Oil and gas are vital to many industries, and important to the maintenance of modern industrial civilization. There is a number of methods used in hydrocarbon detection.
Seismic surveying among others is the most popular and widely used.
-
Seismic reflection is commonly used for mapping subsurface stratigraphy and structures to delineate traps.
-
Well logging gives high-resolution data on rocks and fluids in near-borehole area.
-
Gravity helps to find oil and gas bearing rocks due to their lower density.
-
Magnetics is used to determine geometry and depth of different structures such as basins, faults, folds and salt diapirs.
-
Seismic reflection detects geological traps under seabed level.
-
Marine magnetotellurics (mMT or mCSEM – marine Controlled Source Electro-Magnetics) provides pseudo-direct allocation of hydrocarbons because of resistivity changes over geological traps.
