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Geological Society, London, Special Publications; 1992; v. 65; p. 21-30;
DOI: 10.1144/GSL.SP.1992.065.01.03
© 1992 Geological Society of London

Sedimentology and Stratigraphic Correlation

Techniques and applications of petrophysical correlation in submarine fan environments, early Tertiary sequence, North Sea

I. R. Hatton1, M. Reeder1, M. St. J. Newman1 & D. Roberts2

1 Kerr-McGee Oil (UK) plc, 75 Davies Street, London W1Y 1FA, UK
2 ResTech Europe Ltd, 5 Red Lion Court, Off Alexander Road, Hounslow, Middlesex TW3 1JS, UK
Roberts Associates, Charnwood, Mayfield Road, Weybridge, Surrey KT13 8XB, UK

Accurate stratigraphic delineations and correlations are key factors in exploration and development of early Tertiary reservoirs of the North Sea. In the submarine fan environment, application of biostratigraphic data can be complicated by stacking of sand sequences. A sand indicator is derived from a wireline log computation. The sand intervals are then edited out to generate a log profile of the background sedimentary sequence. Additional refinement is obtained by use of cross plot analysis to define petrophysical attributes of selected stratigraphic units. An example is described where such analysis has been applied to the Balder Formation where a ‘tuff profile’ has been established. Further examples illustrate how the methods serve to extrapolate detailed biostratigraphic data of wells into adjacent wells with limited or no data.