两种斜缆采集正演模拟及虚反射压制效果分析  

Effectiveness Analysis of Forward Modeling and Ghost Suppression for Two Kinds of Variable-depth Streamer Acquisitions

作　　者：周含蕊 宋建国[1] 宫云良 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中海油田服务股份有限公司物探事业部,天津300451

出　　处：《CT理论与应用研究（中英文）》2016年第3期319-330,共12页Computerized Tomography Theory and Applications

摘　　要：斜缆采集是近些年发展起来的海上采集技术,主要为了压制虚反射,获得高品质的宽频地震资料。线形斜缆和弧形斜缆是目前最常用的斜缆类型,能够获取较多的高低频信息。针对这两种斜缆采集方式,通过对比不同采集参数的地震记录及其消除虚反射后的数据,发现弧形斜缆采集观测系统明显优于线形斜缆,不仅在波场模拟中表现出较好的特征,而且在虚反射消除的过程中,引入了较小的噪声,能够获得较高信噪比的地震资料。分析模型测试的结果,证明海上地震勘探中更适合采用弧形斜缆。In recent years, variable-depth streamer acquisition is a kind of seismic exploration technique. The mainly propose of this acquisition is to suppress ghost and obtain high quality broadband seismic data. The commonly used variable-depth streamers are linear streamer and curved streamer, which could obtain more high frequency and low frequency information. By comparing the different parameters of seismic data and de-ghosting data, we found that curved variable-depth streamer data in wave-field analyze showed better characteristics, and have a higher signal-to-noise ratio. That is to say, the observation system of curved variable-depth streamer is superior to the linear variable-depth streamer. According to the result, it is recommended that curved variable-depth streamer is a better choice in the seismic exploration.

关 键 词：斜缆采集 斜缆正演模拟 Radon域消除虚反射 凹陷模型 

分 类 号：P631.44[天文地球—地质矿产勘探]