Development drilling at the Heidrun field offshore mid-Norway is currently underway. The Heidrun field will be developed with a concrete hull Tension Leg Platform (TLP) in 345 meters (1132 feet) of water1,2 . The pre-drilling program to be conducted from a semi-submersible includes drilling and partially completing nine wells, setting 30" conductor and 22" surface liners in the remaining 47 TLP-template well slots and drilling and completing 6 water injection wells in two remote subsea templates.

This paper will review the extensive planning as part of the overall Heidrun project and present a review of drilling operations to date. The state of the art drilling techniques being implemented to overcome unique drilling problems and complete the substantial scope of work will be described.

Keywords:
seal assembly, tlp, mud weight, heidrun tlp, upstream oil & gas, hole section, installation, batch, spe 26696, procedure
Subjects:
Wellbore Design, Drillstring Design, Drilling Operations, Pressure Management, Drilling Equipment, Drilling Fluids and Materials, Casing and Cementing, Offshore Facilities and Subsea Systems, Formation Evaluation & Management, Asset and Portfolio Management
Copyright 1993, Society of Petroleum Engineers
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