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Geophysical
prospecting for hydrocarbons we start from the recognition areas newly opened
for hydrocarbon exploration and evaluation of particular structures
potentially containing hydrocarbons:
·
reconnaissance airborne (in
cooperation)
surveys to recognize regional geological setting in specific concession
blocks
· more detailed land gravity, magnetotelluric and magnetic surveys to point out perspective structures
and trace reservoir rock formation, source rock formation and crystalline
basement in a regional scale; particularly magnetotelluric is used as a complementary method to regional seismic for tracing
layers which might be unidentifiable on seismic record, because of a strong
velocity inversion (screening layers above); these two above steps are
essential to design detailed 3D seismic surveys on particular perspective
structures
Geophysical methods we propose above are non invasive, provide
detailed geological information and cost a mere fraction of 3D seismic
surveys, so the profits
resulting from this filtering mechanism is enormous
·
seismic acquisition (in cooperation) and seismic data interpretation
·
detailed gravity (and optional magnetic) and magnetotelluric
2D and 3D surveys at particular
structures potentially containing hydrocarbons; these methods are
complementary to detailed seismic because they trace features
unidentifiable on seismic record (e.g. because of velocity inversion below
screening layers, the presence of low velocity basement indistinguishable
from a layer above)
·
integrated
geophysical-geological interpretation to oil & gas prospecting including any information
available (remote
sensing, gravity, magnetic,
magnetotelluric, seismic and well logging data; this last step is to
evaluate hydrocarbon structures and propose drilling and exploratory wells.
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