基于维纳滤波的双检合成鸣震压制技术  

SUPPRESSION OF REVERBERATION BY THE TECHNOLOGY OF DUAL-SENSOR MERGER BASED ON WIENER FILTERING

作　　者：童思友[1] 向飞[1] 王东凯[1] 马海[1] 朱伟强[2] 卢志君[1] 

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,青岛266100 [2]胜利石油管理局地球物理勘探开发公司,山东东营257100

出　　处：《海洋地质前沿》2012年第10期46-52,共7页Marine Geology Frontiers

基　　金：国家自然科学基金(41176077;41074077);国土资源部海洋油气资源与环境地质重点实验室开放基金(MRE201104)

摘　　要：基于水陆2种检波器响应机制差异的双检合成处理技术,通过对二者记录合并相加,能够有效压制海底电缆双检地震勘探中的鸣震干扰。然而,由于水检和陆检在振幅、频率等响应特征上差异较大,直接相加处理不能达到理想效果,通常需要进行匹配处理后再相加。理想情况下,匹配系数为与海底反射系数相关的固定值,而实际上海底反射系数是变化的,采用固定匹配系数效果较差。在深入研究双检勘探波场传播机制及匹配技术的基础上,提出了基于维纳滤波方法的自适应时空变匹配滤波技术,通过理论模拟记录的试算和实际资料处理,均取得了满意效果,验证了该方法的有效性。The technology of dual-sensor merger based on the individual corresponding mechanism of hydrophones and vertical geophones can effectively suppress the reverberation in the dual-sensor OBC exploration by merging of the dual-sensor signals.However,since there are big differences in amplitude and frequency between the hydrophone and vertical geophone,it is not able to achieve a desired effect by directly merging the dual-sensor signals.There usually needs a match between the dual-sensor signals before merging.It would be ideal if the matching coefficient is a fixed value related to the reflection coefficient of sea floor.However,it is not the case.We are not able to get good results as expected from a fixed matching coefficient.In this regard,we made a deep research on the wave field propagation mechanisms in the dual-sensor OBC exploration and the matching technique.Then an adaptively time-varying matched filtering technique based on the Wiener filtering method was proposed.Satisfactory results have been obtained in practice.

关 键 词：双检合成 鸣震 海底电缆 匹配 维纳滤波 

分 类 号：P631.443[天文地球—地质矿产勘探]