Abstract

In an attempt to evaulate the hypothesis that petroleum formation can be simulated using high temperatures, Green River Shale from Colorado, U.S.A., was subjected to closed-system pyrolysis for 16 hr at temperatures ranging from 300 to 500°C. Variations in the pyrolysis products (gases, volatile liquids, and organics extracts) over this temperature range duplicate the variations observed in many in situ studies of petroleum maturation. The sequence of products formed over this temperature range was used to define five different zones of maturation reactions: (1) a heterobond cracking zone; (2) a labile carbon bond cracking zone; (3) a free radical synthesis zone; (4) a wet gas formation zone; and (5) a dry gas formation zone. This high temperature simulation of maturation can be used to test other factors in petroleum formation such as mineral catalysis.

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