K utai Basin produced by the process of expansion (rift basin) that occur in the Middle Eocene involving division Makassar Strait and the northern part of the Sulawesi Sea. During the Middle Cretaceous to Early Eocene, the island of Borneo is the scene of the collision with microcontinent, island arc, trapping oceanic plate and the intrusion of granite, form the bedrock on base Kutai Basin. Research areas in the Field Pamuncar, Group of Balikpapan, East Kalimantan, the method used in this research is the analysis method of sequence stratigraphy using well log data. The method helps in interpretation depositional environment. The results of the study analysis based on the concept of sequence stratigraphy, the study area can be divided into four parasequenset, where the withdrawal of correlation stratigraphy directed from the direction Northwest - Southeast. In MIR8 and MIR9 there are three parasequenset, whereas in MIR13 and MIR15 there are four parasequenset, further to the southeast have thickening.