In spite of retarded developments of the oil potentials in Indonesia since World War II, the Indonesian Archipelago ranks as ninth in the list of world crude production. Aside from the known oil fields in Borneo (Kalimantan), Sumatra, Java, and West-Irian (New Guinea), great possibilities exist to further develop the oil potentials of the sedimentary basins of Indonesia provided that the Indonesian Government grants liberal terms and attractive conditions for existing and new concessions to private oil companies.

This summary of the stratigraphy, structure, and oil potentials of the Tertiary basins of Indonesia is based mainly on available literature (E. W. Beltz, H. M. Schuppli, G. F. Kaufmann, J. Weeda, J. H. L. Wennekers, and others) and to a smaller degree on personal experience.

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