乍得Bongor盆地石油地质特征及成藏模式

乍得H区块是中国石油天然气集团公司在海外最大的高风险勘探区块，Bongor盆地是H区块内一个完整的沉积盆地，是受中非剪切带影响发育起来的中-新生代陆内强反转裂谷盆地，经历了早白垩世断陷、晚白垩世强烈抬升反转和新生代统一成盆三大演化阶段。现今的盆地由北向南可划分为北部斜坡、中央坳陷、南部隆起和南部坳陷4个次级构造单元，中央坳陷可以进一步划分为东部、中部和西部凹陷，其中南断北超的中部凹陷为盆地最主要的构造单元。反转和走滑构造是盆地最显著的构造特征。Bongor盆地的生储盖组合以下白垩统为主；油气成藏受断裂和走滑反转构造控制；反转构造带与有利岩相带结合控制了油气富集。

Petroleum geology and a model of hydrocarbon accumulations in the Bongor Basin, the Republic of Chad

The Permit H of the Republic of Chad is the largest high-risky exploration block owned by CNPC in the world.No discovery was made in the Permit H in more than 30-year exploration by some international oil companies.As a Meso-Cenozoic intensively inversed rift basin under the influence of the Central African Shear Zone(CASZ),the Bongor Basin experienced three evolutionary stages,i.e.,rifting stage in early Cretaceous,strong uplift and inversion stage in late Cretaceous and finally basin-forming stage in Ceno...