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offshore prospectingclick to hear

Vibrations from an exploding charge in the sea are used to locate oil deposits; prospecting offshore is more difficult than on land.
offshore prospecting petroleum trap blasting charge seismographic recording shock wave

petroleum trap click to hear

Assemblage of porous rocks that contain recoverable oil reserves, which are produced from marine or land deposits.

blasting charge click to hear

Quantity of explosives (substances capable of discharging high-temperature gases over a very short time period) that produce shock waves when detonated.

seismographic recording click to hear

A recording made using an apparatus called a seismograph; the analysis of its shock wave echoes detects the presence of rock layers that might contain pockets of petroleum or gas.

shock wave click to hear

The shock wave spreads and sends back an echo, which varies with the density and depth of the layers of subsoil; with this information, the composition of the subsoil can be determined.