Misc. (Drilling)

Well Planning Information Sheet, Well Datasheet, Well Design Information. This is the list of information required by the drilling department to plan and design a well.   BLOCK / LICENCE     WELL NAME     WELL CLASSIFICATION     PARTNERS (with %’s )     COMMITMENTS/LICENCE CONSTRAINTS –      Spud Date –      Completion Date –      Well Planning Information Sheet

The objective of abandonment is to prevent the migration of all formation fluids, but especially hydrocarbons, between formations and to the surface. There are two types of conduit which must be closed off – the open hole plus casing and the annuli. Key requirements In the open hole all intervals which contain hydrocarbons should be Abandonment guidelines

Some of the standard drilling tools commonly used in drilling are briefly described here, together with procedures for, and information on, their use. More detailed descriptions and specifications of particular tools are to be found in the relevant manufacturer’s literature. 1. Float Sub Float subs are always used when drilling pilot holes, and can also Standard Drilling Tools

1 Objective Drill 8 1/2″ hole to 15316 ft, run a lookahead VSP, drill 8 1/2″ hole to ± 15581 ft (85 ft above the “x” marker, run logs and set the 7″ liner . 2 General 1. The actual depth of the liner shoe will depend on the results from the lookahead VSP, and 8.5″ Section Drilling Programme HPHT

Objective: To abandon the well in a safe manner permitting the removal and restoration of the location. Workover number: xxx Min. required hoist capacity: T 93 Estimated time : 2.5 days Estimated start date : Account code : Well history: The well was drilled in xxx and was completed as an oil well. An Outside Abandonment programme – oil producer

1. Programme Summary Abandonment This programme will prepare the existing well for a forthcoming horizontal side-track which is due to begin immediately upon the successful completion of the abandonment. Due to the target constraints, the abandonment will commence from below the existing 20″ shoe. The existing completion will be retrieved from the wellhead down to Abandonment and sidetrack drilling programme