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非线性扫描是用于可控震源地震勘探的一项新技术。它能控制输入信号的频谱,因而可用来提高输入信号的高频成份,补偿地层的衰减,提高地层分辨力;也可用来压制某一频率的规则干扰波(如面波、低频干扰)等。这对地层吸收大,低频干扰严重的地区的资料采集工作,特别是对于浅层高频地震勘探有着十分重要的意义。本文着重介绍我们在贵州南部碳酸盐岩地区的非线性扫描初步试验结果。
Nonlinear scanning is a new technique for seismic exploration of vibroseis. It can control the input signal spectrum, which can be used to improve the high-frequency input signal components to compensate for the formation attenuation, improve formation resolution; can also be used to suppress a frequency of regular interference waves (such as surface waves, low frequency interference) and so on. This data acquisition work in the area where the strata absorbs large and low-frequency interference is very important, especially for shallow-frequency high-frequency seismic exploration. This article focuses on the preliminary results of our nonlinear sweep in the carbonate area of southern Guizhou.