%0 Journal Article
%T Advances in seismic researches on natural gas hydrate in ocean<br>海域天然气水合物的地震研究进展
%A WU Zhi-qiang
%A WEN Li
%A TONG Si-you
%A YAN Gui-jing
%A <br>吴志强
%A 
%A 文丽
%A 
%A 童思友
%A 闫桂京
%J 地球物理学进展
%D 2007
%I 
%X The seismic research on marine gas hydrate has made great development.The main subject is how to identify BSR correctly and predict the Gas Hydrate sediment physical parameters(For example: thickness,porosity,concentration,etc.) On the basis of physical property analysis of marine rocks,seismic method is used to identify true and false BSR and predict physical property of hydrate-bearing sediments for recognition of gas hydrate in sea areas.Recently,great progress has been made in seismic researches on marine gas hydrate,which is showed in the following aspects:(1) for theoretical analysis of physical property,simple model has changed into complex model capable of simulating actual situations to the largest extent;(2) for seismic explorations,seismic methods have gone from conventional single- and multi-channel to multi-frequency,high-resolution 2D and 3D and multiple components;(3) for seismic data processing,conventional method has given way to "three highs" and pre-stack time offset processing with emphasis on BSR characteristics;and(4) for identification of gas hydrate and prediction of its physical property parameters,researches on velocity and amplitude have been replaced by AVO,multi-attribute discrimination,multi-elastic parameter and multi-property parameter inversions.Thanks to these new techniques and methods,investigations in gas hydrate in sea areas have been greatly striding forward,and reliability of geophysical recognition of gas hydrate has been significantly heightened.
%K natural gas hydrate
%K seismic researches
%K advances<br>天然气水合物
%K 地震研究
%K 进展
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=65CE641AB2DEAAF8B2D39ECB6B6B6C80&aid=F6B6A92A6A7ECB39&yid=A732AF04DDA03BB3&vid=BC12EA701C895178&iid=CA4FD0336C81A37A&sid=AD16A18DBD734D13&eid=0DEB7A8A66C33AAD&journal_id=1004-2903&journal_name=地球物理学进展&referenced_num=7&reference_num=48