Distribution model, depositional environment and facies of coal in the AE field, Kutai Kartanegara area, East Kalimantan

The AE field is a planned coal mining area in Kutai Kartanegara, East Kalimantan. A preliminary analysis of coal and non-coal lithology conditions, which act as constituents of the AE Field, must be carried out to determine the next step in the mining business. The physical properties of several coal seams in the AE Field are different, so characterization is necessary. The purpose of this study is to characterize coal and non-coal lithology in the study area, while the aim is to determine the facies analysis and depositional environment of coal. The research method used is surface and subsurface mapping (drilling). The results showed that the AE Field has four coal seams, namely seams-1, 2, 3, 4A, and 4B, which dip to the northeast. The coal formed in the lower delta plain transitional depositional environment, in the swamp, crevasse splay, channel, levee, and inter-distributary bay facies.