Samples were collected from 150 wells to determine the oil and gas potential of the mother bed of the Karabogaz formation with an area of 1000 km(2) located in the Adiyaman oil field. Of these, 46 samples from 14 wells were selected for geochemical studies. The results of the analyses showed that the total organic carbon content in the mother bed is within the limits of 0.82-7.29%. The types II and II/III organic matter present in it is mature. Based on the distribution of the properties of the organic matter in this territory, it was concluded that the Karabogaz formation occurs in the shelf zone in a small basin limited from the bottom. The mother bed was formed in shelf medium under the effect of rising water and organic facies in the Karabogaz formation so that it contained phosphates.