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