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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 66 (1982)

Issue: 5. (May)

First Page: 601

Last Page: 601

Title: Origin of Natural Gases, Po Valley Basin: ABSTRACT

Author(s): L. Mattavelli, T. Ricchiuto, D. Grignani, M. Schoell

Article Type: Meeting abstract

Abstract:

Natural gases from productive wells in Po Valley basin have been investigated in order to study their origin. 13C/12C, D/H isotopic ratios and GC analyses have been conducted. Some data on vitrinite reflectance and kerogen composition are also supplied where available.

The gases showed 13C/12C ratios in the range of -73 to -38^pmil and D/H ratios in the range of -210 to -150^pmil.

A first interpretation based on stable isotopes, kerogen composition, maturity, and the geological setting indicates two main processes responsible of gas origin: bacterial (or early diagenetic) and thermogenic. Also, some gases seem to be the result of an interaction between the above mentioned processes.

Data on productive wells are in good agreement with some head-space analyses and with maturity values.

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Copyright 1997 American Association of Petroleum Geologists