DEPOSITIONAL ENVINRONMENT AND PALEOCURRENT THE MIDDLE OF WARUKIN FORMATION BASED ON SEISMIC AND WELL LOG DATA IN NORTH-EAST PART BARITO BASIN, SOUTH KALIMANTAN

Abstrak

Explorations in the Barito basin has started nearly 100 years and was marked by the discovery
of the Tanjung Field in 1938 (Maso at all 1993). The middle of Warukin Formation is one of the
reservoir formation in the Barito basin of North-Northeast. Barito Basin is located between
Sundaland in the west and Meratus in the east (Satyana, Awang.1994). An understanding of the
depositional environment and paleo-current will be very useful for the exploration and field
development optimization of oil and gas.
The data used in this researcher seismic 3D data and well data. From the existing data created
seismic facies maps and correlation maps well with the markers used datum is the Top Formation
Middle Warukin.
Downlap termination pattern found on the seismic line 75H - 37 at the lower limit indicates the
time of formation of this facies occur sea level rise. Configuring the parallel reflection pattern -
subparallel and divergent indicate the depositional environment is shelf / platform or delta
platform (Serra, O, 1990). Coarsening upward to fining upward pattern relatively evolved from
wireline log analysis, in which a pattern is formed on the shore face transgressive delta then
serrated pattern formed in the shelf. Based on the seismic data and log data as well as supporting
data from the regional geology of the Barito Basin, it can be interpreted that the study area is
formed on the delta depositional environment - shelf.
Paleo-current study area can be determined based on seismic facies maps and regional
conditions Barito Basin. Of seismic facies maps can be interpreted Paleo-current direction is
relative to the south - west with relative sediment supply from the
north - east.