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 Qian- gtang 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.
出处
《复杂油气藏》
2012年第2期36-40,共5页
Complex Hydrocarbon Reservoirs
关键词
羌塘盆地
地震勘探
检波器
信噪比
Qiangtang Basin
seismic exploration
geophone
signal to noise ratio
