【摘要】 丽水凹陷古新统明月峰组充填了一套滨浅海—三角洲砂泥质沉积,是重要的含油气层段。综合分析钻井、测井、地震及古生物资料,应用层序地层学理论,识别出明月峰组三级层序顶底界面、初次海泛面及最大海泛面,以海泛面为界划分低位、水进和高位体系域。根据明月峰组地质结构和地层发育的构造背景,建立了明月峰组层序地层模式,结果表明:明月峰组沉积时期受同沉积断层的控制,丽水凹陷呈现东部陡坡带、中部洼陷带、西部缓坡带的半地堑式构造格架样式。更多还原

【Abstract】 Paleocene Mingyuefeng Formation was filled by shallow sea and deltaic arenaceous pelitic deposit,which is identified as an important oil/gas bearing segment in Lishui sag.By using sequence stratigraphy theory in combination with drilling,logging,seismic and palaeophyte data,the third order sequences of Mingyuefeng Formation,enclosing interface,initial transgression surface and maximum transgression surface were identified.The sequences are classified into low-stand tract,transgression tract and high-stand tract taking the transgression surface as the interfaces.The sequence stratigraphic pattern of Mingyuefeng Formation is established based on its geological structure and structural setting of the strata developing.The result indicates that the deposit process of Mingyuefeng Formation is controlled by growth faults,and the eastern actic region,central low-lying area and western gentle slope of Lishui sag present as half-graben structural framework.更多还原