测井数据三维可视化中的坐标系统及相关计算问题

The Coordinate System and the Related Calculations in 3D Visualization Problems for Well Logging Data

在油气井完整性评估技术中,测井数据的三维可视化是必不可少的手段。沿着井的实际三维轨迹进行测井数据或图像的可视化,对于数据的理解、分析与解释会有极大的帮助。本文引入专业的大地测量学坐标系统,开发了井下坐标计算的定位数据融合算法,对测井数据解释中的三维可视化方法依据一般的、具有内在一致性的坐标系统进行了拓展。我们将这种方法应用于套管井测井中的油套管情况的绘制,得到了接近真实井下场景的效果,为数据的直观理解与解释提供了很大的便利。

In well integrity evaluation technologies three-dimensional(3D)visualization of well logging data is an indispensable device.Rendering visualization of logging data or images along an actual 3D well trajectory would be greatly helpful for understanding,analysis and interpretation of data.Here we introduce a generic geodetic coordinate system for the purpose,and develop algorithms for positioning data calculation and merging.This extends existing 3D visualization method in well logging data processing with a coherent coordinate system.We apply the new method in cased-hole logging for downhole tubing and casing conditions.We get an imitated visualizing effect close to real well situation,providing much convenience for understanding and interpreting logging data in an intuitive way.