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2001
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Photogeology and GIS in oil exploration in ecuador
Conclusions
It can be concluded that with the help and interpretation
of remote sensing images, like satellite imagines, radar
imagines and aerial photographs, it is possible to identify
certain useful geological information, part of a petroleum
prospecting, that let us formulate hypothesis on the
presence of petroleum reservoirs.
Considering the different remote sensing products applied
for this study, the radar images are the ones that best
express the structural characteristics. The Landsat TM
images also show the structures, but cloudcover are often
a problem to obtain good quality images of the Amazon
region. On the other hand, the aerial photographs show
more detail due to its scale but have the same problem
with clouds. Also the processing phase of the photos into
a ortho photo mosaic is a more time consuming job.
The identification of geological lineaments on remote
sensing images allows us to make a density map of the
geological lineaments intersections. This is considered to
be a great tool to help to find the location and distribution
of the structures, which consists mainly of failures and
litological differences.
In block 28 there is a coincidence between the
distribution of the density isolines generated with the
PDIM and the fault transcurrent dextral strike-slip
systems in a North-Northeast direaction transcurrent to
the sinestral antiethic fault in a North - West direction.
When applying the PDIM on the study area, block 28, it
gives high value at the Westside for the high structure
near the Pastaza and Illocullin Rivers. This result
indicates a great possiblity that oil concentrations can be
found in these fractured zones through prospections.
Areas with high values of intersection density are found in
the Arajuno River, which starts in the center of block 28
and heads towards its Northeast and Southeast corners.
Finally, this proposed methodology is considered an
important improvement to predict the possible location of
high structures, and in relation possible oil reservoirs, by
means of geological lineament identification using remote
sensing images and GIS.
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Map 1: Location of oil explotation blocks in Ecuador Map
2: SAR Radar image of the study area Map
3: Geological lineamentas and intersections
Map 4: Density isolines
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