Study On The Quantitative Seismic Waveform And Its Application In Reservoir Prediction

The ultimate goal of oil and gas exploration is to find the position of reservoir and gain the reservoir properties.When using seismic methods,as reservoir lithology,physical properties and fluid properties and other properties in reservoirs are different from those in surrounding rock,so the changes in petrophysical properties of the reservoir will be reflected in the seismic waveform structure,then the corresponding reservoir seismic waveform will be able to reflect the physical properties of reservoir rocks.These reservoirs corresponding to the "typical" waveform extracted,establish a waveform library,and then through the "unknown" waveform and waveform library "known" waveform comparison,so as to realize the prediction of the reservoir.The research of quantitative seismic waveform is the focus of this paper,which requires us to choose the right description of the parameters to waveform structure characteristics.The main parameter determines the waveform shape include the number of zero-crossings,the height of troughs and ridges,bump and extreme points,the lift of the waveform,the number of troughs and peaks,inflection and so on.Therefore,in this paper,taking some targeted,being sensitive to waveform structure Change and complying with the description rule parameters of the most waveform structure change for quantitative analysis,in order to achieve reservoir prediction from the "known" to the "unknown".Through check data and a large number of verification,we choose the gradient waveform parameters Xi(t);self-organizing neural network waveform classification parameters L2 and M;Normalized correlation coefficient X,Manhattan distance M,configuration parameters X_M parameters,wave skewness and kurtosis parameter to research quantitative seismic waveform and verify the usefulness of quantitative research through the actual data.Based on the YQ basin as an example,this paper first according to the actual data set up drilled library of waveforms.Then start from the seismic waveform structure characteristics of reservoir,description parameters and quantitative research discussed,which distributed different types of reservoir waveform structure characteristic difference analysis and quality reservoir prediction.Studies have shown that: non-reservoir,reservoir,reservoir quality exist some differences in the earthquake,geological,logging data and so on.So take advantage of the difference between the strike wave of high quality reservoir sensitive structural characterization parameters,waveform quantitative analysis based on the analysis of sensitive information,to help improve the prediction accuracy of different types of reservoirs.Through theoretical study and practical application of data,prove the feasibility of the related techniques methods,and have achieved good results in the reservoir prediction of actual data.