库车西秋里塔格构造带中、新生代构造演化  

TECTONIC EVOLUTION OF THE WESTERN QIULITAGE TECTONIC BELT IN MESOZOIC AND CENOZOIC,KUQA DEPRESSION

作　　者：汤良杰[1] 万桂梅[1] 王清华[2] 金文正[1] 杨文静[2] 

机构地区：[1]油气资源与探测国家重点实验室 [2]塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《西南石油大学学报（自然科学版）》2008年第2期167-171,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金项目(40672143,40472107,40172076);国家“973”计划项目(2005CB422107,G1999043305);塔里木油田公司项目(41004050009)

摘　　要：根据平衡剖面原理,对经过西秋里塔格构造带的2条地质剖面进行构造复原,利用PRA公司的BasinMod-1D软件对其中的2口井做沉降史分析,结果表明中、新生代的构造演化特征为三叠纪末期发生构造抬升形成古隆起构造,之后的侏罗纪未发生构造沉降,一直处于沉积间断状态,白垩纪早中期发生构造沉降,白垩纪末期库车拗陷整体发生抬升剥蚀,古近纪库姆格列木群沉积期的喜马拉雅早期构造运动强度较弱,苏维依组-康村组沉积期的喜马拉雅中期构造运动强度逐渐增大,到库车组沉积期-第四纪的喜马拉雅晚期构造活动最强烈。盐层的滑脱作用使得盐上、盐下地层变形极不协调,盐上地层缩短量明显大于盐下地层,表现出明显的盐上、盐下分层缩短的特点。To analyze the tectonic evolution characteristics of the western Qiulitage tectonic belt in Mesozoic-Cenozoic,two profiles across the western Qiulitage tectonic belt are restored according to balanced section theory,and BasinMod-1D software of PRA company is used to analyze subsidence history of two wells which are in the western Qiulitage tectonic belt.And then,it is concluded that this belt was uplifted at the end of Triassic,and then was in the situation of interruption in deposition due to no structural subsidence.It subsided duo to structural movement during Early Cretaceous to Middle Cretaceous,and was uplifted and eroded during Late Cretaceous.The Early Himalayan tectonic movement was weak during the deposition stage of Kumugeliemu Formation,Middle Himalayan tectonic movement was intenser during the deposition stage of Suweiyi Formation and Kangcun Formation,and Late Himalayan tectonic movement was the intensest from the deposition stage of Kuche Formation to Quaternary.The deformation of strata above and below salt layer was very incoordinate.Shortening amount of strata above salt layer was more than that of strata below salt layer as a result of decollement function of salt layer.

关 键 词：构造演化 平衡剖面 沉降史 西秋里塔格构造带 库车拗陷 

分 类 号：TE121.1[石油与天然气工程—油气勘探] P242[天文地球—测绘科学与技术]