地震沉积学研究现状及进展综述

Current Status and Progress of Seismic Sedimentology

地震沉积学可以定义为:以高精度三维地震资料为基础,以精细沉积学模式为指导,通过综合应用地球物理技术方法,在等时地层格架内研究沉积体系分布特征及其演化的一门学科。在地球物理技术方面,重点介绍了一种新的可以自动追踪所有的等时沉积界面、基于导向体的地层切片生成方法及频谱分解中的时频分析技术。在此基础上指出了地震沉积学的发展趋势,并提出了应用地震沉积学进行沉积、构造和储层的一体化研究,进行有利区带和储层预测的新思路。

Seismic sedimentology is a new edge interdisciplinary subject following seismic stratigraphy and sequence stratigraphy. It is the method system using the united feedback based on high-precision seismic data, modern depositional environment, outcrops paleosedimentary environment model to identify the 3D geometry, the internal structure and deposition process of the sedimentary units. It can be defined as a subject which studies the distribution features of the sedimentary system and its evolution within the isochronous stratigraphic framework based on high precision 3D seismic data, the sedimentology model, and the comprehensive application of geophysical techniques and methods. This paper emphatically introduces the generation method of stratal slicing and the time-frequency analysis technology in frequence decomposition based on steering cube, which can automatically trace all synsedimentary boundaries. In a view of the developing trend of seismic sedimentolgy, it suggests the integrated study of deposition, tectonics, and reservoirs by the application of seisimic sedimentology, and the prediction of favorable facies belt and reservoirs will sure be the new thought in hydrocarbon exploration.