摘要
东西伯利亚盆地是一个古老的地台型含油气盆地，经历了4个沉积构造演化阶段，其中基底形成阶段和同生裂谷早期阶段为盆地的孕育期，同生裂谷晚期阶段和被动边缘早期阶段为盆地烃源岩的沉积期，被动边缘阶段为盆地内储层和盖层的发育期，碰撞挤压阶段为盆地内部构造格局变化以及油砂成矿的关键期。丰富的油源、良好的储集条件、充足的油气远距离运移动力、畅通的疏导体系及烃类降解稠化等多种因素综合作用，促使东西伯利亚盆地形成规模化油砂资源。根据油砂的成矿机理，该盆地分为斜坡降解型和古油藏破坏型2种成矿模式，初步预测油砂资源为23380亿桶。
East Siberian Basin is an ancient platform-type petroleum-bearing basin and Undergoes four phases in sedimentary structural evolution： basement-forming stage and early-stage syn-rifl are happened in the gestation periods of the basin; late-stage syn-rift and early-stage passive continental margin are the depositing periods of the source rocks; the passive continental margin stage becomes the developing period of the reservoirs and cap rocks; the collisional-compressional stage belongs to the key periods of the change of the inner structure frames and the for- mation of the oil sand deposit. The comprehensive action of diverse factors such as abundant oil resources, much better accomulating conditions, adequate driving force for long-distance hydrocarbon migration, smooth conducting system, hydrocarbon degradation-densification and so on are beneficial to the generation of large-size oil sand reserves in the basin. According to the forming principles of oil sand deposit, there are two kinds of deposit forming models ： slope degradation and ancient oil reservoir damage, the oil sand resources are preliminarily predicted to be 23 380×10^8bbl.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2012年第5期34-39,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
中国石油天然气集团公司基金项目“全球非常规油气资源评价”（2008E--0502）.
关键词
东西伯利亚盆地
地质特征
油砂
成矿条件
成矿模式
资源潜力
East Siberian Basin
geological characteristic
oil sand
reservoir forming condition
reservoir formingmodel
resources potential
