摘要
本文介绍了准噶尔盆地南缘北部前缘斜坡带的地质概况及构造演化史。在此基础上,对该区带的油气成藏条件进行了分析,认为该区新近系沙湾组油源来源于侏罗系,该储层属于中等一好储层,沙湾组内部发育的泥岩厚度适中、封盖性能好,可作为油气层的盖层。由于不同沉积阶段湖岸线变迁、剥蚀超覆作用在缓坡上形成不同类型的隐蔽圈闭,包括上倾尖灭圈闭、岩性透镜体、地层超覆、地层不整合圈闭、断层—岩性圈闭。综合分析结果认为该区具备良好的油气成藏条件,可以成为一个重要的勘探领域。
The paper introduced the geologic general situation and tectonic evolution history. On that basis, the paper analyzed the oil/gas accumulation condition in the region,and considered that the Neogene Shawan Formation oil source in the region come from Jurassic, which belonged to mediocre-good reservoir; the depth of mudstone developed in interior of Shawan Formation is moderate, which has good sealing property that can be taken as cap of oil/gas reservoir. Since migration of lake strandline,denudation and overlap in different sedimentary stages, the different kinds of subtle traps have been formed in gentle slope, including updip pinchout trap,lithologic lens,stratigraphic overlap, stratigraphic unconformable trap and fault-lithologic trap. According to integrative study,the paper considered the region has good oil/gas accumulation condition,which can become an important exploration field.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2007年第B08期115-117,共3页
Oil Geophysical Prospecting
关键词
准噶尔盆地
油气成藏
勘探前景
Junggar basin,oil/gas accumulation,exploration prospect
