Journal of Petroleum Geology, vol. 19(4), October 1996, pp. 393-406
©Copyright 1996. Scientific Press, U.K. All rights reserved.
INTEGRATED OUTCROP ANALOGUE STUDIES FOR TRIASSIC
ALLUVIAL RESERVOIRS: EXAMPLES FROM SOUTHERN GERMANY
T. Aigner*, U. Asprion*, J. Hornung*, W.-D. Junghans*
and R. Kostrewa *
Outcrops of Upper Triassic (Keuper) alluvial
sandstones in South Germany may provide analogues for recently-discovered hydrocarbon
reservoirs in the North Sea Triassic. Using an integrated approach, reservoir
heterogeneities in the outcropping sandstones may be characterized by means of
(1) sequence stratigraphy (including facies and architectural element analysis aided by
georadar profiling, and an identification of the hierarchy of sedimentary cycles); and (2)
petrophysics (gamma-ray logging, and porosity and permeability measurements). Primary
depositional facies and the stacking patterns of different fluvial cycles within
larger-scale sedimentary cycles play a dominant role in determining the fluid flow
behaviour of the sandstones.