PT. Borneo Indobara PKP2B area existed in Asam-asam Basin at South Eastern Meratus Mountain. This Mountain separate Asam asam with Barito Basin, formed by tectonic movement called faulted block structure. PT. Borneo Indobara (BIB) area is laid on Jura to Quarter age formation which they are: Alluvium, Dahor, Warukin, Berai and Tanjung formation.