Reservoir Facies of the Kesan Formation : Tight Gas Exploration in the Thrace Basin of N . W . Turkey

Full diameter cores from the Eocene Kesan Formation in Baglik-1 provide an excellent example of finegrained turbidite facies that exemplify one of the principal reservoir targets in the Thrace Basin of N.W. Turkey. Two cores have been selected for display as a good representation of these reservoir facies. Thirty-six metres of whole diameter core are displayed and described with respect to sedimentary structures, lithology, texture, fractures, diagenetic features and composition. Most of the sandstone facies in the Kesan Formation are interpreted as the product of sediment gravity flow processes that were sourced from a deltaic complex to the south. Approximately 85% of the sandstone facies observed in the core occur as thinto thick-bedded turbidites that are interpreted as the proximal to distal deposits of the various elements of submarine fan lobe and/or channel environments.