Research On Three-dimensional High-density Seismic Data Processing Technology And Method In Tarim Basin

Tarim Basin is the largest petroliferous sedimentary basin in China.With the deepening of exploration and development,the difficulty is also increasing year by year.How to improve the imaging accuracy of secondary and tertiary faults and the imaging quality of fractured vuggy reservoirs is an urgent problem to be solved in seismic exploration at this stage.Based on the high-density 3D seismic data in TaZhong,the main research contents are as follows:carrying out the analysis of the observation system and the key points of the original data,so as to lay the foundation for the formulation of the key processing;carrying out scientific and reasonable research on key processing technologies such as comprehensive static correction,pre-stack and post-stack fidelity denoising,relative amplitude-preserving processing,deconvolution and depth domain migration imaging.The innovation of the research is mainly focused on the following point:Before the conventional post-stack denoising,the relative amplitude eigenvalues between sample points in the data body are extracted to form the amplitude retention factor data volume.The amplitude retention factor is calculated with the conventional post-stack denoising results to obtain the final post-stack data volume after denoising,which eliminates the disadvantage of blurring "beaded reflection" in the previous denoising technology.Through a series of method improvements,the processing results show superior performances over previous data,which can help to characterize reservoirs in the Tarim Basin.