海底电缆双检资料正演模拟及特征分析

发布时间：2018-05-27 12:44

本文选题：海底电缆 + 双检　；参考：《地球物理学进展》2017年04期

【摘要】：海底电缆双检采集是滩浅海地区地震勘探的重要手段.目前,国内外对双检资料的研究主要集中在鸣震压制方面,而对双检资料中有效波和鸣震的传播规律和陷频特征等研究较少.为了理清有效波和鸣震在水检和陆检中不同响应产生的原因,本文针对海底电缆双检资料开展正演模拟研究,利用二维声波方程的一阶应力—速度方程中的压力和垂向速度分量表示水检和陆检进行正演模拟,并采用自由表面的应力镜像法处理气水边界,形成了双检资料针对性正演模拟技术;分析有效波和鸣震在双检中的波场传播特征,以及不同水深双检资料的陷频规律,为双检资料鸣震压制等处理提供理论依据.
[Abstract]:Submarine cable double-check acquisition is an important means of seismic exploration in shoal and beach area. At present, the research on the double detection data is mainly focused on the sound suppression, but there are few studies on the propagation law and the trapping frequency characteristics of the effective wave and the sound in the double check data. In order to clarify the causes of the different responses of effective waves and ringing earthquakes in water and land inspection, the forward simulation study is carried out in this paper for submarine cable double-check data. The pressure and vertical velocity components in the first order stress-velocity equation of the two-dimensional acoustic wave equation are used to represent the forward modeling of the water inspection and the land inspection, and the free surface stress mirror method is used to treat the gas-water boundary. The forward modeling technology of double detection data is formed, the wave field propagation characteristics of effective wave and sound in double detection are analyzed, and the law of trap frequency of double detection data of different water depth is analyzed, which provides the theoretical basis for the processing of sound and earthquake suppression of double detection data.
【作者单位】：中国石化胜利油田分公司物探研究院;
【基金】：国家重大科技专项“渤海湾盆地精细勘探关键技术(2016ZX05006002) 中石化重点攻关课题“滩浅海地震资料关键处理技术研究”资助
【分类号】：P631.4

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