三维地震数据体多分辨率数据组织与管理技术研究

Multi-resolution organization and management of massive 3D seismic data volume

(1.中国石油化工股份有限公司石油物探技术研究院,江苏南京210014;2.南京大学计算机科学系,江苏南京210093)

Research Institute of Geophysical Prospecting,SINOPEC Nanjing 210014,China

针对海量三维地震数据体可视化实时性存在的问题,提出了采用基于扩展八叉树数据结构的分块多层多分辨率模型。通过对海量地震数据的分块处理,建立了与数据对应的八叉树层次结构,实现了在PC机上大规模地震数据体的三维可视化显示。在海量地震数据组织方面，使用较为简便的编码方式,避免了在绘制过程中复杂的解码操作对实时性的影响以及编解码带来的误差。在海量地震数据管理方面,通过多分辨率建模,按分层的Z-Order顺序进行存储,在快速查询方面具有较高的效率,可以满足三维海量地震数据体可视化实时性的需要。

A method about Level of Detials (LOD) model on the basis of extended octree data structure is proposed for the real-time visualization of massive 3D seismic volume.The LOD model can brick massive 3D seismic volume and build octree level structure to realize 3D visualization of massive seismic data volume on PC.In massive seismic data organization,a relatively simple encoding is used to avoid the impact of complex decoding operation on the real-time visualization and encoding/decoding errors during 3D rendering.In massive seismic data management,multi-resolution modeling is used to store the data on each level according to the order of Z-Order,and the establishment of Morton code list has high efficiency for fast query,to meet the real-time needs of massive 3D seismic data volume visualization.