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Ian Saxby

BP, Aberdeen, U.K.

ABSTRACT: Impact of 4-D Seismic Reservoir Monitoring in Schiehallion Field UKCS

Following the successful 1999 4-D (time-lapse 3D) programme and the powerful impact it had on both reservoir management and well planning, acquisition was repeated during the summer of 2000. Data was acquired over 390 km2 of Quad 204 in the UKCS Atlantic Margin. The data covers all three BP operated West of Shetland producing fields, Schiehallion, Foinaven and Loyal. The business case for the programme was based on the successful application of the 1999 data for;
a) Reservoir management. Qualitative comparison of the 4-D seismic amplitude difference data with the reservoir model pressure predictions and well performance.
b) Identification and optimisation of infill producer drilling locations by identifying un-accessed compartments.
c) Identification of infill injector locations by identifying unsupported flow units and producers.

The explicit application of the data together with the direct added value assured the partnerships support for the 2000 programme. (Parr 1999)

This paper describes the Schiehallion experience of using 4-D and summarises the impact it has had on the wider BP community. The success of 4-D in Schiehallion and other UKCS field has lead to a more general application of the process.

AAPG Search and Discovery Article #90906©2001 AAPG Annual Convention, Denver, Colorado