塔木察格盆地南贝尔凹陷东次凹构造转换带与油气成藏关系

塔木察格盆地位于蒙古国东部,与中国的海拉尔盆地同属一个盆地,为叠置于兴蒙造山带之上的拉张一挤压型中新生代陆相断陷盆地.南贝尔凹陷位于海拉尔一塔木察格盆地中部断陷带的中部,面积为3 200 km2.南贝尔凹陷东次凹南一北洼槽构造转换带位于南贝尔凹陷东次凹中部,为反向聚敛叠覆型构造转换带,是重要的含油气构造带.转换带对油气...

Structural transfer zones and its relationship of petroleum migration and accumulation of the east sub-sag in South Buir sag,Tamsag Basin

Tamsag Basin is located in the eastern part of Mongolia and belongs to the same basin with Halaer Basin of China，is extensional compressional Meso Cenozoic continental rifted basin superimposed on Mongolia Hinggan orogenic belt.South Buir sag of 3200 km2 is located in the central of central rifted belt of Halaer Tamsag Basin.South north sub sag structural transfer zones of South Buir sag is located in the middle of east sub sag of South Buir sag and is a convergent overlapping structural transfer zones and the important oil bearing structural belt.The effect of the zone to hydrocarbon accumulation exists in the whole reservoir forming process.The transfer zone may form structures or traps that are prone to hydrocarbon migration and accumulation.It controls the distribution of organism rich sediments or sand bodies by dividing the depositional area into isolated sub sags.The dense faults in the zone provide conduit for hydrocarbon migration and accumulation.Petroleum migration and accumulation of east sub sag of South Buir sag is controlled in the south north sub sag structural transfer zones which confined the distribution of the sedimentary system，favorable reservoir sandstones and effective structural traps.The discovery reservoir is related to the south north sub sag structural transfer zones of South Buir sag.