【摘要】 川西坳陷地区自北而南依次分布着:江油—九龙山隆起带、孝泉—丰谷隆起带和邛崃—新津隆起带,这几个隆起带是川西坳陷内主要的古隆起单元,控制着主要构造圈闭与油气的分布。运用地震剖面特征、平衡演化剖面法和地层厚度分析法对川西坳陷中部的孝泉—丰谷古隆起研究发现:孝泉—丰谷古隆起于安县运动期开始具备雏形,印支晚幕运动期得到加强,形成于燕山中幕运动期,喜山运动期全面隆升改造并最终定型。孝泉—丰谷古隆起形成时间早、圈闭与储集条件较周边好,是川西坳陷内最有利的油气聚集单元。更多还原

【Abstract】 There are three palaeohighs distributed over the West Sichuan Depression from the north to the south,including sequentially Jiangyou-Jiulongshan Uplift,Xiaoquan-Fenggu Uplift and Qionglai-Xinjin Uplift.The three ones are the main palaeohighs in the depression,which affect the main structural trap,and oil and gas distribution.In this paper,the Xiaoquan-Fenggu Uplift in the central depression is studied based on seismic-section feature,balanced evolution-section method and formation-thickness analysis.Results show that it originated from Anxian Movement period,and became stronger in later Indo-Chinese Movement period,formed in middle Yanshan Movement period,and finally fell into a pattern in Himalayan Movement period.In generally,it is characterized by early formation time,better trap and reservoir conditions.So,it is the most favorable oil and gas accumulation block in the West Sichuan Depression.更多还原