Akademik Veri Yönetim Sistemi
2nd International Conference on Recent Academic Studies, Konya, Türkiye, 19 - 20 Ekim 2023, ss.110
The Zonguldak Basin hosts the majority hard coal resources in Türkiye, and several mineable coal seams are located in the Late Carboniferous formations such as Alacaağzı, Kozlu, Karadon and Kızıllı. The previous studies show that these seams are of bituminous coal in rank, and their gas contents are relatively high. Hence, Late Carboniferous coal seams and associated strata might have coal-bed methane recovery potential. Nevertheless, Rock-Eval pyrolysis data is essential for understanding the hydrocarbon generation potential of the coal seams. This study focuses on data of preliminary results from Rock-Eval pyrolysis and TOC analyses of coal seams within Kızıllı (Stephanian), Karadon (Westphalian BCD), and Kozlu (Westphalian A) formations that were cored in one deep coal exploration well from the Amasra coalfield. The Kozlu Formation displays the highest average S1 (1.7 mg HC/rock), S2 (99.4 mg HC/rock), and TOC (%72.1) values, while the Karadon Formation has the lowest mean S2 (61.7 mg HC/rock), S3 (2.8 mg CO2/rock), and TOC (%48.1) values. In the Kozlu Formation, Tmax values range from 439 ˚C to 450 ˚C (avg. 444 ˚C), whereas Tmax values of the Kızıllı (436-440 ˚C, avg. 437 ˚C) and Karadon (436-441 ˚C, avg. 439 ˚C) formations display similar ranges. Hydrogen Index (HI) values are generally low (96–167 mg HC/g TOC), and calculated HImax and effective HI values are 120–175 mg HC/g TOC and 127–181 mg HC/g TOC, respectively. Although Tmax values are passing the threshold for the oil window, the calculated HI values and measured %Rr values (%0.69-0.88) indicate that Late Carboniferous coal seams are mainly gas-prone, and have coal-bed methane potential.