Application of wavelet in measuring the depth of oil well

摘要

Since non-singular signal and random signal have different modulus maxima spread characterization in wavelet transform, the maxima corresponding to the noise are removed and the original signal can be reconstructed. Thus we derive the correlation template from denosied signal, and the accurate position of echo in strong noise environment is detected by correlation analysis. Therefore, the depth of the oil well between the ground and oil surface is obtained. A comparison is given between the correlation signal that used wavelet analysis and the one that does not, from which we can see the superiority of the wavelet analysis.