JPT

Vol. 58 No. 4

April 2006

Offshore Drilling and Completion

Drilling Underbalanced From a Drillship in the Santos Basin

The full-length paper describes steps taken to drill the final section of an exploratory well in 1500 m of water in the Santos basin. The first well in the area reached a fractured carbonate reservoir where massive circulation losses caused the well to be abandoned. The full-length paper discusses planning activities, additional equipment, riser modifications, and drilling procedures for a new well to be drilled underbalanced from a drillship to access the target reservoir.

View a Synopsis of OTC 17459

This article, written by Assistant Technology Editor Karen Bybee, contains highlights of paper OTC 17459, "Drilling Underbalanced From a Floating Unit in a 1,500-m of Water Depth Exploratory Well: Planning, Equipment and Rig Modifications," by A.C.V.M. Lage, E.F. Nogueira, G.S. Vanni, L.H.S. Vitullo, and and E.T.M. Fartes, Petrobras, prepared for the 2005 Offshore Technology Conference, Houston, 2-5 May. Copyright 2005 Offshore Technology Conference. Reproduced by permission. The paper has not been peer reviewed.

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