摘要
哥伦比亚普图马约盆地稠油主要分布在盆地东北部,原油为高密度、高黏度、高胶质及高沥青质的稠油。根据普图马约盆地烃源岩特征、原油物性分布、地球化学指标和地层水水型,结合区域地质条件,探讨了该盆地东北部稠油的基本特征和成因模式。研究认为,普图马约盆地稠油的形成属于次生成因,成熟原油在长距离运聚过程中发生生物降解作用,晚期安迪斯构造运动,原生油藏被严重破坏,地层水下渗,油藏遭受水洗和氧化等次生作用进一步发生稠化。
The Crude oil of Putumayo basin in Colombia is characterized by high density,high viscosity,high gel content and high bitumen content and mainly distributed in northeast of the basin.Based on the source rock features of cretaceous formation,distribution of crude property,geochemical indices and formation water type and combined with regional geological conditions,the characteristic and origin of heavy in northeast of Putumayo basin has been discussed.The heavy oil origin of Putumayo basin is secondary heavy oil.Mature oil is biodegraded in the long distance of migration and accumulation.In the later stage,Original oil pool is seriously destroyed by the late Andes orogeny.With the infiltration of fresh water,Original oil pool is further flushed by fresh water and biodegraded.
出处
《新疆石油天然气》
CAS
2016年第4期1-5,共5页
Xinjiang Oil & Gas
