Source and Reservoir Rock Potential of Tertiary Units in the Kozaklı Basin, Central Anatolia, Turkey

Abstract

The authors present the hydrocarbon source rock potential and reservoir properties of the Eocene Formations in the Central Anatolian Kozaklı Basin. Potential source and reservoir rocks in the Kozaklı basin include transgressive-regressive bank carbonates, fore-bank, deep-marine shales and sandstones, and coal and bituminous facies. The organic geochemical data of the Middle Eocene shales (Sarılar Formation) show that inadequate to marginal source rock qualities, and marginally mature to overmature characteristics, resulting from heat flow regime of the studied area. Alemli Member of theİncik Formation is good to excellent according to TOC wt% and immature to mature source rock from T max values. Sedimentological features and age data indicate that the Uzunlu Formation was deposited under the control of antecedent topography. Reservoir properties of the Uzunlu Formation and Keklicek member indicate that the carbonate unit is not adequate for reservoir rock. However, siliciclastics of the Sarılar Formation could be reservoir potential due to its high porosity and permeability values.