Application Of Generalized S-transform In Detection Of Carbonate Reservoirs

In geophysical exploration,reservoir testing has always been a major challenge for geophysical workers.Randomness and nonstationarity are the most basic features of seismic signals,and the simplest and most efficient means of dealing with them is time-frequency analysis.So far,time-frequency analysis has been widely used in seismic facies identification,lithology testing,oil and gas detection and improve the seismic data resolution and other fields.However,the ability to accurately and reliably express hidden information in seismic data is the key to solving the problem.This thesis is based on the traditional methods of time-frequency analysis,such as short-time Fourier transform,wavelet transform,Wegener distribution,smooth pseudo-Wegener distribution and S transform.In contrast to its comparative study,Deconvolution short-time Fourier transform,generalized S-transform of improved window function and deconvolution generalized S-transform based on this improved window function.The basic principle and advantages and disadvantages of the above method are discussed in turn.Combining with the typical signal Time spectrum analysis to compare,to obtain more efficient high-precision time-frequency analysis method.Formed a set of good quality,high resolution and frequency convergence of a good analytical method to complete the detection of reservoir research.In this thesis,the carbonate reservoirs are deeply studied,and several sets of forward modeling are developed for the unique characteristics of the actual area.The relationship between the different seismic response characteristics and its speed,shape and size is summarized.In this thesis,the above-mentioned high-precision time-frequency analysis method is applied to the actual seismic data processing.The instantaneous parameters of the seismic data and the frequency profile are obtained.The comparative study is carried out to obtain the most important method.Efficient analytical method.Any single method has some specific defects,only through a large number of methods to combine the organic fluid in the reservoir can be more accurate prediction to complete the reservoir qualitative and quantitative description of the study.Finally,this thesis has obtained the good effect by using the application of the actual seismic data,combined with the drilling data,verifying the applicability and reliability of the method,and providing the exact basis for the detection of the carbonate reservoir and the identification of the seismic facies.