New Aspects to Vertical Gas Migration Zones in the Northern Part of West Siberia

P517 NEW ASPECTS OF VERTICAL GAS MIGRATION ZONES IN THE NORTHERN PART OF WEST SIBERIA R.M. GATAULIN Basheneftegeofizika 3 Luganskaya Ufa 450071 Bashkortostan Russia Summary 1 Many various hypotheses of hydrocarbon genesis and accumulation in super giant gas/condensate/oil fields in the northern part of West Siberia (the Yamburg gas/condensate field for example) are well known. Generally all research was related to shallow Aptian-Albian-Cenomanian (Pokur Formation) reservoirs. Some scientists regard aspects of: biogenic mechanism (CO2 reduction) or low maturity thermogenic model or both together. Others suggest deep origin of Cenomanian gas from Jurassic Triassic and Upper Paleozoic source rock. Author supports