【摘要】 应用层序地层学分层基础下的沉积学原理,依据各种数据,进行了各级层序单元的识别与划分,在本区识别出扇三角洲相、湖泊相和湖底扇相3类沉积相,进一步划分为8种沉积亚相和16种沉积微相;通过地震相研究及砂体的预测,进行了各层段微相的平面展布特征研究。结果表明研究区主要发育由方正断陷边缘和依汉通断裂向方正断陷中心推进的扇三角洲—湖泊沉积体系。更多还原

【Abstract】 Combined with previous data,every sequence unit in the study area was identified and divided by using theory of sedimentology and sequence stratigraphy.Three sedimentary facies including fan delta face,lake face and sublacustrine fan face were further divided into 8 subfacies and 16 microfacies;we made analysis of flat spreading features of each segment by researching on seismic faces and predicting sand body.It is indicated that it mainly developed fan delta-lacustrine depositional system where direction of material supply was from margin of Fangzheng Fault and Yihantong Fault to the centre of Fangzheng Fault.更多还原