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A NEW TECHNIQUE FOR DENOISING LOG CURVE ON THE BASIS OF WAVELET TRANSFORM |
Zou Changchun1, Yang Xinde1, Pan Lingzhi2, Zhu Jiyong1, Li Yanhua2 |
1. China University of Geosciences, Beijing 100083;
2. Logging Corporation, Dagang Oilfield Group, Tianjin 300280 |
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Abstract Based on the idea of wavelet transform,this paper puts forward a new technique for denoising log curve.First,wavelet decomposition of log curve is carried out in accordance with Mallat tower algorithm,then a nonlinear soft threshold is used to restrain and leach noise in the wavelet field,and finally the reconstructed log curve is obtained through wavelet reverse transform.The result shows that the technique is more effective than the traditional filtering method.
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Received: 17 May 1999
Published: 24 December 1999
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