Application Research Of Seismic Data Volume Rendering Technology In The Exploration Decision Support System

Volume rendering is one of the main methods in scientific visualization field. The intrinsic information of volume dataset can be visualized by volume rendering. Volume rendering is also known as direct volume rendering, for no intermediate geometry primitives are generated during its visualization process. It can generate the image of seismic dataset with high quality details and context. Volume Rendering technology in geological prospecting in the area of application more widely.With oil seismic exploration development, the size of seismic dataset generated has been increased dramatically. Such large scale datasets pose immense challenges to volume rendering. In this paper, we use multi-resolution techniques for volume rendering, which manage original dataset in hierarchical octree structures. Separated seismic dataset into many small datasets, and created low-resolution data every layer. This method not only decreases storage limitation of volume rendering, but also increases rendering speed without sacrificing rendering quality. We improve selection rules and rendering rules in multi-resolution volume rendering process. We improve the algorithm of selecting conditions, rendering conditions and excluding conditions to further increase the rendering speed of seismic data.Finally, a volume rendering framework of Exploration Decision Support System has been designed and developed. And utilize Early Ray Termination method and GPU-based 3D Texture Rendering method to further increase the rendering speed of seismic data.The application of seismic data volume rendering technology in the Exploration Decision Support System, will provide a stronger support for exploration decision and is great significance to improve seismic exploration and drilling accuracy and success rate.