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通过地质和物探手段相结合 ,宏观和微观方法相结合 ,对渤南洼陷构造发育特征和沙四上段沉积相特征进行了深入的研究。根据沉积旋回性、韵律性等特征 ,确定渤南洼陷沙四上段沉积环境为滨 (浅 )湖—半深湖和湖底扇。根据沉积学标志 ,测井相标志和地震相标志 ,对沙四上段湖底扇沉积微相进行了详细划分和描述 ,将湖底扇划分为内扇、中扇和外扇 3个亚相 ,并进一步划分为 5个微相。在上述基础上 ,揭示了湖底扇的平面展布规律 ,建立了沙四上段湖底扇的沉积模式
Through the combination of geologic and geophysical methods and macroscopic and microscopic methods, the tectonic development characteristics of Bonan depression and the sedimentary facies of Upper Shahejie Formation are studied in depth. According to the characteristics of sedimentary cycle and rhythm, the sedimentary environment of upper Es4 in Bonan Sag is determined to be shallow lake, semi-deep lake and sublacustrine fan. According to sedimentology signs, log facies marks and seismic facies signs, the sedimentary microfacies of the sub-bottom fan in the upper Shahejie Formation are described and described in detail. The sublacustrine fan is divided into three subfacies of inner fan, middle fan and outer fan and further Divided into 5 micro-phase. On the basis of the above, the plane distribution law of the sublacustrine fan was revealed, and the sedimentary model of the sublacustrine fan