扇三角洲沉积模式及储层地质模型——以辽河断陷锦91块于楼油层为例

Depositional Model and Reservoir Geological Model of Fan Delta——A Case Study on Yulou Oil bearing Sets, Jin 91 Block, Liaohe Fault Basin

应用辽河断陷盆地锦９１块于楼油层的岩心、录井及测井资料，采用过程沉积学方法，进行了沉积学研究。将扇三角洲前缘亚相划分为主体水道、近端砂坝、远端砂坝、砂坝间及前缘重力流沉积等５种沉积微相。主体水道以砂砾岩、含砾砂岩为主，呈正粒序。近端砂坝以含砾砂岩、砂岩为主，与远端砂坝一起构成反粒序。远端砂坝为砂岩、泥岩互层，整体向上变粗。砂坝间沉积以泥岩为主，可夹薄砂层。重力流沉积的典型特征为粗粒砂，砾质沉积物夹在厚层泥质沉积物中。在微相类型及其特征详细研究的基础上，总结了扇三角洲沉积模式及反映储层空间配置关系的地质模型。

Based on geologicial and log data of Yulou oil bearing sets on Jin 91 block of Liaohe fault basin, using depositional process analysis methods, the fan delta sedimentary characteristics have been demonstrated. Main channal,proximal sand bar, distal sand bar, interval zone of sand bar and gravitative deposits have been recongnized. Main channal deposits are characterized by conglomerate, pebbly sandstone and up fine sequence; proximal sand bar consists of pebbly sandstone and sandstone, combined with distal sand bar, forming up coarse sequence; distal sand bar is characterized by interbeded sandstone and mudstone, while interval zone of sand bar deposits are mainly mudstone, and gravitative deposits are coarse deposits developed in thick mudstone. Based on above study, the fan delta depositional model and reservoir geological model have been ottained.