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古油藏带位于羌塘盆地中央隆起带南部羌南坳陷比隆错 -昂达尔错地区 ,东西长 10 0km ,南北宽 2 0km ,为一狭长湿状油苗群 ,露头上岩石的颜色呈暗褐色、褐灰色 ,为中侏罗统布曲组的白云岩。沉积环境以生物礁组合为主。经对比 ,古油藏油气主要来源于下侏罗统烃源岩。生烃过程模拟反映羌塘盆地有两次生排烃过程 ,第一次发生在 14 0～ 15 0Ma ,第二次发生在 2 0Ma至现今。古油藏带的发现进一步说明了羌塘盆地具有良好的油气远景
The paleo-oil reservoir belt is located in the Billuco-Ondal fault region of the southern Qiangnan Depression in the central uplift zone of the Qiangtang Basin. The paleo-oil reservoir belt is a narrow and long moist oil-sapling population with a length of 10 km from east to west and 20 km of north-south width. Dark brown, brown gray, for the Middle Jurassic Buqu Formation dolomite. Sedimentary environment reef-based combination. By comparison, the oil and gas in the ancient reservoirs mainly come from the Lower Jurassic source rocks. The hydrocarbon generation process simulation shows that there are two processes of hydrocarbon generation and expulsion in the Qiangtang Basin, the first occurring at 14 0 ~ 15 0Ma and the second occurring at 20M till now. The discovery of the paleo-oil reservoir further shows that the Qiangtang Basin has a good hydrocarbon prospect