OVERVIEW PETROLEUM SYSTEM OF TALIABU-MANGOLE SYNRIFT IN SULA SUBBASIN

Abstract
Taliabu-Mangole synrift is identified as synrift basin which was formed during
Triassic-Jurassic. As same as common type basin in Indonesia, the basin is
potential to deposit syn-rift sediment that potentially to generate hydrocarbon. Gas
seepages, oil odor and formation water (hotwater spring) as evidence which
indicated that the hydrocarbon was mature and had been migrated.
Integrating of surface and subsurface data is method to define all element of
petroleum system. Spot mapping along Taliabu-Mangole and Sulabesi islands was
conducted to review element of petroleum system from outcrop. Seismic
interpretation and evaluation of two well is conducted to gathering petroleum
system information in subsurface.
Play type analysis interpreted that Buya Shale and Bobong Coal are potential to be
source rock and mature. Study result indicated that the source rock is dominantly
gas prone. Lateral and vertical migration is interpreted occurred and postulated to
occurrence gas seepages and hotwater spring occurrence on the surface. Bobong
sand is potential to be reservoir and fracture basement is possible to be secondary
reservoir. Buya Shale is also interpreted as regional seal that covers eastern part
of Taliabu and northern part of Mangole. Thrust anticline is identified as common
structural trap which possible to accumulate hydrocarbon.

By

Fuad Ahmadin Nasution 1),Bayu Nugroho 1), Andi Krisyuniyanto 1), Andang Bachtiar 2)
1 GDA Consulting, Jl. Tebet Timur Dalam X No.2 Tebet-Jakarta Selatan, Telp 021-83792688, Fax, 021-
83792687
2 Exploration Think Tank Indonesia (ETTI), Jl. Tebet Barat Dalam 2 No.2 Tebet-Jakarta Selatan, Telp 021-
8356276