济源凹陷油源追踪及烃类垂直运移作用

济源凹陷为一中、新生代复合型断陷．下第三系原油为轻质、低硫原油，与下伏中生界（Ｔｔ－Ｊ２）湖沼相生油岩抽提物具有同源性，而与下第三系泥岩抽提物回然相异。后邓断裂是烃类垂直运移的良好通道，中生界生成的烃类沿断裂经过了约３０００－４０００ｍ的垂直运移而聚集成芷。长距离的垂直运移造成了原油中ｒ－蜡烷的富集，作为运移通道的断裂发育时间、规模等控制了浅层油芷的分布．

The Origin of Oil Source and Vertical Migration of Hydrocarbon in Jiyuan Sag

Jiyuan is a composite fault depression of the Mesozoic and Cenozoic. The light crude oil from Tertiary which has little sulphur has the same origin as the extractions of the source rock in Mesozoic(T3-J2)but obviously differs from the extractions from the Tertiary shale. Houdeng fault was considered as a good pathway for the vertical migration of hydrocarbon and the hydrocarbon formed in Mesozoic source rock migrated about 3000～4000m through the fault and accumUlated in Tertiary traps. The vertical migration of long distance led to the abundance of r-wax paraffin and the distribution of oil reservoir in shallow layers. The development period and scale of the fault controlled the distribution of the reservoir.