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Exploration
Exploration
Oil exploration is an expensive, high-risk operation. Although exploration technology has advanced significantly since 1897, geologists still have only about a 10% success rate in identifying new fields. A series of methods are used to try and locate new reserves of oil on and off shore. The first is visual: surface features and terrain are examined with the naked eye, aerial photographs, and
satellite images
to determine if conditions are likely. Surveys are then carried out, usually including
gravity surveys
and
magnetic surveys
. Even electronic noses, known as
sniffers
, are used to try and detect the smell of hydrocarbons. If an area appears to be a good prospect, then a more detailed
seismic survey
is usually carried out. Once a prospective oil strike is found, the location is marked by
GPS coordinates
on land or by marker buoys on water. Finally, an exploration well is drilled to conclusively determine the presence or absence of oil.