摘要
东海陆架属于典型的浅水区,受海面、海底以及新近系底界面等强反射界面的影响,普遍发育多种类型多次波干扰,使得中深部地震反射信号被掩盖,影响了深部的成像品质。常规SRME或者DWD的方法无法有效地对多次波进行压制。笔者采用组合压制方法对东海陆架二维地震数据进行处理。首先针对海底相关短周期多次波使用DWD方法衰减;然后运用三维GSMP二维化方法去除跟地层相关的长周期多次波;最后残留的近远偏移距多次波分别用PRIMAL和高精度RADON变换进行压制。结果表明,这种组合思路能较好地解决东海多次波问题,使中深部有效反射信号得以呈现,有助于提升中生界的成像质量。
The East China Sea is a typical shelf sea covered by shallow water. Seismic data there is strongly effected by some reflection interfaces, such as the water surface, the sea floor, and the Neogene bottom boundary.Multiple waves are common and the middle to deep seismic reflection signals are always masked, so the quality of deep images is poor. Conventional SRME or DWD methods can not effectively suppress the multiple waves. In this paper, therefore, a combined suppression method is proposed for solving the problem. Firstly, the DWD method is used to attenuate the seabed-related short-cycle multiples. Then converted the 3D GSMP to 2D so as to remove the long-cycle multiples related to the layered underground strata. Residual near-offset multiples are suppressed using PRIMAL, while the mid-to-far offset multiples are suppressed with high-precision RADON transformation. The processing results of the two-dimensional data from the East China Sea shelf proves that the methods mentioned above may effectively solve the multiple wave problems in the East China Sea, particularly for the reflection signals from the middle and deep parts, and thus imaging quality of the Mesozoic is much improved.
作者
颜中辉
王小杰
刘媛媛
徐华宁
杨佳佳
杨长清
杨传胜
YAN Zhonghui;WANG Xiaojie;LIU Yuanyuan;XU Huaning;YANG Jiajia;YANG Changqing;YANG Chuansheng(Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,MNR,Qingdao Institute of Marine Geology,cGS,Qingdao 266071,China;Function Laboratory of Marine Geo Resouree Evaluation and Exploration Techmology,Qingdao National Laboralory for Marine Science and Technology,Qingdao 266071,China;Gcophysical Exploration Academy of China Meallurgical Gcology Bureau,Baoding 071051,Hebei,China)
出处
《海洋地质前沿》
CSCD
2020年第7期64-72,共9页
Marine Geology Frontiers
基金
青岛海洋科学与技术国家实验室开放基金“多分量地震波逆时偏移拉伸校正及其并行”(QNLM2016ORP0206)
国家自然科学基金青年基金“东海北部外陆架晚更新世以来两期古三角洲的时空展布特征及物源属性研究”(41706069)
中国地质调查局项目“东海南部闽江-基隆凹陷中生界油气资源调查”(DD20190211)。
