本文選題：鬼波壓制　切入點：水平纜　出處：《地球物理學進展》2017年04期

【摘要】：在海洋地震勘探中,鬼波不僅對一次反射波的波形產(chǎn)生干涉現(xiàn)象,而且使地震記錄的頻帶變窄.雖然近幾年發(fā)展起來的斜纜、上下纜地震采集系統(tǒng)和相應的鬼波壓制方法已取得較好的效果.然而對于老數(shù)據(jù)的重處理以及目前依然廣泛采用的水平纜,需要一種更適合的鬼波壓制方法.本文開展了τ-p域壓制水平纜鬼波的方法研究.首先,本文分析了水平纜數(shù)據(jù)鬼波特征,推導了時間域和τ-p域的鬼波延時估算公式,在τ-p域內(nèi)構建了上、下行波的算子,提出了基于τ-p域平面波分解的水平纜鬼波壓制算法,并通過引入Cauchy范數(shù)能量約束算子提高算法的穩(wěn)定性.應用數(shù)值模型及海上實際地震數(shù)據(jù)進行了檢波點端的鬼波壓制試驗.結果表明,該方法在不需要射線垂直入射的假設和介質(zhì)速度模型的前提下,能有效分離出一次反射波,并拓寬地震數(shù)據(jù)的有效頻帶.
[Abstract]:In marine seismic exploration, ghost waves not only interfere with the waveform of the first reflected wave, but also narrow the frequency band of seismic records. The upper and lower cable seismic acquisition system and the corresponding ghost wave suppression method have achieved good results. However, for the old data reprocessing and the horizontal cable, which is still widely used at present, A more suitable method of ghost wave suppression is needed. In this paper, the method of suppressing ghost wave in 蟿 -p domain is studied. Firstly, the characteristics of ghost wave in horizontal cable data are analyzed, and the estimation formulas of ghost wave delay in time domain and 蟿 -p domain are derived. The up-and-down wave operators in 蟿 -p domain are constructed, and a horizontal cable ghost wave suppression algorithm based on plane wave decomposition in 蟿 -p domain is proposed. The stability of the algorithm is improved by introducing the Cauchy norm energy constraint operator. The ghost wave suppression test at the detection point is carried out by using the numerical model and the actual seismic data at sea. The results show that, This method can effectively separate the primary reflection wave and widen the effective frequency band of the seismic data without the assumption of the vertical incidence of ray and the medium velocity model.
【作者單位】： 國土資源部海底礦產(chǎn)資源重點實驗室 廣州海洋地質(zhì)調(diào)查局;
【基金】：國土資源部海底礦產(chǎn)資源重點實驗室開放基金(KLMMR-2014-A-03) 國家自然科學基金面上項目(41176056)聯(lián)合資助
【分類號】：P631.46

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本文編號：1699828