2

Do the design kick tolerances comply with the agreed Policy (which may or may not be the same as the Casing Design Policy)?  If not, note the fact on the front page of the QA/QC Document, and ensure that copies of the completed Risk Assessment and Policy Dispensation Approval forms are held in the Well File.

7.3

Are the casing seats significantly different to surrounding offset wells?  If yes, give brief details (refer to separate documentation).

7.4

Is H2 S a possible hazard in this well?  If yes, at what concentration level could it be present?  Have the UKOOA Guidelines on Detection and Control of H2 S been referred to in the well design?

7.5

Has the Site Survey/Shallow Gas Assessment been received?

7.6

Does the Cement Programme provide adequate isolation of any permeable zones?  If not, give brief justification (refer to separate documentation if necessary).

8

Well Applications

8.1

Has an application to locate the drilling rig been sent to the relevant authorities?

8.2

Detail any special restrictions on location (e.g. shipping clearway, MOD firing range, conservation area).  Are these restrictions likely to have an impact on Well Design or Operations?  Give details and any precautions taken to minimise impact.

WELL PLANNING - MULTI-WELL INSTALLATIONS

This section must be completed for all wells (Dev and Exp/App) drilled from a single surface of subsea multiwell locations.

9

Well Design Considerations

9.1

Do any surrounding wells need to be plugged according to Asset Policy?  If yes, have the OIM and relevant Production personnel been advised, and has a copy of the Risk Assessment and Policy Dispensation document been placed in the Well File?

9.2

Will any changes in nearby wells production or injection affect the drilling of this well, particularly whilst drilling the reservoir section?  If yes, give details or refer to separate documentation.

9.3

Is there a requirement for the annuli of neighbouring wells to be monitored by the Asset?  If yes, give details.

9.4

Is a Well Planning document available, the content of which accurately reflects statements made in the Installation Safety Case regarding routine drilling operations?  If yes, state drawing number and date of issue?

9.5

Are there any significant differences between the design of this new well and the design illustrated in the Basis of Design document?  If yes, give brief details (refer to separate documentation if necessary).

9.6

Is the prognosed reservoir pressure significantly different to that shown on the wall chart?  If yes, how has the well been designed to safely account for this?  Give brief details or refer to separate documentation if necessary.

9.7

Is there a General Field/Installation casing design document (as part of the Installation Safety Case)?  If yes, is the design of this new well consistent with the general design?  If no to either of the above, has a separate Casing Design been completed in accordance with the Casing Design Manual?  If not, is a copy of the necessary Risk Assessment and the Policy Dispensation available in the Well File?  (Provide details on the front cover of the QA/QC Document, and refer to separate documentation if necessary.)

10

Field/Installation Applications

10.1

Have generalised applications to do well-related work on this field/installation been sent to the HSE?

Application to Drill

Drill and complete

Drill/complete/test/suspend

and consent received?

10.4

Has an application for exemption for OBM usage for the field/installation/well been sent?

10.3

Has consent been received?