The Peciko field produces gas from Upper Miocene deltaic reservoirs. It is located in the prolific Kutei basin(Indonesia, East Kalimantan) in water depths around 40 meters.
The first exploration well (Peciko-1) drilled on the top of a deep seated structure in 1982 tested only marginal gas pay above the structural closure. However, it was not until 1991 (with North-West-Peciko-1 located on the western flank) that the giant gas accumulation was actually tested.
This success followed the conclusions and recommendations of a comprehensive regional study that stressed the potential trapping role of facies variations occuring between the shelf and the shaly overpressured prodelta.
The following appraisal drilling campaign and the intensive associated pressure measurements program induced a comprehensive geological model (with stratigraphic and hydrodynamic expressions) for this complex multilayers field. This model and methodology developed for Peciko was later evolved significantly and applied to the neighboring Tunu field, contributing to the understanding of this supergiant field (16 Tcf 2P, reserves) and extending its limits, both laterally and vertically, well beyond those of the initial recognized accumulation.
An estimated 6 Tcf, 2P reserves are present in the Peciko field. The production (0.72 Bcf/day) started last October using two platforms, increasing the Peciko - Tunu potential up to close to 3 Bcf/day, and confirming their major long term contribution to the largest liquefaction plant in the world.