基于web3d的海底地层三维可视化平台

Web3d Based Seabed Strata Visualization Platform

针对海底多源综合数据的内容和特点,设计了"剖面—钻孔"三维空间建模方法,将海上地震勘探获取的海底地层剖面离散点数据进行Kriging插值,得到每一地层界面的均匀网格;然后,为每一层界面构建Delaunay三角网模型,同时以钻孔测试数据对其缓冲区内的点集进行高度值修正,确定海底地层界面模型,并且采用GPU着色器对每一层进行专题渲染。通过对三维网络引擎技术的研究,实现了网络环境下的海底地震剖面、地层结构和地质体的三维建模和显示。采用东营附近海域获得的海底综合数据,对该平台的功能进行了初步的应用和示范,取得了较好的效果。

According to the characteristics of the multi-source comprehensive data under the seabed, ＂section-boring＂ three-dimensional model was designed. In this model, the seabed stratigraphic profile obtained by seismic reflection was digitized into discrete points and interpolated with approved Kriging arithmetic to produce uniform grid in every strata layer. Then Delaunay triangular model was constructed in every layer and calibrated using boring data to rectify the depth value of the dataset within the buffer. Finally, the constructed 3D seabed stratigraphic model was rendered every layer by GPU shader engine. With research of the web3D engine technology, web-based 3D modeling and rendering of undersea seismic sections, geological structure and stratigraphy were implemented. Using comprehensive undersea data obtained near Dongying area, a preliminary application and demonstration of the platform was achieved.