断陷盆地陡坡带砂砾岩扇体地震反射特征--以东营凹陷为例

针对陆相断陷盆地陡坡带发育的砂砾岩扇体油气藏具有成因类型多、形态各异、岩性变化大、地震识别和描述困难的特点,主要从陡坡带砂砾岩扇体的类型和沉积特征研究入手,分析了大量的实际地震资料,总结出了陡坡带冲积扇、近岸水下扇、扇三角洲和近源浊积扇4种类型砂砾岩扇体的地震相特征及地震波传播速度、振幅、频率、相干性等地震属性特征;根据其地震特征建立的地震识别模式在东营凹陷陡坡带砂砾岩扇体的油气藏勘探中取得了良好的应用效果.

Seismic Reflection Feature of Glutenite Fan in Abrupt Slope Zone of Rift-Subsidence Lake Basin:A Case in Dongying Depression

The glutenite fan reservoir developed in abrupt slope region of faulted basin has become a main prospecting objective in continental facies faulted basin. It is difficult to identify and describe such reservoir because of its many origin types, different forms, and acute lithological changes. The study on glutenite types and sediment features in abrupt slope region and analysis of a lot of real data verifies and summarizes the seismic features of glutenite fans:abrupt slope region alluvial fan,in shore underwater fan,fan delta and near source turbidite. These features include many seismic attributes such as seismic facies, seismic wave velocity,amplitude,frequency,coherence etc. The good application effect has been acquired for oil and gas exploration in abrupt slope region glutenite fan of Dongying Depression.