UNLOCKING HETEROGENETIC RESERVOIR BY USING SEQUENCE STRATIGRAPHY ON SANDY FLUVIAL DEPOSITS OF THE MIDDLE BALIKPAPAN FORMATION OUTCROP, SAMARINDA, KUTEI BASIN; IT’S IMPLICATION FOR RESERVOIR DISTRIBUTION - Rizki Putra Ptratama, Rizki Putra Ptratama (Departmen Teknik Geologi, 2015)