This paper discusses the applications of gas and water tracers in the Central Fault Block (CFB) of the Snorre Field in the North Sea. An extensive tracer program was initiated in 1993 to improve the understanding of the flow dynamics in the field.

The CFB of Snorre has been produced by WAG injection since 1994. The tracer program has involved 3 injectors and 4 producers. Tracers applied were perfluorinated hydrocarbons (PFCs) and SF6 as gas tracers. As water tracers tritiated water (HTO), chemical SCN− and radioactive S14CN− have been applied in addition to the new tracer 4-fluoro benzoic acid (4-FBA).

Results from this integrated tracer study have improved the understanding of fluid flow and WAG injection efficiency in the reservoir. The tracer program will be continued and will also be expanded to other fault blocks.

Keywords:
tracer, production well, injection, chemical tracer, aurdal saga petroleum, breakthrough, tracer program, reservoir, torgersen, tracer test analysis
Subjects:
Well & Reservoir Surveillance and Monitoring, Reservoir Characterization, Improved and Enhanced Recovery, Formation Evaluation & Management, Waterflooding, Tracer test analysis
Copyright 1999, Society of Petroleum Engineers
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