【摘要】 油区沉积微相的分布规律直接影响地下流体的流动特征,制约着砂体的垂向叠置形式与侧向连通性。以惠州X油区L30油藏为主要描述对象,在区域沉积大背景调研的基础上,利用岩心、薄片、测井资料进行沉积单元的识别及细分,推测X3油田L30砂体为陆架潮流砂脊相。同时,在地震层序格架中追踪砂体,结合地震反演刻画砂体空间展布特征,佐证了潮流砂脊的存在。这一认识解释了X3油田L30油藏压力下降快、边水能量不足的原因,对油藏后期开发有重要的指导意义。更多还原

【Abstract】 The distribution rules of sedimentary microfacies in oil zone can directly affect the flow features of underground fluid,which restricts the vertical stack and lateral communication of sand bodies. Taking L30 reservoir of X oil zone as an example,under the mega-background of regional sedimentation,cores,slices and logging data are used to identify and divide the sedimentary units. It is predicted that L30 sand bodies of X3 Oilfield are featured by tidal sand ridges on continental shelf. Besides,the sand bodies are tracked in seismic sequence framework and the spatial distribution features of sand bodies are characterized with seismic inversion,which proves the existence of tidal sand ridges. The conclusions explain the reasons why pressure dropped fast and energy of edge water was insufficient in L30 reservoir in X3 Oilfield,which is of indicative significance to the reservoir development at the later stage.更多还原