特种油气藏2024，Vol.31Issue(4)：36-43,8.DOI:10.3969/j.issn.1006-6535.2024.04.005
地震正演在深水沉积地层研究中的应用
Application of Seismic Forward Modeling in the Study of Deep-water Sedimentary Formation
摘要
Abstract
To improve the seismic interpretation accuracy and seismic data information extraction capacity of deep-water sedimentary formation,seismic forward modeling was conducted on the slope deposits with canyons.The seis-mic reflection characteristics of cleuch,channels and canyons dominated by turbidity flow and block transposition are analyzed.The fine forward modeling of the natural levee complex of channels is carried out.The comprehensive analysis suggests that the width-depth ratio of the cleuch dominated by block transport is low and symmetrically filled,and the interior is mainly chaotic weak amplitude reflections.While the canyons dominated by turbidity flow has a large width and depth,the interior of which is an undulating high amplitude reflections;the smaller the angle between the top and bottom interfaces of the formation,the greater the error between the true pinch-out point and the seismic reflection pinch-out point;the decrease in thickness of the natural levee complex of channels results in a lower seismic reflection frequency and enhanced amplitude;the amplitude of the channel when it is saturated with water is stronger than that when it is saturated with gas.Hence the seismic response characteristics of multi-type deep-water sedimentary bodies with different morphological attributes are further clarified,which can effectively improve the accuracy of comprehensive interpretation of seismic data in deep-water sedimentary formations.关键词
深水沉积地层/沟谷/水道天然堤复合体/地震正演/地震解释Key words
deep-water sedimentary formation/cleuch/natural levee complex of channels/seismic forward model-ing/seismic interpretation分类
能源科技引用本文复制引用
沈向存,范伟峰,姜忠正,罗少辉,郭伟,万力..地震正演在深水沉积地层研究中的应用[J].特种油气藏,2024,31(4):36-43,8.基金项目
中国石化科研项目"塔里木盆地陆相天然气富集规律与目标优选"(P20063-3) （P20063-3）
