高保真可控震源采集能量分析
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摘要
高保真可控震源采集技术最大的特点之一就是把多台震源多次扫描得到的叠加记录经过分离算法转化成常规意义上的单台震源激发记录。该方法减少了震源之间的组合影响,保证了资料的相对精度。但由于激发能量的限制,在实际的地震资料采集中很少采用单台震源激发,而是普遍采用组合激发。所以要推广高保真可控震源采集技术的应用,就必须对高保真记录的能量进行分析,研究该技术的应用条件和范围。通过不同台次高保真技术的采集试验和资料分析,总结了震源台次和能量之间的关系,认为进行可控震源高保真采集就必须确保单台震源激发的最大能量能满足资料采集的要求。
One of merits for high fidelity vibroseis acquisition is to gain single vibrator records by separating arithmetically stacking data of multi-vibrators and multi-sweeps.The method reduces source array effect and improves the data accuracy.But in vibroseis acquisition,a single vibrator as a source is seldom adopted due to its energy limit.To extend the applicable range of high fidelity vibroseis acquisition,the energy of high fidelity vibroseis should be analyzed and the applicable condition and working area should be studied.By testing different number of vibrators and different sweeps and analyzing field data,the relationship between energy and the number of vibrators and sweeps is found.Our experiments show that the maximum energy of a single vibrator should meet geological requirements for high fidelity vibroseis acquisition.
One of merits for high fidelity vibroseis acquisition is to gain single vibrator records by separating arithmetically stacking data of multi-vibrators and multi-sweeps.The method reduces source array effect and improves the data accuracy.But in vibroseis acquisition,a single vibrator as a source is seldom adopted due to its energy limit.To extend the applicable range of high fidelity vibroseis acquisition,the energy of high fidelity vibroseis should be analyzed and the applicable condition and working area should be studied.By testing different number of vibrators and different sweeps and analyzing field data,the relationship between energy and the number of vibrators and sweeps is found.Our experiments show that the maximum energy of a single vibrator should meet geological requirements for high fidelity vibroseis acquisition.
引文
[1]Allen K P,Johnson M L and Ma J S.High fidelityseismic(HFVS)method for acquiring seismic data.SEG Technical Program Expanded Abstracts,1998,17:140~146
[2]Christine E Krohn and Mavin L Johnson.Enhanceddata quality through technology integration.Geophys-ics,2006,71(2):169~175
[3]Sallas J,Corrigan D and Allen K P.High fidelity vi-bratory source seismic method with source separation.U S Patent,1998,5721710
[2]Christine E Krohn and Mavin L Johnson.Enhanceddata quality through technology integration.Geophys-ics,2006,71(2):169~175
[3]Sallas J,Corrigan D and Allen K P.High fidelity vi-bratory source seismic method with source separation.U S Patent,1998,5721710
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