采用428XL仪器实现高保真可控震源三维地震采集
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摘要
428XL地震仪器系统成功实践了一种新的可控震源施工技术和方法——高保真可控震源采集技术(HFVS)。本质上,HFVS技术是以采集到的每台震源实际运动的信号来进行数据反演,替代了传统的以参考信号进行的互相关处理,从而有效地减少了谐波畸变对地震资料品质的影响。在实际施工时,HFVS技术采用多台震源以不同初始扫描相位同时激发,再将采集到的地震记录进行分离处理得到每台震源的大地脉冲响应,实现了高效采集条件下的可控震源单点激发。本文详细介绍了HFVS技术的基本原理,总结了高保真可控震源采集的施工特点及其对仪器采集设备的要求,并通过实例,介绍了利用428XL仪器先进的技术性能实现高保真可控震源三维地震采集的方法和经验。
As a kind of new vibroseis acquisition technique and method,Sercel 428XL successfully implement the HFVS acquisition in the field.Intrinsically,instead of traditional cross correlating the data with pilot signal,the HFVS technique is to use recorded practical vibrator motion of each vibrator to invert seismic data,which effectively reduces the influence of harmonic distortion on the quality of seismic data.In practical operation,the HFVS uses multiple vibrators to conduct the simultaneous vibration with different initial sweeping phase,and then the separation processing is carried out for the acquired seismic data to obtain the earth pulse response of each vibrator,realizing single-point shooting of vibroseis in high-efficient acquisition condition.The paper introduces in detail the basic principle of HFVS,and makes a summary about the operational features of HFVS acquisition and requirement of recording equipment.By an example of HFVS 3D seismic acquisition,the paper presents the practical method and experience using the advanced properties of Sercel 428XL to perform 3-D HFVS acquisition.
As a kind of new vibroseis acquisition technique and method,Sercel 428XL successfully implement the HFVS acquisition in the field.Intrinsically,instead of traditional cross correlating the data with pilot signal,the HFVS technique is to use recorded practical vibrator motion of each vibrator to invert seismic data,which effectively reduces the influence of harmonic distortion on the quality of seismic data.In practical operation,the HFVS uses multiple vibrators to conduct the simultaneous vibration with different initial sweeping phase,and then the separation processing is carried out for the acquired seismic data to obtain the earth pulse response of each vibrator,realizing single-point shooting of vibroseis in high-efficient acquisition condition.The paper introduces in detail the basic principle of HFVS,and makes a summary about the operational features of HFVS acquisition and requirement of recording equipment.By an example of HFVS 3D seismic acquisition,the paper presents the practical method and experience using the advanced properties of Sercel 428XL to perform 3-D HFVS acquisition.
引文
1Krohn Cand Johnson M.HFVSTM:Enhanced data qual-ity through technology integration.Geophysics,2006,71,13～23
2Krohn C E and Johnson M L.High fidelity vibratory seismic(HFVS)II:Superior source separation.73th Ann.Internat.Mtg.,Soc.Expl.Geophys.,Expanded abstracts,2003
3Allen K P,ML Johnson and J S Ma.High fidelity seis-mic(HFVS)method for acquiring seismic data.68th An-nual International meeting,SEG,Expanded abstracts,1998,140～146
4Glen Larsen,Paul Hewitt and Art Siewert.Correlating versus Inverting Vibroseis Records:Recovering what you put into the ground.2007CSPG CSEGconvention.2007
5夏勇编译.可控震源高保真地震数据采集方法.物探装备,2000,10(2):14～17
6王文良.从428XL的推出看地震数据采集系统的新发展.物探装备,2006,16(1):1～15
7Sercel公司.428XL仪器用户手册(V2.0).2006
8Sercel公司.428XL仪器安装手册(V2.0).2006
2Krohn C E and Johnson M L.High fidelity vibratory seismic(HFVS)II:Superior source separation.73th Ann.Internat.Mtg.,Soc.Expl.Geophys.,Expanded abstracts,2003
3Allen K P,ML Johnson and J S Ma.High fidelity seis-mic(HFVS)method for acquiring seismic data.68th An-nual International meeting,SEG,Expanded abstracts,1998,140～146
4Glen Larsen,Paul Hewitt and Art Siewert.Correlating versus Inverting Vibroseis Records:Recovering what you put into the ground.2007CSPG CSEGconvention.2007
5夏勇编译.可控震源高保真地震数据采集方法.物探装备,2000,10(2):14～17
6王文良.从428XL的推出看地震数据采集系统的新发展.物探装备,2006,16(1):1～15
7Sercel公司.428XL仪器用户手册(V2.0).2006
8Sercel公司.428XL仪器安装手册(V2.0).2006
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