What is crude oil exploration?

Crude oil exploration depth where it find?

• Answer:

  I believe you are asking about the depths of exploratory wells. The average depth of all exploratory wells was 6006 ft in 2005 in the US. See: http://tonto.eia.doe.gov/dnav/pet/pet_crd_welldep_s1_a.htm This average depth should not be interpreted as the depth where oil can be found as the range of depths is enormous. Also, in some areas wells can have multiple producing zones, so the well is drilled through to the deepest zone. Field depths can vary from a couple hundred feet to over 20,000 ft depths. Generally very deep wells tend to produce gas rather than oil due to the reservoir temperature. The information from the EIA shows a trend in the last few years of drilling deeper wells. Unfortunately, EIA data goes only up to 2005. The deepest well was drilled to 38,000 ft. See: http://tonto.eia.doe.gov/dnav/pet/pet_crd_welldep_s1_a.htm