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川东石炭系是四川盆地的主要产气层,渝东地区石炭系研究程度较低,勘探工作进展缓慢。通过对地层、层序和沉积相的研究,总结出渝东地区石炭系地层的展布特征、层序特征、沉积相类型与分布特征,以及重点层位沉积相的控制因素。研究认为:渝东地区石炭系整体沉积较薄,地层具有东薄西厚、南薄北厚的特征,沉积自下而上是一个海侵过程,沉积地貌由早期的东低西高、北低南高,逐渐过渡到晚期的西低东高、南低北高,有利沉积相带为颗粒滩,主要受由鄂西海而来的潮汐沟道控制。
Carboniferous in eastern Sichuan is the main gas producing layer in Sichuan Basin. Carboniferous in eastern Chongqing has a low degree of research and exploration progress is slow. Through the study of stratigraphy, sequence and sedimentary facies, the distribution characteristics, sequence features, type and distribution of sedimentary facies and the controlling factors of sedimentary facies in key strata are summarized. It is concluded that the sediments of the Carboniferous in eastern Chongqing are relatively thin, and the strata have the characteristics of thin east-west-thick and south-thin north-thick. Sedimentation is a transgressive process from the bottom to the top. The sedimentary topography gradually changes from low in the west to low in the east, low in the north and low in the south To the late West Low East, South low north, favorable sedimentary facies as a granular beach, mainly by the tidal channel from the western Hubei sea control.