Seismic Exploration
Geophysical surveys can generally be
classified into two categories:
Reconnaissance and Detailed Surveys
Reconnaissance Surveys
Detailed Surveys
They are run to define broad areas of interest
that contain the thick sedimentary layers that have the potential to contain hydrocarbon traps.
The gravity and magnetic surveys
Reconnaissance Surveys
Aeromagnetic Surveys:Magnetic surveys are done from an airplane flying a grid pattern over a large area.
Gravity and magnetic surveys are also frequently done from ships to find sedimentary basins in offshore areas.
Detailed surveys are conducted to locate
individual geologic structures which can then be drilled.
The most common geophysical technique for obtaining the detailed geologic structural
information needed to pick well locations is the Seismic Survey.
Detailed Surveys