本文選題：地震傾角 + 矢量濾波��； 參考：《吉林大學(xué)學(xué)報(bào)(地球科學(xué)版)》2018年03期

【摘要】：在斷層等不連續(xù)位置處估計(jì)局部地震同相軸的方向較為困難。在斷層、地質(zhì)邊界等處,同相軸不連續(xù),結(jié)構(gòu)不穩(wěn)定,導(dǎo)致傾角等地震屬性變化大。為了克服這個問題,本文提出一種自適應(yīng)加權(quán)廣義逆矢量方向?yàn)V波方法,通過光滑經(jīng)過逆轉(zhuǎn)的梯度矢量場來估計(jì)局部地震傾角剖面。計(jì)算過程是:首先由改進(jìn)的梯度算子計(jì)算梯度矢量場;然后設(shè)置垂直向下為參考方向,對梯度矢量場進(jìn)行逆轉(zhuǎn);最后通過自適應(yīng)加權(quán)廣義逆矢量方向?yàn)V波方法估計(jì)傾角剖面。自適應(yīng)加權(quán)廣義逆矢量方向?yàn)V波方法在不連續(xù)位置處具有傳統(tǒng)傾角估計(jì)方法不具有的高分辨率,能夠穩(wěn)健高效地估計(jì)地震數(shù)據(jù)的傾角剖面。理論模型和實(shí)際地震資料處理得到的局部地震傾角剖面表明,所提出的方法能夠高分辨率地保持構(gòu)造細(xì)節(jié)信息。
[Abstract]:It is difficult to estimate the direction of local seismic cophase axis at discontinuous positions such as faults. At faults and geological boundaries, the cophase axis is discontinuous and the structure is unstable, which results in great changes in seismic attributes such as dip angles. In order to overcome this problem, an adaptive weighted generalized inverse vector directional filtering method is proposed to estimate the local seismic dip profile by smooth reversed gradient vector field. The calculation process is as follows: firstly, the gradient vector field is calculated by the improved gradient operator; then the gradient vector field is reversed by setting vertical downward direction as the reference direction; finally, the dip profile is estimated by adaptive weighted generalized inverse vector directional filtering method. The adaptive weighted generalized inverse vector directional filtering method has a high resolution which the traditional dip estimation method does not in the discontinuous position, and can estimate the dip profile of seismic data in a robust and efficient manner. The local seismic dip profile obtained from the theoretical model and the actual seismic data processing shows that the proposed method can maintain the structure detail information with high resolution.
【作者單位】： 吉林大學(xué)地球探測科學(xué)與技術(shù)學(xué)院
【基金】：國家自然科學(xué)基金項(xiàng)目(41274120,41404085,41504084)~~
【分類號】：P631.4

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本文編號：2000356