三维地震数据可视化原理及方法

Principles and Implementation of Visualization on 3D Seismic Data Volume

可视化是实现三维地震数据真三维解释的有效方法,本文介绍了三维地震数据可视化的基本原理,论述了用光线投射算法实现可视化的主要步骤,详细推导了合成可视化图像的计算公式,分析了阻光度曲线的物理意义及对可视化图像的调节作用,并用两个实际三维地震数据进行了试验。结果表明该方法能够由原始三维地震数据直接对地质体进行成像,能将分散的、孤立的信息互相联系起来,揭示隐藏在数据中的地质现象和规律。

Visualization is effective for true 3-D interpretation of 3-D seismic data volume.This paper introduces the basic principles of visualization on 3-D seismic data volume,and the main steps using ray-casting algorithm,develops the computing formulas to compose visualization image,discusses the physical meaning of opacity curve and its adjusting function to visualization image.The results of real cases showed the geologic body can be directly imaged from original 3-D seismic data volume by this method.The scattered,isolated information can be related together to reveal the geologic phenomenon and regular hidden in data.