焉耆盆地博湖坳陷油气成藏的主控因素及成藏模式

通过对焉耆盆地中生代原型盆地的形成与演化研究，将其划分为中、晚三叠世断陷形成亚阶段、早侏罗世早期-中侏罗世早期断陷扩展亚阶段、中侏罗世中期-晚侏罗世晚期萎缩衰亡亚阶段，指出第二阶段对油气形成起重要作用。分析认为烃源岩条件、盖层及储盖组合、圈闭类型、断层的封堵性及优势输导体系是油气成藏的主控因素。烃源岩演化、储集层自生伊利石年代学分析、矿物流体包裹体均-温度分析结果表明，盆地有两次重要的油气运移和成藏时期。油气成藏有宝浪苏木构造带、种马场构造带、博南鼻状构造带三种主要成藏模式。

MAIN CONTROL FACTORS AND MODELS OF POOL FORMATION IN BOHU DEPRESSION ,YANQI BASIN

By the study on the formation and evolution of Mesozoic prototype,Yanqi Basin could be subdivided into three stages,which are Middle and Late-Triassic faulted formation stage,Early period of Early-Jurassic-Early period of Middle-Jurassic faulted expanded stage and Middle period of Middle-Jurassic-Late period of Late-Jurassic stage.The second stage plays an important role for Hydrocarbon formation.The analysis shows that the main control factors of oil and gas pool formation are the condition of source rocks,cap and reservoir-cap assemblage,trap type,sealing of faults and predominant output series.The analysis on the evolution of source rocks,the isotope of reservoir authigenous chilkinite and homogenization temperature of mineral inclusion shows that there are two important periods of hydrocarbon migration and accumulation.The models of oil and gas pool formation are as follows,Baolangsumu tectonic belt,Zhongmachang tectonic belt and Bonan tectonic belt.