石油物探2024，Vol.63Issue(4)：890-896,7.DOI:10.12431/issn.1000-1441.2024.63.04.017
地震沉积学中90°相位转换技术适用性的讨论
A discussion on applicability of 90° phase shift in seismic sedimentology
摘要
Abstract
The approach of 90°phase shift has been espoused as one of the core techniques in seismic-based sedimentology since 1998,when systematic researches were launched on the theories and application techniques of seismic-based sedimentology.How-ever,its practical implementation is unsatisfactory.According to the philosophy of seismic prospecting,seismic events represent stratigraphic interfaces with impedance contrasts.The practice of 90° phase shift is intended to transform interfacial events into rock formations.Subsurface complexities often show as frequently interbedded thin layers,the interfaces of which could not be one-to-one correlated with seismic reflections as per forward modeling.This means that a reflection is the combination of seismic re-sponses from a certain number of thin layers.Due to the limitation of seismic resolution,the operation of 90° phase shift cannot convert seismic data from interfacial events into lithologic sections;besides,such an operation is geologically meaningless and can-not yield good results for structure and lithology interpretation.Consequently,it may not be treated as a key technique in the study of seismic-based sedimentology,as it neither improves resolving power of seismic data nor yields lithologic sections from seismic sections.关键词
地震沉积学/90°相位转换/道积分/地震正演模拟/同相轴Key words
seismic sedimentology/90° phase shift/trace integration/seismic forward modeling/event分类
天文与地球科学引用本文复制引用
章学刚,杨飞,左中航,汪勇..地震沉积学中90°相位转换技术适用性的讨论[J].石油物探,2024,63(4):890-896,7.基金项目
联合基金重点项目"江汉盆地古近纪卤水型锂铷铯关键金属矿床成矿作用与找矿预测"(U20A2092)资助.This research is financially supported by the Joint Fund Key Projects(Grant No.U20A2092). （U20A2092）
