横波勘探在海洋天然气水合物调查中的应用

Application of Seismic Shear Wave Detection in Marine Natural-Gas-Hydrate Exploration

在地震勘探领域,利用纵波(P-w)、横波(S-w)、转换横波(PS-w)进行联合多波勘探已成为近年来的热点。文中主要介绍了将陆上三分量横波勘探方法引入深海天然气水合物勘探工作中所取得的成果。首先介绍横波勘探在陆上地震中的成熟技术和勘探优势,并结合我国南海海域天然气水合物的地球物理特征和成矿特点,给出了技术应用的可能性,提出了一系列技术方案。最后介绍了广州海洋地质调查局在2000年以来进行三分量海底横波勘探天然气水合物方法的研究进展,并提出了一些设想和建议。

In the field of seismic exploration, seismic prospecting using longitudinal （P-w）, shear wave （S-w） and transverse wave （PS-w） combined exploration has become a hotspot in recent years. In this paper, the overland three component shear wave exploration method is introduced into the natural-gas-hydrate exploration. It firstly describes the mature technology and advantages of the shear wave method in land seismic exploration. Combined with the natural-gas-hydrate geophysical and metallogenic characteristics in the South China Sea, it gives the possibility of suitable technological application, and puts forward a series of technical schemes. This paper also introduces the research progress and problem of the three component ocean wave exploration for natural-gas-hydrate conducted by the Guangzhou Marine Geological Survey since 2000, and raises some ideas and suggestions.