新疆塔里木盆地北部原油运移地球化学效应

GEOCHEMICAL EFFECTS OF CRUDE OIL MIGRATION IN THE NORTH TARIM BASIN, XINJIANG

钱志浩 曹寅

QIAN Zhi-hao CAO Yin

中国石化无锡实验地质研究所, 江苏无锡 214151

Waxi Research Institute of Experimental Geology, SINOPEC, Wuxi, Jiangsu 214151, China

文中提出的6个新的原油轻烃指纹运移参数以及轻重烃、生物标志物等其它运移参数,应用于塔北地区原油运移地球化学效应的研究,取得了一定成效。海西晚期生成的油气在运移指标上都反映与奥陶系源岩有关,应是沿着海西不整合面大规模由阿瓦提和满加尔坳陷的油源区向北侧向运移到沙雅隆起的产物。而喜山期生成的油气其运移指标不仅反映与奥陶系源岩有关,也与三叠-侏罗系源岩有一定关系。它也能接受北面库车坳陷向南侧向运移的陆相油气。

Some successes were achieved when six new migration parameters of light hydrocarbon fingerprints for crude oil as well as lighter heavy hydrocarbon, biomarkers and other migration parameters were applied to the geochemical effect study of crude oil migration in North Tarim area. The hydrocarbon generated in the Late Hercynian is all related to the Ordovician source rocks reflected from its migration indexes. It must be the product of a large scale lateral migration northward along the Hercynian plane of unconformity from the oil source regions of the Awati and Manjiaer Depressions to the Shaya Uplift. The migration indexes show that the hydrocarbon generated in the Himalayan not only is related to the Ordovician source rocks but also has some relations with the Triassic-Jurassic source rocks. It can also accept continental hydrocarbon lateral migration southward from the Kuche Depression on the north.

https://doi.org/10.11781/sysydz200102186