摘要
胶莱盆地为右行非对称性菱形拉分盆地,其西部北北东向边界断裂和东部北东向边界断裂为Y主剪切断裂,南部北东向边界断裂为R剪切断裂,北部北东东-东西向边界断裂为R'剪切断裂。其次级盆地具有与之相似的几何学特征。胶莱盆地构造演化及油气地质特征是:莱阳组沉积期为右行走滑拉分裂谷阶段,是主要的生油岩形成期;莱阳组沉积期末-青山组沉积期初为脉动式左行转换挤压阶段;青山组沉积期为后裂谷阶段,构造裂缝为青山组主要油气储渗空间。青山组沉积期末-王氏组沉积期初为脉动式左行转换挤压阶段;王氏组沉积期为右行走滑拉分裂谷阶段,为早期的莱阳组生油岩主要生烃期;新生代为盆地消亡阶段。
Jiaolai basin is a dextral strike-slip pull-apart basin.Its west and east boundaries are delineat-ed by NNE-trending Tanlu faulting and NE-trending Moping-Jimo faulting,both of which developed as Y-sheared fractures;its south and north boundaries by NE-trending Wulian-Rongcheng faulting developed as R-sheared fracture,while NEE-EW trending faulting developed as R'-sheared fracture.Its subsidiary basin is of geometry characteristics similar to them.The tectonic evolution and petroleum geology are characterized by that①Laiyang period is dextral pull-apart rifting stage mainly formed source rocks;②Late Laiyang-Early Qing-shan period is pulse sinistral transform-compressional stage;③Qingshan period is post-rift stage.Structural crack is the main space of reservoir and percolation of oil and gas in Qingshan formation;④Late Qingshan-Early Wangshi period is pulse sinistral transform-compressional stage;⑤Wangshi period is dextral pull-apart rifting stage,an important hydrocarbon generation stage in Early Laiyang epoch;and(6)its Cenozoic is an up-lift and subduction stage.
出处
《新疆石油地质》
CAS
CSCD
2002年第4期345-347,共3页
Xinjiang Petroleum Geology
