阿姆达林盆地含油气系统划分与评价

Classification and assessment of petroleum system in Amu-Daria Basin

根据对阿姆达林盆地烃源岩、储集层、油气运移和烃类特征的研究,应用含油气系统理论,将盆地划分为3个含油气系统:中、下侏罗统含油气系统,上侏罗统含油气系统和下白垩统含油气系统。中、下侏罗统含油气系统和上侏罗统含油气系统分别有3个和4个有效烃源区,并相应划分为3个和4个亚含油气系统。基于对烃源区分布、储集层特征、构造格局的研究和油-岩对比,划定了含油气系统分布范围,认为中、下侏罗统含油气系统最有勘探潜力,上侏罗统含油气系统有较大的勘探潜力,下白垩统含油气系统勘探程度低亦有一定勘探潜力。

The petroleum potential and distribution of Ainu Daria Basin are studied based on the theory of petroleum system. According to the eras of source rock strata, the Amu-Daria Basin is divided into three petroleum systems, i.e. Lower-Middle Jurassic, Upper Jurassic and Lower Cretaceous petroleum systems. The Lower-Middle Jurassic and Upper Jurassic petroleum systems have three and four active source areas respectively, which are correspondingly divided into three or four sub-petroleum systems. The boundaries of these petroleum systems are divided based on the analysis of distribution of source areas, reservoir characteristics, structural framework and oil-rock correlation. In terms of exploration potential, the Lower-Middle Jurassic petroleum system is the greatest one, the Upper Jurassic petroleum system is relatively hig, and the Lower Cretaceous petroleum system is small but also has a certain potential.