The clastic levels of Zonguldak Formation penetrated by 3 wells drilled between Zonguldak- Amasra, which are located in the Western Black Sea Region, are the main topic of this research. The age of the Zonguldak Formation is Carboniferous. The Çakraz, Zonguldak and Alacaağzı Formations are penetrated in the studied wells. The unit largely consists of economic coalfields. In addition to the coalfields, the unit consists of sandstones, conglomerates and shales. The petropyhsical specifications are studied through using the log datas of Gamma Ray, Caliper, Sonic Interval Transit, Neutron, Bulk Density, Resistivity, and SP, which are taken from the 3 wells that penetrated the Zonguldak Formation. From the well logs, it is detected that there are sandstonesconglomerates, shale and coal as dominant lithology. In the X well which is evaluated through RHOB and PHIN together, 0.21-0.44% porosity rates are obtained in the sandstones between 1490-1530 metres. In the Y well, the datas are notably low excluding some levels which reach up to 0.3%. The values of 0,20-0,67% in the first 20 metres, 0,18-0,44% between 50-74 metres, 0.18-0.44% between 2400-2450 metres are obtained through the Sonic log datas in the Z well. According to the datas obtained, the potential of reservoir rocks in the Zonguldak Formation is poor in the studied wells.


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