东营凹陷滑动及滑塌扇体特征及分布模式

Sliding Slumping Fan Characterization and Distribution Patterns in Dongying Sag

三角洲斜坡带发育大量事件性沉积体,其沉积类型和分布规律尚认识不清的问题。通过岩心描述、测井、地震资料的综合分析,将发育在东营三角洲前缘斜坡上的扇体细分为滑动扇体和滑塌扇体2种。利用地震沉积学方法确定了研究区内滑动、滑塌扇体的演化和分布特征;明确了距离三角洲越近,滑动、滑塌扇体发育程度越高的特点,并据此总结了三角洲前缘滑动、滑塌扇体沉积模式。研究结果可为后期三角洲斜坡扇体勘探提供重要的地质依据。

There are a large number of event sediments in the delta slope zone,and the corresponding classification and distribution patterns need further understanding.Core description,logging,seismic data were comprehensively analyzed to further classify the fan in the delta front slope zone of Dongying Sag into two categories,including sliding fan and slumping fan.Seismic sedimentology method was adopted to determine the evolutions and distribution patterns of the sliding and slumping fans.It is pointed out that the development levels of the sliding and slumping fans indicate an increasing trend with the decrease of distance to the delta.The sedimentary patterns of the sliding and slumping fans were summarized based on this understanding.This research could provide certain geological guidance for the subsequent delta slope fan exploration.