最大炮检距对地震资料采集和成像效果的影响
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摘要
在地震资料采集中,最大炮检距的选择是观测系统设计至关重要的一个参数,直接影响地震资料采集的成像效果和质量。在设计时,应基于地质模型进行射线追踪、模拟激发、频谱分析,主要考虑动校拉伸、速度分析的精度误差、干扰波切除、反射系数稳定、多次波的压制等因素。分析论证点处的最大炮检距对地震信号成像效果的影响,并结合地质任务要求,合理设计最大炮检距。
In seismic acquisition,maximum offset is the most important of all parameters of geometry designing.It influences the imaging result and quality of seismic acquisition directly.In designing geometry,tracing rays and shooting shall be based on geologic models and analyzing spectrum of seismic data.At the same time those factors shall be mainly considered,such as NMO stretch,velocity analytical accuracy,noise mute,reflecting coefficient stability,attenuate multiples,and so on.Tie effect of maximum offset on seismic signal imaging result in different demonstrating positions is analyzed,design appropriate to the maximum offset is combined with the geological tasks to the events.
In seismic acquisition,maximum offset is the most important of all parameters of geometry designing.It influences the imaging result and quality of seismic acquisition directly.In designing geometry,tracing rays and shooting shall be based on geologic models and analyzing spectrum of seismic data.At the same time those factors shall be mainly considered,such as NMO stretch,velocity analytical accuracy,noise mute,reflecting coefficient stability,attenuate multiples,and so on.Tie effect of maximum offset on seismic signal imaging result in different demonstrating positions is analyzed,design appropriate to the maximum offset is combined with the geological tasks to the events.
引文
[1]蒋连斌.高分辨率地震勘探资料采集技术[M].长春:吉林科学技术出版社,2000.170~174.
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