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P132 The Reservoir Potential of Miocene Carbonates Rocks in the Adana Basin Southern Turkey A. Buyukutku* (Ankara University) SUMMARY This paper reports on the microfacies diagenesis and reservoir properties of the Lower-Middle Miocene Karaisal Formation in the Adana Basin southern Turkey. The Karaisal Formation reflects the continuous deposition of shallow-shelf carbonates. Karaisal Formation carbonates are up to 500 m thick. The best reservoir conditions in the Karaisal Formation occur in grain- supported facies such as Foraminiferal-Algal packstones. Secondary vuggy and moldic porosity which are common in the Foraminiferal/Algal Packstones resulted from micritic cement and the dissolution of skeletal grains during