平行徑向道時(shí)頻峰值濾波消減地震資料的隨機(jī)噪聲
發(fā)布時(shí)間：2018-08-25 08:20
【摘要】：針對(duì)傳統(tǒng)時(shí)頻峰值濾波(TFPF)算法在消減地震勘探資料中的隨機(jī)噪聲時(shí),容易引起有效信號(hào)波峰和波谷處的誤差問(wèn)題,提出了平行徑向道TFPF方法。該方法將地震信號(hào)從炮檢距-雙程旅行時(shí)域變換到視速度-雙程旅行時(shí)域后,沿時(shí)空域徑向道方向進(jìn)行TFPF。討論了不同徑向道軌線對(duì)TFPF無(wú)偏估計(jì)的影響,并對(duì)人工合成的地震記錄進(jìn)行了仿真試驗(yàn),將沿不同軌線的平行徑向道TFPF與傳統(tǒng)TFPF結(jié)果進(jìn)行比較。結(jié)果表明:所選軌線平行于同相軸或與之夾角很小時(shí),可使信號(hào)在一個(gè)TFPF時(shí)窗內(nèi)更好地滿足無(wú)偏估計(jì)的條件,從而減小了濾波后波峰及波谷處的誤差,使本文方法具有更好的保幅性,其信噪比較傳統(tǒng)TFPF算法提高了5dB左右,通過(guò)對(duì)實(shí)際地震記錄的仿真,證明了該方法的實(shí)用性。
[Abstract]:Aiming at the problem that the traditional time-frequency peak filter (TFPF) algorithm can easily cause the errors at the peak and valley of the effective signal when reducing the random noise in seismic exploration data, a parallel radial channel TFPF method is proposed. In this method, the seismic signal is transformed from offset to dual travel time domain to apparent velocity-dual travel time domain, and TFPF. is carried out along the radial channel direction in time and space domain. The influence of different radial trace tracks on the unbiased estimation of TFPF is discussed, and the synthetic seismic records are simulated. The parallel radial channel TFPF along different tracks is compared with the traditional TFPF results. The results show that the selected rail line is parallel to the in-phase axis or has a small angle with it, which makes the signal satisfy the condition of unbiased estimation better in a TFPF time window, thus reducing the error between the wave peak and the valley after filtering. The signal-to-noise ratio (SNR) of the proposed method is better than that of the traditional TFPF algorithm, and the 5dB is improved. The practicability of the proposed method is proved by the simulation of the actual seismic records.
【作者單位】： 吉林大學(xué)通信工程學(xué)院;吉林大學(xué)學(xué)報(bào)(信息科學(xué)版)編輯部;
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(41130421)
【分類號(hào)】：P631.4;TN911.4
[Abstract]:Aiming at the problem that the traditional time-frequency peak filter (TFPF) algorithm can easily cause the errors at the peak and valley of the effective signal when reducing the random noise in seismic exploration data, a parallel radial channel TFPF method is proposed. In this method, the seismic signal is transformed from offset to dual travel time domain to apparent velocity-dual travel time domain, and TFPF. is carried out along the radial channel direction in time and space domain. The influence of different radial trace tracks on the unbiased estimation of TFPF is discussed, and the synthetic seismic records are simulated. The parallel radial channel TFPF along different tracks is compared with the traditional TFPF results. The results show that the selected rail line is parallel to the in-phase axis or has a small angle with it, which makes the signal satisfy the condition of unbiased estimation better in a TFPF time window, thus reducing the error between the wave peak and the valley after filtering. The signal-to-noise ratio (SNR) of the proposed method is better than that of the traditional TFPF algorithm, and the 5dB is improved. The practicability of the proposed method is proved by the simulation of the actual seismic records.
【作者單位】： 吉林大學(xué)通信工程學(xué)院;吉林大學(xué)學(xué)報(bào)(信息科學(xué)版)編輯部;
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(41130421)
【分類號(hào)】：P631.4;TN911.4
【參考文獻(xiàn)】
相關(guān)期刊論文 前6條
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