API VOCATIONAL BOOK 1-1996

$46.15

Vocational Training – Book 1 – Introduction to Oil and Gas Production

Published By	Publication Date	Number of Pages
API	1996	114

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Description

Progress in solving the secrets of the origin and accumu-
lation of petroleum took a giant step forward in 1859 with
the drilling of the first oil well. This initial well was drilled
to a depth of 69 feet. Oil and gas deposits had been encoun-
tered at various locations since ancient times, but these in-
stances were relatively rare in 1859. Today we have widely
accepted geologic theories along with good supporting
evidence that help explain how oil and gas were formed.
Once formed in the sedimentary source beds, the oil and gas
then migrated to other sedimentary rocks where we find
them today. This two-step sequence is the starting place for
this introduction.

Life on earth possibly began hundreds of millions of years
ago in vast seas and inland lakes. This is one of the initial
concepts in developing the current geologic organic theory
of petroleum. These marine areas are thought of as being
reasonably shallow. The hydrogen and carbon material
which makes up the composition of petroleum is presumed
to have come from the decomposed plants and animals that
were living on land and in the sea. It is probable that the
greatest contribution of organic matenal was deposited in a
marine environment rather than a continental environment.
Also, it is believed that the small plant and animal forms
were of more importance than the larger forms as a petro-
leum source.