川西坳陷中部古隆起形成演化过程及其控油气作用  

FORMATION AND EVOLUTION OF PALAEOHIGHS IN CENTRAL WEST SICHUAN DEPRESSION AND THEIR CONTROLS ON OIL AND GAS

作　　者：李林涛[1,2] 朱光辉 熊亮[3] 

机构地区：[1]中海油研究总院 [2]中国石油大学(北京) [3]中国石化西南油气分公司勘探开发研究院

出　　处：《天然气勘探与开发》2012年第3期5-8,81,共4页Natural Gas Exploration and Development

基　　金：国家科技重大砖项(2011ZX05030-002)"孟家拉湾及澳大利亚北陆架富油气盆地勘探潜力综合评价与目标优选"

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。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.

关 键 词：川西坳陷 古隆起 形成 演化 控油气作用 

分 类 号：P618.13[天文地球—矿床学]