石油学报 ›› 1989, Vol. 10 ›› Issue (2): 9-18.DOI: 10.7623/syxb198902002

• 地质勘探 • 上一篇    下一篇

渤海湾断陷湖盆几类重要砂体的地震反射特征及沉积相模式

瞿杰   

  1. 石油地球物理勘探局
  • 收稿日期:1986-12-20 出版日期:1989-04-25 发布日期:2013-07-08

THE SEISMIC REFLECTORY CHARACTERISTICS OF SAND BODIES IN THE FAULT-SUBCIDED LAKE BASIN IN BOHAI BAY AND THEIR DEPOSITIONAL PHASES

Qu Jie   

  1. Geophysical Exploration Bureau, Ministuy of Petroleum Industry
  • Received:1986-12-20 Online:1989-04-25 Published:2013-07-08

摘要: 在中国东部地区的众多断陷湖盆内,发育了各种类型砂岩储集体,这些储集体的分布具有其特定的规律性.本文较系统地总结了渤海湾断陷湖盆沉积体系分布发育特征,介绍了冲积扇、三角洲、河道、浊积砂体的地震反射特征,并对这几类主要砂体沉积模式及分类进行了初步划分.

关键词: 地震反射特征, 三角洲平原, 断陷湖盆, 冲积扇, 沉积相模式, 前积反射结构, 地震剖面, 渤海湾, 浊积砂体, 发育特征

Abstract: Various types of sand bodies were developed in many faulted lake basins in the east part of China.This paper summarizes systematically the seismic reflection configurations of sand bodies such as alluvial fan,delta,channel sands,turbidites and so on.Alluvial fan,in terms of their distributions and reflection configurations,can be classified into four types:wedgeshaped fan against the cliff,mound -like fan near the cliff,fan parallel to the cliff and slope fan,including eight kinds of configurations,namely,cliffwedged,cliff-bead-string cliff-mound,reflection-free configuration parallel to the cliff,slope-wedge and slope-mound reflection configurations,etc.Delta can be grouped into elongated delta and fan delta two types.The elongated delta exhibits two progradational reflection configurations:low-angle sigmoid and tangent-oblique configurations.Fan delta exhibits three progradational reflection configurations:high-angle sigmoid,parallel-oblique and oblique configuration.Channel sand can be classified into semi-lens and linear sand body,including three kinds of reflection configurations.Turbidites are classified into two types which are associated with delta and alluvial fan having their own reflection configuration respectively.The distribution of these sand bodies has their specific regularities.Alluvial fan and fan delta are developed at the steep side of the lake basin;delta developed along the long axes of basins,small alluvial fan and delta developed along the gentle slope of the lake basin and associated with sand bars along the shore.Deep-water fans and lens-like turbidites are developed in the deep water environment of the lake basin.