摘要
羌塘盆地与油气资源丰富的特提斯域西段具有类似的构造沉积演化特征和石油地质条件,隆鄂尼—昂达尔错古油藏带的发现不仅证实了盆地存在大规模油气聚集成藏过程,而且显示盆地砂糖状白云岩储层可能具有良好的油气勘探前景。以青藏高原羌南坳陷布曲组地表油藏带作为了解羌塘盆地油气成藏过程的窗口,通过精细的剖面控制油藏带含油层,利用含油层距布曲组顶底岩性转换界面垂直距离作为含油层对比标志,查明油藏带含油层并非同一层位,其层位在区域上表现为东高西低的分布特征,进一步明确了羌南坳陷油气勘探的目标层位,同时意味着羌南坳陷布曲组整套地层经历过油气运移和充注过程,而储层的有效性决定了油气的富集与成藏过程。盆地含油层空间分布特征表明:在有利封盖条件下,有利储集相带发育地区将会取得油气勘探突破。
The tectono-sedimentary evolution characteristics and petroleum geological conditions of Qiang- tang Basin are the same as those of the western Tethys which contains abundant oil and gas. The discovery of the Longeni-Angdaercuo oil reservoir belt not only confirmed the process of massive hydrocarbon accu- mulation in Qiangtang Basin, but also displayed the good exploration prospects in dolomite reservoirs. Ac- cording to the surface oil reservoir of Buqu Formation in the south Qiangtang Basin and refined section con- trol, combined with the vertical distance of the oil-layer and the lithology conversion interface in top and bottom as the oil-layer correlation marker, the oil-bearing-formations of the oil-reservoir are found not to be in the the same layer. The reservoir exhibits the characteristic of ＂high in the east and low in the west＂, which further confirms oil-exploration target horizon in the south Qiangtang Basin. It also confirms hydro- carbon migration and infill-injection of Buqu Formation in the south Qiangtang Basin. Reservoir effective- ness decided the process of oil-gas enrichment and accumulation. The distribution characteristics of oil- space in the basin shows that： the area with favorable reservoir faces belt will benefit the oil-gas explora- tion breakthrough under the condition of favorable blocks.
出处
《地质科技情报》
CAS
CSCD
北大核心
2016年第1期74-79,共6页
Geological Science and Technology Information
基金
中国地质调查局地质调查项目(12120115000901)
国土资源部沉积盆地与油气资源重点实验室开放基金项目(zdsys2014002)
关键词
砂糖状白云岩
油藏带
油气勘探
布曲组
羌塘盆地
青藏高原
saccharoidal dolostone
oil reservoir belt
oil and gas exploration
Buqu Formation
QiangtangBasin
Qinghai-Tibet Plateau
