This document provides the outline of the minimum content of a Drilling and a Completion/Work-Over Programme (Well Programmes).
1 REFERENCES
1. Well Construction Process
2. Completion, Construction and Intervention Process
3. Management of Change Standard
4. Well Data Package (part of the Well Construction Process)
5. Basis for Design document (part of the Well Construction Process)
6. Corporate Well Examination Scheme
7. Affiliate Well Examination Scheme
2 GENERAL
LANGUAGE
1. Official language of COMPANY is English and therefore Well Operations programmes shall be written in English or have English translations.
DISTRIBUTION
1. Refer to the Well Construction Management Process.
2. In addition, an electronic approved copy shall be sent to the Group Well Operations Manager prior to spud.
3 WELL PROGRAMME CONTENT
1. It shall conform to the Well Construction Process, the Well Data Package, and the Basis for Design Document, DOP-DR-P-15-005.
2. Geological (Source: Sub-surface Dept.) data shall include:
a. A lithology column
b. Formation Tops (depths stated as TVDSS)
c. Formation Tops (depths stated as TVDRT – estimated until final elevations are known)
d. A Pore Pressure and Fracture pressure curve together with Overburden
e. A temperature gradient in graphical format.
3. Data Acquisition Programme (Source Sub-surface Dept):
a. Coring Requirements
b. MWD/LWD requirements
c. Wireline logging requirements together with down-hole fluid sampling and pressure point requirements
d. Mud Logging requirements together with a Sampling programme.
4. Targets in UTM and Geographic (Source: Sub-surface Dept.)
a. Potential hole problems based on offset data and site surveys
b. Contingencies to the well construction plan.
c. Survey requirements and dogleg limitations.
d. FITs and surface pressure limits anticipated for each section.
e. Pertinent Data Sheet or Well Summary Sheet in A3.
f. An example of a Well Summary Sheet is shown below.
Figure 1 Example Well Summary Sheet
5. Rig Elevation schematics
a. In the case of jack-up rigs over Platforms, stand-off and anti-clash analysis will have been completed utilising the rig Contractor’s CAD drawings. Rig diverter lines will be included in the clash analysis.
b. Elevation schematics should also include platform elevations, platform guide elevations, together with both the LP and HP riser requirements shown diagrammatically.
c. Stack-up drawings shall include the BOP(s) and wellhead.
6. Specify minimum stock levels of drilling fluid, mud chemicals and additives for each section.
7. In remote operational areas on-shore where supply is slow, or delayed, minimum operating stock levels at the well-site shall also be considered such that increased buffers are available. i.e.: Fuel, water.
8. Abandonment Programme. The abandonment and/or suspension programme shall be included within the well programme together with a diagram.
9. Mud Programme. This section gives details of mud properties and required volumes for each hole section. The minimum stock levels for drilling fluids and additives should be specified. Allowance should be made for mud losses and well control situations.
10. Location information
a. For offshore locations, off-shore surveys shall confirm that the location is clear of any sub-sea architecture (structures and pipelines), confirm soil characteristics for the planned jack-up under full pre-load conditions, and confirm the absence of surface boulders and also confirm dip of the seabed. Cores and high velocity seismic may also be integral to the site survey enabling a complete picture of the offshore location.
b. Should a jack-up be planned to stand over a platform, then the footprint of the jack-up must be compared to the spud cans of all previously known jack-ups that have stood over the platform. Consideration must be given to rock dumping to avoid rig lateral slippage while attempting to pre-load.
c. For onshore remote locations consideration must be given to site construction ref: cellar and pad, camp positioning, together with road access, bridge limitations (height and load bearing capability). Proximity to supply (water and fuel) becomes critical in logistics planning.
d. For onshore sites close to Towns, Cities, etc, the planning and permissions process becomes more sensitive and additional environmental measures are expected.
11. Bit Programme
a. More than one bit type should be available to allow for unexpected Lithology changes: back up bits, utility bits and junk bits should also be included. Hydraulics calculations and nozzle sizes should be included.
12. Casing and Cementing Programme
a. This section gives details of the casing string including accessories for each hole section. It should detail the method of making-up, running and loading. Each casing string should be followed by details of the cement slurries and volumes.
b. Planned Cementing programme from Service company including the ECD calculations
13. Directional and Surveying programme
a. This section gives details of the directional and surveying requirements for each hole section including collision avoidance and survey checks. IFR and/or IIFR requirements will be stated.
14. Logging Programme
a. Logging programme for each hole section along with associated equipment required. Specific safety issues to be addressed include perforating, radioactive material and downhole sample pressure chambers.
15. Outline DST Programme
a. This section outlines the well test programme as well as the test objectives and equipment required.
16. Suspension and abandonment programme
a. As per requirements laid down in Basis for Design (Well Design Document)
17. Reporting Procedure
This section details reporting procedures between rig and shore-base. It has information relating to tight hole classification. It also contains the following standard forms:
a. FIT/Leak off test
b. Casing and tubing tally
c. Cementation report
d. COMPANY Pressure Control Worksheets
e. Incident Report.
18. Load out lists
a. This section gives details of tools and equipment required and the name of the supplier for each hole section.
19. Time Planner
a. The Time planner states the call-off requirements of both equipment and personnel on a daily basis.
20. Amendments
a. Amendments to the Programme must be approved by the Well Operations Superintendent prior to issue to the rig and/or other interested parties.
4 SAFETY POLICY
Refer to Policy on Health, Safety and the Environment.
5 APPROVALS AND AUTHORISATION
The Programme shall be produced by the Well Operations Department and approved by the Operations Manager and Project Manager. The front page shall include the name of the originator, the checker (including the Well Examiner nominated by the Affiliate Well Operations Manager) and the approvers. Each person shall sign accordingly.
6 COMPLETIONS/WORKOVERS AND INTERVENTIONS PROGRAMME CONTENT
1. The Well Operations Manager, Operations Manager and Project Manager shall approve the Programme. The front page shall include the name of the originator, the examiner and the approver.
2. The Completion or Work-Over Programme, as a minimum, shall include information in the following categories:
a. Permit, Title and Well Location details.
b. Reservoir data
c. Objectives of the work over or intervention.
d. Operations time estimate.
e. Operations sequence summary.
f. Detailed Completion schematic.
g. Fluids – Completion fluid and fluids used for the work over.
h. Details of equipment including detailed running and setting procedures.
i. Evaluation and data acquisition requirements.
j. Pressure testing.
k. Section for amendments.
l. Minimum contingency stocks of materials.
m. Blowout preventer (BOP) configurations and barriers in place throughout the whole Programme. This shall also include pertinent isolations that may be required.
7 MANAGEMENT OF CHANGE
1. Changes to Operations shall be approved by the Well Operations Department according to change control procedure WOR 33 Management of Change.
2. Programme changes must be issued in writing.
3. Changes will be numbered sequentially and inserted into the amendment section of the Well Operations Programme or into the Well Completion, Work over or intervention programmes.
4. Differences between the Well Data Package and the Basis for Design documentation prescribed by the Well Construction Process shall be documented according to control procedure - Management of Change.