【摘要】 根据地层基准面旋回原理,通过对地质、钻井、测井及地震等资料的综合分析,将吐哈盆地山前带的侏罗系地层划分为8个长期地层旋回(相当于三级层序)。在层序划分和建立层序地层对比格架、明确沉积主控因素的前提下,在研究区开展了以三级层序为单元的沉积体系展布及空间演化特征分析,得出研究区中侏罗统沉积体系演化经历了3个比较明显的演化阶段。更多还原

【Abstract】 According to the principles of stratigraphic datum cycle,eight long-term stratigraphic cycles(corresponding to sequences of Grade Ⅲ) are recognized in Jurassic strata in Bogeba foreland basin through comprehensive analyses of the geologic,drilling,logging and seismic data.Based on sequence division and stratigraphic correlation and the principal control factor of the middle Bogeba foreland basin can be ascertained,the distribution and evolution of sedimentary system in the study area is analyzed,draw the conclusion that the evolution of the Middle Jurassic in the study area through three relatively distinct phases.更多还原