2019_EJRNL_PP_TEGAN_LEVENDAL_1.pdf
Terbatas  
» Gedung UPT Perpustakaan
Terbatas  
» Gedung UPT Perpustakaan
The Swedish island of Gotland is located within the Baltic Basin. During the Late Ordovician the
region around Gotland was part of a shallow epicratonic basin in the southern subtropics. In these
warm-water environments algae flourished, diverse reefs developed close to the coastline and
further outboard carbonate mounds developed. These mounds formed rigid high relief structures
surrounded by fine-grained siliciclastics and marls and can be detected on seismic images as
isolated concave upwards features. The sedimentary succession beneath Gotland was intensely
investigated in the 1970s and 1980s for its hydrocarbon potential, and subsequently, oil was
commercially produced from reservoirs within Ordovician mounds. In 1981, a 3D seismic survey
was conducted by Horizon Exploration Ltd over the Fardume mound on northern Gotland. To
date no results from these 3D data have been published in scientific literature.
The region of Gotland aims to produce 100 % of its energy from renewable sources and currently
the majority of Gotland’s energy is provided by wind turbines. Due to the intermittent nature of
wind power, one solution to regulate the supply of electricity from wind energy is Compressed
Air Energy Storage (CAES).
In this study, we convert the 3D seismic survey acquired over the Fardume mound from scanned
TIFF images to SEGY format. These data are then utilized together with well data to gain a better
knowledge of the geological structure of the mound and to examine its reservoir characteristics
and potential for CAES. To date, carbonate mounds on Gotland have mainly been reported in the
scientific literature using well data. This 3D seismic survey, therefore, provides a rare
opportunity to better characterize and investigate the structure of one of the carbonate mounds on
Gotland.