【摘要】 在前人对塔里木盆地深部地层研究的基础之上,利用钻井、新地震资料首次精细刻画了震旦系裂谷发育特征,认为塔里木盆地震旦系受天山洋和昆仑洋裂谷作用控制,发育麦盖提、满加尔、阿瓦提三大坳拉槽和塔北、巴楚-塔中、和田三大古陆,震旦系沉积分为裂陷期和坳陷期两期沉积;分析了震旦系裂谷对油气勘探的指导意义:其一是震旦系裂谷及其继承性沉降作用直接控制了震旦系自身及下寒武统玉尔吐斯烃源岩的分布,其二是震旦系继承性裂谷沉降边缘控制了下寒武统台地边缘相带的分布、继承性古陆控制了下寒武统台地的分布,其三是震旦纪古陆及继承性裂谷边缘发育的寒武系中下统台缘相带共同控制了中寒武统的膏盐岩的分布,其四是塔中寒武系盐下大构造继承发育是有利勘探区带,巴楚和玛东是寒武系盐下勘探的最有利区。更多还原

【Abstract】 Based on the former research of deep formations in Tarim basin,by using drilling and seismic data for the first time,the fine description of Sinian rift valley development characteristics in Tarim basin has been made.It is believed that the Tarim basin in Sinian was controlled by Tianshan Ocean and Kunlun Ocean rifting,three aulacogens(Maigaiti,Manjiaer,and Awati)and three big ancient lands(northern Tarim,Bachu- mid Tarim and Hetian)were developed.The sedimentation of Sinian was divided into chasmic and depression stages.In this article,the guidance of Sinian on hydrocarbon exploration has been analyzed:the first one is that the direct control of Sinian rifting and its successive subsidence on Sinian period itself and the sourcerock of the lower Cambrian Yuertusi formation in Tarim Basin,the second one is that the control of subsidence marginal of successive rifting in Sinian on marginal facies belt of lower Cambrian platform,the successive ancient land on the distribution of the lower Cambrian platform,the third one is that the common control of Sinian ancient land and successive rifting margin on the distribution of Plaster gypsum in Middle Cambrian,and the fourth one is the favorable exploration zone,namely Cambrian pre-salt structure of mid-Tarim basin,while Bachu and Madong are the most favorable area for Cambrian pre-salt exploration.更多还原