Anomaly shifts indicate rapid surface seep rates

Steven A. Tedesco Atoka Geochemical Services Corp. Englewood, Colo. Surface geochemistry in petroleum exploration relies on the process of vertical migration. One of the key elements in the theory of vertical migration of hydrocarbons is the rate at which petroleum migrates from the reservoir to surface. The rate of hydrocarbon migration has been subject to debate for a number of years. Several theories have been proposed that cannot adequately explain or quantify the mechanism of vertical migration.1 Some authors have postulated, based on computer modeling and general calculations, that the movement is slow, taking a minimum of 10 years to go only 1,000 ft.2 Ot...

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