Using a creative and innovative approach, Chevron UK Ltd. has increased the number of well slots on Alba Northern Platform (ANP) by over 20%, at minimum cost. ANP is using four 46" OD caissons each housing two 20,000 bpd wells.

The Close Proximity Well (CPW) project is a refinement of an application seen in some Gulf of Mexico and mud-slide areas, whereby multiple wells are drilled from the same caisson. The main differences are in the caisson size, the proximity of the wellheads, and the fixed platform retrofit application in that the ANP was originally planned and constructed for single slots.

This paper will describe the planning, design and the execution of the Close Proximity Well Project. It will demonstrate how these new practises have accelerated completion of the Alba Field phased development using an existing platform. The first CPW will have been completed by the time of the presentation.

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