摘要
介绍了K—L变换的基本数学原理 ,在此基础上着重阐述了K—L变换压制噪声 ,提高地震记录信噪比的理论依据 ,并给出了一些理论模型进行了试算研究和分析。结果表明 :K—L变换去噪的效果与地震记录上同相轴的空间相关程度及所选取的特征值的个数有关 ,对于同相轴空间相关程度较好的记录 ,只要将特征值个数选取在其曲线拐点处进行变换便可达到目的 ;反之 ,需选取的特征值个数不易准确确定 ,从而影响去噪效果。
The basis principle of Karhunen-Loeve (K-L) transform is sketched out in this paper. On the basis of this, the theoretical foundation of inhibition the noise and increase signal noise rate of seismic record is expounded. And based on the theoretical models, the test research and analysis has been done. The results show that the effect of inhibition the noise with K-L transform has relation to the closely relevant event on the seismic record and the number of characteristic value. When K-L transform was done for the record of the closely relevant event is better, and the number of characteristic value is chosen at the inflection point of the curve, the effect of transform is achieved. Otherwise, the number of the number of characteristic value can not be defined exactly. Thereby the effect of inhibition the noise will be decrease.
出处
《西南石油学院学报》
CSCD
2003年第3期5-7,11,共4页
Journal of Southwest Petroleum Institute
