Xavier Janson¹, Gregor Eberli²

(1) University of Miami, Comparative Sedimentology Laboratory, Miami, FL
(2) University of Miami, Miami, FL

ABSTRACT: Architecture of a Miocene Carbonate Platform System (Ermenek Turkey) - Implications for Subsurface Data Interpretation

In southern Turkey, exposures of a Miocene carbonate platform display 3-D depositional geometries that are controlled by accommodation, energy direction and type of sediment producers. Facies mapping within the 3-D outcrop framework allows for detailed reconstructions of the barrier-lagoon and platform-shore system to document the reservoir architecture and heterogeneities at the exploration and production scale.

During the Langhian, an aggrading barrier develops on the margin facing the deeper basin while platforms nucleated on elevated topography prograde within the lagoon. During the Serravallian, backstepping of the system in conjunction with an abrupt change in the faunal content produced a platform re-organization. The stratigraphic architecture is the result of the interplay of change in both accommodation and carbonate production. The physiography of the shelf, climate evolution and clastic input strongly influence the carbonate production and therefore the depositional geometries. Redeposition is an important process for the shaping the architecture on the seaward side of the barrier where gravity flows and slumps are common.

At the exploration scale the entire system, consisting of several reservoir units (barrier, lagoon, several prograding platforms) can be classified as heterogeneous. On the reservoir scale, heterogenities are caused by the geometry of the prograding margins and individual sedimentary bodies. On the flow unit scale, heterogeneities are produced by sedimentary and facies variations within individual genetic units. Assessing heterogeneities in an equivalent subsurface reservoir would require the integration of detailed geometrical analyses from 3-D seismic data with a careful calibration of logs with core data

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