Warta Geologi, Vol. 46, No. 3, December 2020, pp. 225–229

Seismic geomorphology of channels in X-Block, Penyu Basin

Nik Nur Anis Amalina bt. Nik Mohd Hassan*, Liaw Kim Kiat, Md
Yazid b. Mansor

Petroleum Geoscience, Department of Geoscience, Universiti Teknologi
PETRONAS, 32610 Seri Iskandar, Perak, Malaysia

* Corresponding author email address:
nik_17005940@utp.edu.my

Abstract:
Penyu Basin is a complex, intracratonic basin, situated on the northern
Sunda Shelf. This basin formed during Oligocene, and geological setting of this
area is a typical Southeast Asian Tertiary rift system. An oil discovery has
been made in X-Block of Penyu Basin. However, it was relinquished in 2006 due
to the non-commercial oil discovery. X-Block consists of mostly monoclinal structures
that do not seem to provide an efficient trapping mechanism because of the very
low reliefs. Three wells have been drilled in X-Block and tested primarily on
the structural traps, mainly the basement drape structures. This research aims
to analyze the stratigraphic traps, focusing on channel features. This is done
with the aid from seismic geomorphology. This method helps examine buried
landforms by using seismic data as a tool. By seismic geomorphology study,
several channel features can be recognized. Most of the channels can be found
in upper and middle part of the seismic section. As going deeper to the bottom
section, only lineaments of faults are visible. In the upper part of the
seismic section, straight and long channel features can be observed and as
moving downwards, the channel sinuosity increases resulting in meandering
channel. From this seismic geomorphology study, it confirms that there are
channel systems in X-Block of Penyu Basin.

Keywords:
Penyu Basin, stratigraphic traps, channel-fill trap, seismic geomorphology,
channel features

DOI :
https://doi.org/10.7186/wg463202010

ISSN
0126–5539; e-ISSN 2682-7549