When the government awards an operating company a licence to
explore for oil and gas within a specified area of the North Sea,
the company gathers data to determine whether there are likely to
be any oil and/or gas deposits deep below the seabed. The initial
stages of surveying the area will focus on building up a picture
of the areas above and beneath the seabed. Later in the process
of exploration, more detailed and precise data will be required
of the potential site.
There are many methods of surveying, all of which help to build
up the picture of the rock formations below the seabed. Magnetic
surveying examines the force of gravity along the seabed, satellite
surveying provides aerial pictures, and seismic surveying gives
more detailed views of the buried rock formations by the use of
sound waves that reflect off the different rock layers.
The geologist will use the seismic data to reconstruct the subsurface
configuration to locate possible sites of oil traps. As the oil
is found within porous rock they will also calculate the percentage
of oil that could possibly be extracted from the reservoir. The
geologist will work closely with the geophysicist.
The geophysicist will interpret the seismic data and build up
the picture of the subsurface by using his or her knowledge of the
past changes in the earth's structure. The geophysicist will work
closely with the geologist.
Current geoscience jobs
Current geophysics jobs
Current geologist jobs
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