海洋二维双船拖缆与宽频带地震采集实验  

A dual-vessel broadband seismic acquisition experiment

作　　者：李福元 韦成龙[1,2] 胡家赋 邓桂林[1,2] 易海 钟广见[1,2] 

机构地区：[1]自然资源部海底矿产资源重点实验室,广东广州510075 [2]广州海洋地质调查局,广东广州510760

出　　处：《石油地球物理勘探》2018年第5期887-895,共9页Oil Geophysical Prospecting

基　　金：国土资源部海洋地质保障工程项目"南海北部陆坡油气资源调查技术应用研究(GZH201500508)"资助

摘　　要：双船拖缆地震采集可以布设灵活的观测系统,如形成大炮检距、增加覆盖次数、中间激发提供两个方向照明等,进而改善复杂构造的地震成像效果。同时,宽频地震技术日益受到重视,通过大容量宽频震源激发,变深度拖缆接收,并进行数据去鬼波处理,达到拓宽频带的效果。综合双船拖缆与宽频采集的优势所开展的实验表明,成像剖面的浅层分辨率得到提高,中深目标层揭示效果有了改善,该技术在构造成像难点区值得尝试。With dual-vessel towing streamers,we can deploy flexible seismic acquisition geometry.This acquisition geometry has various advantages such as larger offset,higher common mid-point(CMP)folds,dual-azimuth illumination(split spread),etc.At the same time,the large volume broadband source can be used in the seismic acquisition,and variable depth towed-streamers will help de-ghosting during the data processing.All these will greatly improve deep target imaging.So we have carried out a dual vessel seismic broadband acquisition experiment.Final seismic sections show better imaging and higher resolution on both shallow layers and deep targets.This confirms the effectiveness of the proposed acquisition approach and it is worth to use in complex subsurface areas.

关 键 词：双船拖缆 宽频震源 变深度拖缆 去鬼波 频带拓展 合成处理 

分 类 号：P631[天文地球—地质矿产勘探]