【摘要】 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更多还原

【Abstract】 Detailed studies of structure feature and sedimentary facies of the upper part of the Shasi member in Bonan subsag are carried out by means of the combination of geology and geophysical prospecting,and by the combination of macroexamination and microexamination.It is confirmed that the sedimentary environment of the upper part of the Shasi Member in Bonan subsag is littoral facies,semideep lacustrine facies and sublacustrine fan,on the basis of sedimentary cycle and rhythm characteristics. The authors have studied sedimentary facies of the upper part of the Shasi Member in Bonan subsag, divided sublacustrine fan into inner,middle,outer fan,and further divided them into five microfacies, in the light of sedimentary characteristics ,the marks of logging and seismic facies.The characteristics of the distribution of sublacustrine fan,are presented and the sedimentary pattern of sublacustrine fan is established.更多还原