【摘要】 惠州凹陷珠海组沉积时期,海侵自西南方向进入凹陷,潮流对来自西北方向的古珠江三角洲沉积物有强烈改造作用,在凹陷西南部形成近海潮汐沉积,研究区以潮坪沉积作用为主。运用高分辨率层序地层学原理分析了A/S值变化过程中潮汐相的沉积学与地层学响应,以岩心、测井资料为基础,对珠海组进行了高频基准面旋回划分。在时间地层单元格架内,以潮汐相沉积模式为指导,以井—震界面标定与追踪后的三维数据体为基础,运用地震沉积学分析方法和地层切片技术,优选地震属性,对研究区储层分布进行了预测,分析了其时空演化特征,为该区油气勘探与开发提供了依据。更多还原

【Abstract】 During the period of Zhuhai Formation deposition in Huizhou depression,marine transgression from the southwest seaway entered the depression.The sediments supplied by Paleo-Pearl River Delta from the northwest in this area were transformed by tidal current and then offshore tidal deposits were formed.Tidal flat sedimentation was dominated in Block A of the study area.Using high-resolution sequence stratigraphy principle,medium-scale stratigraphic cycles which response to base-level cycles are recognized in Zhuhai Formation by the analysis of sedimentological and stratigraphic responses to A/S value changes based on cores and well logs.With the guidance of tidal deposition model,tidal reservoir sandstones are predicted in chronostratigraphic framework by using seismo-sedimentological analysis methods and stratigraphic slice technology,optimization of seismic attributes based on 3-D seismic data in the study area,which provides more evidences for oil and gas exploration and development in this Block.更多还原