Developing the Largest Carbonate Oil Field in SE Asia – Banyu Urip, Cepu Block

Mobil Cepu Ltd and partners in the Cepu KKS, East Java basin plan to start development drilling of the Banyu Urip field in 2012 with a targeted startup in 2014. This is a very important development for Indonesia to maintain the Indonesian national production target as this field will produce 165k BOPD initially. The Banyu Urip field was discovered in 2001 and has been certified by ITB with more than 1 Billion BBL in place making it the largest onshore oil discovery in Indonesia in the last several decades. Banyu Urip is a high relief Oligo-Miocene carbonate isolated platform onshore at approximately 4000 feet TVDSS. 30 producers will be required to meet the initial target (5500 BOPD ave per well). 13 water injectors will be required to meet aquifer pressure maintenance target. This paper will describe the field and development concept. The Banyu Urip Field is an isolated platform that rises almost 3000 feet from the surrounding carbonate platform. The platform is made up of repeated 150 foot thick cycles of shallow water carbonate that has been exposed to fresh water repeatedly and leached to form high quality reservoir rock with average 26% porosity and 100 mD permeability in the interior.