Oligo-Miocene Carbonates of the East Java Basin, Indonesia: Facies Definition Leading to Recent Significant Discoveries*

Awang H. Satyana, Djumlati

(BPMIGAS – Indonesia’s Implementing Body for Upstream Oil and Gas Business)



Prospectivity of the Oligo-Miocene carbonates of the East Java Basin have been proven since early 1970s. However, the significance of the carbonates as oil producer have not obtained full attention until the late of 1990s when uninterrupted significant discoveries within the carbonates resulting in hydrocarbon reserves in excess of 900 MMB oil and 700 BCF gas take place. This number will be continually increasing since aggressive exploration ventures are being made by oil companies operating in this area. Eleven new working areas are offered in Indonesia in 2003, eight of them are located in the East Java Basin and the Oligo-Miocene carbonates are their main objectives. The geology and petroleum system of the Oligo-Miocene carbonates of the East Java Basin are increasingly well defined.


* American Association of Petroleum Geologists (AAPG), International Conference and Exhibition, Barcelona, Spain, September 21-24, 2003


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