CAJ | 학술논문

文中展示了南黄海中古生代沉积地层的成像结果,显示南黄海隆起区存在较稳定的中古生代沉积地层残留区.南黄海中古生代残留沉积地层的成像问题一直是地震资料处理的难点,主要原因是以海底鸣震为主的层间多次波和与中古生界顶界面相关的长程多次波非常发育,致使有效反射波无法准确识别.本文利用平面波域层间多次波的可预测性,对地震数据平面波分解之后进行预测反褶积,较好地消除了层间多次波.利用速度差异分离长程多次波,在有效波速度无法确定的务件下,先从低速的、可以确认的多次波开始进行分离,逐步确认并分离多次波,同时逐步进行有效渡的确认和成像速度的尝试,最终得到合适的成像速度场和多次波被充分分离的数据.成像结果对南黄海残留盆地研究有一定借鉴意义.
문중전시료남황해중고생대침적지층적성상결과,현시남황해륭기구존재교은정적중고생대침적지층잔류구.남황해중고생대잔류침적지층적성상문제일직시지진자료처리적난점,주요원인시이해저명진위주적층간다차파화여중고생계정계면상관적장정다차파비상발육,치사유효반사파무법준학식별.본문이용평면파역층간다차파적가예측성,대지진수거평면파분해지후진행예측반습적,교호지소제료층간다차파.이용속도차이분리장정다차파,재유효파속도무법학정적무건하,선종저속적、가이학인적다차파개시진행분리,축보학인병분리다차파,동시축보진행유효도적학인화성상속도적상시,최종득도합괄적성상속도장화다차파피충분분리적수거.성상결과대남황해잔류분지연구유일정차감의의.
The paper shows the imaging result of Paleozoic sediment stratum in the South Yellow sea.The result shows that there exists relative stable residual Paleozoie sediment stratum in the upheaval zone of South Yellow Sea.Due to the existence of interval multiples and long-way multiples,the seismic imaging is very difficult in residual Paleozoie sediment stratum in the South Yellow Sea.In this paper,the data is transformed to plane-wave domain firstly,and then the prediction deconvolution is applied to attenuate the interval multiples.The velocity difference between the multiples and the effective waves are used to attenuate the long-way multiples.First the multiples with lower velocities and distinguish from the effective waves are seperated,and then seperates the multiples with higher velocities,the imaging velocity and the effective waves are re-determined during the iterative process,until all longway multiples are attenuated and suitable imaging velocity are obtained.The imaging result is meaningful to the residual basin research.