--> Abstract: Oil and Gas Traps in the Crystalline Basement: Evidence for Wrench Tectonics, by A. Kitchka; #90942 (1997).

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Abstract: Oil and Gas Traps in the Crystalline Basement: Evidence for Wrench Tectonics

KITCHKA, ALEXANDER

To present time more than 250 oil and gas fields with commercial productivity of the crystalline basement are known worldwide. Among these ones there are several of well-known giants such as Panhandle (Mid-Continent), tandem La-Pas - Mara (Maracaibo), Carmopolis (Sergipe-Alagoas), Clair (west of Shetlands), Augila-Nafoora (Sirt), Oymasha (Manghyshlak), White Tiger (offshore Vietnam) and other mega-accumulations.

A number of oil and gas fields, such as Yulievka and Khukhrya, were recently discovered along the Northern Flank of the Dnieper-Donets riftogenic basin, NW Ukraine.

The case history of the above fields testifies that their discoveries are typically unexpected results of the exploration. There are still no valid criteria of successful prospecting for oil and gas in the basement within the frame of traditional paradigm for the origin of petroleum. Ones believe that the basement level is the deepest and final frontier for oil and gas exploration. However, rather prolific pay zones have been encountered in the deep fractured entrails of some fields in West Siberia 1000 m below the top of the weathered basement. Therefore petroleum geoscientists need to answer where the lowermost limit of petroleum column is.

This study supports an idea about tight genetic links between oil and gas reservoirs in the basement and crushed and mylonitized zones of deep wrench faults.

AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria