本文關(guān)鍵詞： 斜纜 去鬼波 線性τ-p方程 LSMR算法 拓寬頻帶　出處：《石油地球物理勘探》2017年03期 　論文類型：期刊論文

【摘要】：由于鬼波陷波頻率的多樣性而使海上地震記錄頻帶變窄、分辨率降低,為此,基于平面波傳播理論,推導(dǎo)出τ-p域拖纜觀測的總波場與海水表面觀測的上行波波場之間新的關(guān)系式,建立線性τ-p方程,利用最小平方殘差方法(Least Squares Minimal Residual,LSMR)反演求解方程得到海水表面觀測的上行波波場,并延拓得到拖纜觀測的上行波波場。合成數(shù)據(jù)及海上實(shí)際斜纜數(shù)據(jù)測試結(jié)果表明,本文方法不僅迭代收斂速度快,而且能得到更好、更穩(wěn)定的解,提高計(jì)算效率的同時(shí)改善鬼波的壓制效果,達(dá)到拓寬地震記錄頻帶的目的。
[Abstract]:Because of the diversity of the frequency of ghost wave, the frequency band of offshore seismic records is narrowed and the resolution is reduced. Therefore, the theory of plane wave propagation is based on the theory of plane wave propagation. A new relation between the total wave field observed by towed cable in 蟿 -p domain and the upward wave field observed on sea water surface is derived, and the linear 蟿 -p equation is established. The least square residuals method is used to inverse the equation of least Squares Minimal resilience (LSMR) to obtain the upward wave field observed on the surface of sea water. The combined data and the measured data of the actual skew cable show that the proposed method not only converges fast but also can obtain better and more stable solutions. The efficiency of calculation is improved and the suppression effect of ghost waves is improved to widen the frequency band of seismic records.
【作者單位】： 吉林大學(xué)地球探測科學(xué)與技術(shù)學(xué)院;中國石化石油物探技術(shù)研究院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41674124) 國家“863”計(jì)劃重大項(xiàng)目(2014AA06A605)資助
【分類號】：P631.44

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1 張振波;李東方;;斜纜寬頻地震勘探技術(shù)在珠江口盆地的應(yīng)用[J];石油地球物理勘探;2014年03期

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本文編號：1493191