南黄海崂山隆起浅水多次波压制及成像分析

发布时间：2018-02-27 01:32

本文关键词： 浅水区多次波 DWD+SRME组合法 Radon变换崂山隆起南黄海　出处：《海洋地质与第四纪地质》2017年03期 　论文类型：期刊论文

【摘要】：南黄海崂山隆起的中、新生代碎屑岩与下伏的古生代碳酸盐岩地层分界面是一个强反射界面,对地震波向下传播具有强烈的屏蔽作用,加之海上多次波比较发育,使得深部地震反射能量弱、成像困难。在浅水区,由于缺少近偏移距的海底反射信号,利用常规SRME(Surface related multiple elimination)方法不能有效地衰减海底相关多次波,Taup域预测反褶积压制多次波会破坏与海底多次波周期相近的一次有效反射信号,特别在硬海底多次波的振幅能量比海底反射还更强,这种情况下预测反褶积不能完全压制多次波。采用DWD+SRME组合法来衰减海底相关多次波,其中DWD(deterministic water-layer demultiple)方法用来衰减与海底相关的短周期多次波,SRME方法压制自由表面相关的长周期多次波,另外运用高精度Radon变换去除层间多次波,使多次波得到了良好的压制,深部有效反射信号逐步得以体现。通过以上处理效果揭示了崂山隆起为一个平缓的背斜构造,背斜上发育多个逆冲断裂,崂山隆起是在加里东期形成雏形,印支期隆起形成,燕山期为主要发展阶段。
[Abstract]:The Meso-Cenozoic clastic rocks and the underlying Paleozoic carbonate strata in the Laoshan uplift of South Huang Hai are a strong reflection interface, which has a strong shielding effect on the downward propagation of seismic waves, coupled with the development of sea multiples. It makes deep seismic reflection energy weak and difficult to image. In shallow water, due to the lack of near-offset submarine reflection signal, The conventional SRME(Surface related multiple elimination method can not effectively attenuate the seafloor correlated multiples Taup domain to predict that the deconvolution backlog will destroy the first effective reflection signal which is close to the sea floor multiple period. Especially, the amplitude energy of hard seabed multiples is stronger than that of seabed reflection. In this case, prediction deconvolution can not completely suppress multiple waves. DWD SRME combination method is used to attenuate seafloor correlated multiple waves. The DWD(deterministic water-layer demultiple) method is used to attenuate the short-period multiples associated with the sea floor to suppress the long-period multiples related to the free surface, and the high-precision Radon transform is used to remove the interlayer multiples, so that the multiples are well suppressed. Through the above processing results, it is revealed that the Laoshan uplift is a gentle anticline structure, and several thrust faults are developed on the anticline. Laoshan uplift was formed in the Caledonian period and the Indosinian uplift. Yanshanian period is the main stage of development.
【作者单位】：国土资源部海洋油气资源与环境地质重点实验室中国地质调查局青岛海洋地质研究所;海洋国家实验室海洋矿产资源评价与探测技术功能实验室;中国地质大学(武汉)资源学院;
【基金】：国家海洋局海底重点实验室基金(KLSG1603) 青岛市市南区科技发展资金项目基金(2016-3-009-ZH) 国土资源部海洋油气资源和环境地质重点实验室基金(MRE201318,MRE201121) 南黄海油气资源调查(DD20160512) 国家自然科学基金项目(41476053)
【分类号】：P631.4;P736

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