Research On Wavelet Adaptive Deconvolution Method And Application For Non-stationary Seismic Data

With the development of petroleum exploration, oil and gas exploration targets are mainly based on lithologic exploration. The lithologic traps exploration is relatively more difficult, so higher requirement is required for the resolution of seismic data. High resolution seismic data processing is an important part of high resolution seismic exploration. High resolution seismic data is the basis of alternate thin-beds reservoir attribute analysis and reservoir prediction.Stack technique is an important method to improve the signal to noise ratio of seismic data. But if non-phase seismic waves are stacked, the high frequency signals in the seismic data will be greatly damaged. Therefore, to improve the main frequency of seismic wave and improve the data bandwidth for high resolution seismic data processing is very important. In this paper, the research on improving resolution processing technology for Tazhongshun No.1 west well 3D post-stack seismic data with to the Silurian stratum target layer is done, and an adaptive deconvolution method is developed. Adaptive deconvolution method is constructed to solve the underdetermined mathematical problem of the matching coefficient, and wavelet adaptive deconvolution can be done to improve the resolution of seismic data. First of all, this paper describes the principle of adaptive deconvolution method, and puts forward the idea of solving the problem by means of mathematical transformation. After that, the forward model is established and the method is applied to the model data. Then, the application technology on how to improve the resolution of seismic data in the Tazhong desert with low signal to noise ratio and super deep target is developed. And the method is compared with the zero pass wavelet transform method.The aim of this paper is to explore processing technique for improving the resolution of seismic data in a set of desert area in Tazhong area. The processing results show that the resolution of seismic data in this area is obviously improved, and reliable basic data for the implementation of the Silurian tectonic and lithologic stratigraphic trap is provided.