羌塘盆地地震资料采集检波器组合方法研究
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摘要
羌塘盆地前期地震勘探取得的叠加剖面中反射波能量较弱,波组连续性较差,有效波特征不明显,单炮记录上相干噪声、散射噪声较强。对前期勘探单炮记录的特点以及采集参数进行分析后,从提高单炮记录反射波组连续性,压制相干噪声及散射噪声的目的出发,提出了5种改进的检波器组合方式。通过对各方案的理论和实际资料分析,优选有利的检波器组合方式,地震资料采集取得了信噪比相对较高的单炮记录和叠加剖面。
There are weaker reflect wave energy,poor wave group continuity,strong coherent noise and scattering noise in single shot records,and unconspicuous effective wave features in stacked seismic section acquired in early stage of Qiangtang Basin’s exploration.According to the feature of single shot records and acquisition parameters in early explorations,five improved combinatorial methods of geophone were put forward,to improve wave group continuity of single shot record and suppress the coherent noise and scattering noise.Through the analysis of practical data and theory of the combinatorial methods,a favorable combinatorial method of geophone was selected.Therefore,the single-shot record and stacked profile having higher signal to noise ratio ( SNR) can be obtained in seismic data acquisition.
There are weaker reflect wave energy,poor wave group continuity,strong coherent noise and scattering noise in single shot records,and unconspicuous effective wave features in stacked seismic section acquired in early stage of Qiangtang Basin’s exploration.According to the feature of single shot records and acquisition parameters in early explorations,five improved combinatorial methods of geophone were put forward,to improve wave group continuity of single shot record and suppress the coherent noise and scattering noise.Through the analysis of practical data and theory of the combinatorial methods,a favorable combinatorial method of geophone was selected.Therefore,the single-shot record and stacked profile having higher signal to noise ratio ( SNR) can be obtained in seismic data acquisition.
引文
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[2]裘慰庭,郝顺元,高章伟.地震勘探采集技术论文集[M].北京:石油工业出版社,1993.
[3]李勇,王成善,伊海生,等.青藏高原中侏罗世-早白垩世羌塘复合型前陆盆地充填模式[J].沉积学报,2001,19(1):20-27.
[4]严挹非.检波器组合形式的探讨[J].石油物探,1980,19(2):77-87.
[5]傅朝奎,唐建人,李勤学,等.利用联合组合效应提高地震资料的信噪比和分辨率[J].石油地球物理勘探,2000,35(2):236-243.
[6]张德忠.复杂地表地区地震勘探实例[M].北京:石油工业出版社,1994.
[7]阎世信,刘怀山,姚雪根,等.山地地球物理勘探技术[M].北京:石油工业出版社,2000.
[8]蒋连斌,崔文鹏,傅朝奎,等.震检联合组合在高分辨率地震资料采集中的应用[J].石油物探,2000,39(3):73-78.
[9]Albink K.Seismic array design by spatial convolution[J].Geo-physics,2001,66(4):1195-1207.
[10]蒋连斌,何樵登,王建民,等.一种计算检波器线性组合响应曲线的实用方法[J].石油物探,1998,37(1):84-88.
[11]费琪,邓忠凡.西藏特提斯构造域海相油气前景[J].地球科学,1996,21(2):113-119.
[12]陆基孟.地震勘探原理[M].东营:石油工业出版杜,1993.
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