基于反射系数和地面力信号的谐波干扰消除法  

Method of suppressing harmonic noise based on reflection coefficient and ground force signal

作　　者：韩文功 曲英铭 胡立新 李振春[2] 黄建平[2] 黄金强 

机构地区：[1]中石化地球物理有限公司,北京100000 [2]中国石油大学(华东)地球科学与技术学院地球物理系,青岛266580 [3]中石化地球物理有限公司胜利分公司,东营257086

出　　处：《地球物理学进展》2015年第6期2647-2659,共13页Progress in Geophysics

基　　金：国家重点基础研究发展计划(973)(2014CB239006;2011CB202402);国家自然基金(41104069;41274124);山东省自然基金(ZR2011DQ016);中央高校基本科研业务经费专项(R1401005A)联合资助

摘　　要：可控震源具有安全、环保、高效、低耗等优势在国内外得到了广泛的应用.但谐波干扰的存在对可控震源采集数据的处理带来巨大的困难,并成为制约可控震源高效采集技术发展的瓶颈.本文对此谐波干扰进行研究,认为每一炮所产生的谐波干扰是谐波畸变信号与反射系数的褶积,基于此得出了有关谐波干扰与反射系数的关系的结论,进而提出了基于反射系数和地面力信号的谐波干扰消除方法,理论上如果给出精确的反射系数和每一炮的地面力信号就能够求出所有的谐波干扰,同时也验证了即使忽略反射系数值和反射系数值存在0.5的波动也能取得较好的效果.Vibrator is widely used because of its safety,environmental protection,efficiency and low consumption at home and abroad.While harmonic noise brings great difficulties to the processing of vibroseis data,and becomes a bottleneck in the development of efficient vibroseis acquisition techniques.In this paper,harmonic noise is studied and think that harmonic noise generated by every shot is the convolution of harmonic signal and reflection coefficient.The relationship of harmonic noise and reflection coefficient is summed up,and then method of suppressing harmonic noise based on reflection coefficient and ground force signal is proposed.In theory,if accurate reflection coefficient and ground force signal of every shot are known,all harmonic noise can be obtained.Meanwhile even if reflection coefficient value is ignored or has a variation range of 0.5,the results are also satisfactory.

关 键 词：可控震源 谐波干扰 反射系数 地面力信号 谐波压制 

分 类 号：P631[天文地球—地质矿产勘探]