Research On Seismic Sensitivity Parameter Optimization Method And Software Development

With the development of oil and gas exploration,petrophysics analysis technology has been widely used in reservoir prediction and fluid detection.In seismic petrophysics,the study of elastic parameters of rock is a very important part.The elastic parameters of rock directly describe the influence of pore fluid and skeleton on the elastic properties of rocks.However,the sensitivity of the elastic parameters of reservoir rocks is different to lithology or fluid,and the ability to identify lithology and fluid are also different;in the face of a large number of rock elastic parameters,how to choose the parameters which are most sensitive to lithology and fluid,the latter is very important to seismic inversion,fluid identification and reservoir prediction.However,there is still a lack of systematic theoretical guidance for selecting the elastic parameters of high sensibility,and most seismic interpreters usually choose the sensitive elastic parameters according to the experience.In the commonly used petrophysics analysis software,there is a lack of sensitive parameter analysis module.Therefore,it is urgent to study the sensitive parameters in a more professional and effective way.In this paper,optimization of seismic sensitive parameters as the main research object.Based on petrophysics theory,summarizes the practical seismic sensitive parameter optimization method.And on the basis of the research production,we development of "seismic reservoir sensitive parameter optimization software",the software includes data management,parameter calculation and sensitive parameter optimization and picture display module,can satisfy the sensitive parameter optimization of petrophysics analysis in demand.Using the software to select the parameters,we can avoid the multi-solution and uncertainty of low sensitivity parameters in reservoir prediction,and improve the success rate of oil and gas reservoir prediction.This paper is divided into five chapters,the first chapter mainly reviews the research purpose and significance of this thesis,briefly introduces the research status of optimization method of sensitive parameters and software at home and abroad;the second chapter introduces the theoretical basis of sensitive parameter optimization software,mainly includes: petrophysics,quantitative intersection graph technology,fluid sensitive factor,the parameter sensitivity analysis method and application;the third chapter mainly introduces the idea and design process of sensitive parameters optimization software,mainly including the software programming language and development platform,software framework design and main function module;the fourth chapter introduces the sensitive parameters optimization of software application in the actual project,including the application in sandstone reservoir and shale reservoir;the fifth chapter summarized the research results and practical application results of this paper,and the suggestions for further research in the future.The main results are as follows:(1)The paper has made a lot of theoretical research results,summed up the commonly used methods of seismic sensitivity parameters optimization and theoretical algorithm,and the algorithm is implemented in the software.(2)On the basis of theoretical research,we developed the software for sensitivity parameter optimization,which has the advantages of complete functions,simple operation and strong applicability.(3)The software is used to optimize the seismic sensitivity parameters of the actual work area,and the optimal seismic sensitivity parameters are consistent with the actual situation of the work area,which can meet the needs of practical work.