Core Laboratories has completed a sequence stratigraphic and regional geochemical study of the Tarakan Basin. Consistent problems have plagued operators in the Tarakan Basin, namely poor sequence and seismic control, extensive reworking of sediments, poor stratigraphic controls, lack of closures, young migration and lack of competent seals. The main aim of the study was to erect a usable sequence stratigraphic and chronostratigraphic framework for the Tarakan Basin, to constrain the extensive geochemical database within this framework and to identify the functioning of petroleum systems in the Tarakan Basin.
The study was focused on fourteen (14) key stratigraphic control wells in the Tarakan, Muaras and Berau sub-basins of the Tarakan Basin and on circa 2,000 km of regional seismic lines which were made available for appraisal and limited reinterpretation. The geochemical component focused on thirteen (13) key wells, plus oil/extract data from an additional one well and five (5) oil/gas fields.