B. Lambert1, B. C. Duval2, Y. Grosjean1, I. M. Umar3, and P. Zaugg1
2Institut Français du Pétrole, France
3Total Indonesia, Indonesia
ABSTRACT: Impact of an Evolving Geological Model on the Dramatic Increase of Gas Reserves in the Mahakam Delta: The Peciko Case History
The Peciko field is located in the prolific Kutei basin (Indonesia, East Kalimantan), southward of the supergiant Tunu gas field, in water depths of around 40 meters. The field produces gas from Upper Miocene deltaic reservoirs. The lithology comprises a repetition of superimposed deltaic cycles (average thickness in the range of 30 – 50m). The main pay zone of the Peciko field consists of a stacking of delta front mouth bars. Based on flooding surfaces, the upper Miocene has been subdivided into eight main intervals (MF2-3 to MF8-9). Later additional intervals have been proposed related both to stratigraphy and pressure data.
The main kitchen involved in the sourcing of the Tunu-Peciko gas fields lies in the syncline axis located to the west. The main source rocks in the area are composed of organic-rich shales (gas prone) associated with the tidal deltaic plain and deltafront (no coal). Hydrocarbon generation began three million years ago and is still active today.
AAPG Search and Discovery Article #90906©2001 AAPG Annual Convention, Denver, Colorado