This paper describes a dewatering operation on the Texaco Highlander Subsea Production Facility located in the North Sea approximately eight miles north-west of the Texaco Tartan platform.

Difficulties in commissioning gaslift operations on remote subsea wells were attributed to hydrate formation and unsuccessful dewatering after pressure testing. The geometry and changing diameters of the gaslift line were complicating factors.

A new application of foam technology was made and this paper describes the background to the task and gives a record of the practical operations undertaken. The job was successful and the various further applications of this type of technology are discussed.

Keywords:
methanol, application, tartan platform, foam treatment, liquid, foam technology, choke, upstream oil & gas, aqueous foam treatment, gas injection
Subjects:
Artificial Lift Systems, Well & Reservoir Surveillance and Monitoring, Pipelines, Flowlines and Risers, Improved and Enhanced Recovery, Formation Evaluation & Management, Gas lift
Copyright 1987, Society of Petroleum Engineers
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