About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 30 (1946)

Issue: 12. (December)

First Page: 2089

Last Page: 2089

Title: Time of Oil and Gas Accumulation: ABSTRACT

Author(s): A. I. Levorsen

Article Type: Meeting abstract

Abstract:

A perplexing problem in petroleum geology is whether the oil and gas originate at or very near the point of accumulation, or whether they have migrated in from some distant area of origin. Examples of both in situ and distant origin can be cited that seem to indicate both occur in nature.

For those pools which seem to indicate migration from a distant source, a rough guide as to the time of the accumulation is offered. It is based on the timing of the formation of the trap into which the oil and gas accumulate--the accumulation cannot occur before the trap is formed. In considering the interval between the time of formation of the reservoir rock and the present time, most producing traps can be separated into the varying component elements which go to make up the trap as it now exists. Examples of different combinations of trapmaking events are given as a guide to the time before which accumulation could not have occurred. Furthermore, the capacity of a trap is in part a function of the depth of burial of the reservoir--a phenomenon which also supports a relatively lat accumulation of many pools.

End_of_Article - Last_Page 2089------------

Copyright 1997 American Association of Petroleum Geologists