The Research On Three-Dimensional Seismic Data Processing And Profile Extraction Algorithms

With the development of three-dimensional seismic exploration technology, theamount of experimental data obtained by seismic exploration rapid growth, seismicinterpretation system for three-dimensional seismic data visualization technologyrequirements are also rising. In order to meet the growing demand, we need high-qualityseismic data processing, storage, visualization and profile extraction algorithm. Usingthree-dimensional seismic data processing and profile extraction algorithm, seismicinterpreter can be more intuitive and meticulous observation of the internal structure ofseismic data. The most commonly used three-dimensional seismic data processing methodincludes volume rendering, profile extraction and so on. By using volume renderingtechnology, it shows the internal features of the seismic data body. By extracting the profile,displaying the slice and interacting, we can do the seismic interpretation more precise andcorrectly.In this article, we research the three-dimensional seismic data processing algorithmsand profiles extraction algorithms. We have researched and implemented contents aremainly included in the following aspects: three-dimensional seismic data preprocessing,large-scale data storing, load handling, direct volume rendering of three-dimensionalseismic data processing and profiles of seismic data extracting technology.Firstly, in this paper we do some research in the three-dimensional seismic datapreprocessing, mainly for the de-noising method of the SEG-Y format data. Secondly, weused the LDM file format which based the octree storage structure to convert the SEG-Yformat files into LDM format, to improve the three-dimensional seismic data accessing andrendering efficiency. Then, the three-dimensional seismic data visualization techniqueswere studied and realized. The volume rendering technology, especially the direct volumerendering techniques are discussed, and studied volume rendering algorithms including theray-casting algorithm, footprints table method and shear-warp algorithm and so on. For theadvantages and disadvantages of various volume rendering algorithms, combined withthree-dimensional seismic data visualization and seismic interpretation of the actualdemand, we use ray-casting algorithm for three-dimensional seismic data visualization.Finally, we discuss the profiles extraction and display of three-dimensional seismic data,and by combining the octree storage structure we propose the algorithms of the three-dimensional seismic data orthogonal and arbitrary profile extraction and display.This article dedicated to the research of three-dimensional seismic data processingalgorithms and profile extraction, by introducing octree data structure in3D seismic data toimprove the efficiency of profile extraction and display. Three-dimensional seismic dataprocessing technology is the very important part of the geological exploration work, thethree-dimensional seismic data visualization techniques can present the data volumevisually to the seismic interpreters and enable seismic interpreters to better understandgeological formations and geological structure of the measured work area distribution,which made a better decision method for the exploration of oil and gas reservoirs. The workthis paper has done provides a new way of thinking about the three-dimensional seismicdata processing, and can assist the interpreters more efficiently in interpretation of theseismic data.