检波器耦合响应数据的分析与评价应用研究
发布时间：2019-06-14 15:41
【摘要】：在不同物性地表条件下,同一检波器的响应会不同；在同一地表条件下,不同自然频率检波器响应也不同。以往地震勘探都是凭借经验或是对比实验来选取相对接收效果好的检波器,但是并没有一套定量分析的理论和方法。我们尝试采用双自由度耦合系统,利用不同近地表参数,模拟各种检波器的频率响应,给实际应用提出选择。本论文的研究侧重于模拟检波器的幅频响应,同时与实际勘探的单道地震记录进行对比,论证双自由度耦合系统的适应性；同时,在不同的地表条件下,分别进行双自由度耦合系统的模拟,结合广义S变换的时频分析方法,给出某工区检波器选择的建议。为了获得更好的地震记录,又采用分频匹配滤波技术,拓宽采集的地震频率,提高信噪比。
[Abstract]:Under the condition of different physical properties, the response of the same geophone will be different, and the response of different natural frequency geophone will be different under the same surface condition. In the past, seismic exploration is based on experience or comparative experiments to select geophone with good receiving effect, but there is no set of quantitative analysis theory and method. We try to use a two-degree-of-freedom coupling system to simulate the frequency response of various geophones by using different near-surface parameters, and give a choice for practical application. The research in this paper focuses on simulating the amplitude-frequency response of geophone, and compares it with the single seismic record of actual exploration to demonstrate the adaptability of dual-degree-of-freedom coupling system. At the same time, under different surface conditions, the simulation of two-degree-of-freedom coupling system is carried out respectively, and combined with the time-frequency analysis method of generalized S transform, some suggestions for the selection of geophone in a certain area are given. In order to obtain better seismic records, frequency division matching filtering technology is used to broaden the collected seismic frequency and improve the signal-to-noise ratio (SNR).
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.436
本文编号：2499497
[Abstract]:Under the condition of different physical properties, the response of the same geophone will be different, and the response of different natural frequency geophone will be different under the same surface condition. In the past, seismic exploration is based on experience or comparative experiments to select geophone with good receiving effect, but there is no set of quantitative analysis theory and method. We try to use a two-degree-of-freedom coupling system to simulate the frequency response of various geophones by using different near-surface parameters, and give a choice for practical application. The research in this paper focuses on simulating the amplitude-frequency response of geophone, and compares it with the single seismic record of actual exploration to demonstrate the adaptability of dual-degree-of-freedom coupling system. At the same time, under different surface conditions, the simulation of two-degree-of-freedom coupling system is carried out respectively, and combined with the time-frequency analysis method of generalized S transform, some suggestions for the selection of geophone in a certain area are given. In order to obtain better seismic records, frequency division matching filtering technology is used to broaden the collected seismic frequency and improve the signal-to-noise ratio (SNR).
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.436
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