地震相似背景分离技术在东营凹陷的应用

<title>plication of separation technology in seismic similar background to Dongying sag.

东营凹陷南坡沙四段滩坝砂体一般呈现泥包砂特点,砂岩含量为10％-50％,单砂体厚度较薄,横向连续性差,纵向上层多且薄,常夹有白云质或灰质地层,用一般的地球物理储层描述方法难以确定储层分布。应用基于相似背景的分离技术能够在地震资料上揭示出更多的薄层反射特征,详细地显示出横向的细微变化,突出有效波信息,使该地区沙四段滩坝砂体的勘探取得了较大进展。

<abstract>e beach -bar sandbodies of the Es4 in the south slope of Dongying sag have the sand-in-mud characteristic. The sandstone content varies from 10% to 50%. The thickness of single sandbody is small with poor lateral communication, and there are multiple layers deposited vertically with intercalated dolomite or calcareous beds. Conventional geophysical reservoir description methods are difficult to determine the distribution of such kind of reservoirs. Separation technology based on similar background can reveal more reflecting features of thin layers on seismic profile; can display the lateral variation in detail and can accentuate the information from effective wave. The application of this technology has developed the exploration of Es4 beach -bar sandbodies in this area.