The Drilling Programme shall be checked by the Drilling Supervisor to ensure that all the information necessary for the preparation and commencement of directional operations has been included.

Where any necessary data has not been included, it shall be requested by the Drilling Supervisor prior to commencement of operations.

Information to be Included in  the Drilling Programme

The required information, that must be included in the Drilling Programme, includes:

• surface co-ordinates, both grid and geographical
• target co-ordinates, target size and tolerance(s)
• kick-off point depth and build (and, as applicable, turn) rates
• the Survey Programme, including contingencies in the event of Collision Risks clearance ratio less than 1.5
• DFE TVD above SS datum
• calculated magnetic field strength (mT)
• calculated gravity field strength (g)
• calculated dip angle (deg)
• reference azimuth (deg)
• recommended BHA’s to be used including contractor agreed dog-leg potential values for each assembly

Note: The BHA’s quoted are to be used as a guide and modified as drilling conditions and directional requirements dictate.

Minimum Survey Programme

The Drilling Programme shall clearly state the required frequency for each hole section, which shall depend on the required positional certainty for operational safety purposes.

In this way, all wells shall be surveyed to meet the operational safety and reservoir exploitation requirements, which include:

• relief well drilling
• collision avoidance
• geological targets and constraints
• local legislation.