Visualization of Geological Features Using Seismic Volume Rendering, Rgb Blending and Geobody Extraction

Abstract

Visualization and extraction of 3D objects from seismic is critical for improving reservoir understanding, detecting anomalies, and defining facies. Geological features of the reservoir can be identified using seismic volume rendering; RGB blending, if applying transparency on regional 3D seismic volumes do not provide a clear identification; and geobody extraction for future reservoir characterization. The Seismic Volume Rendering process is a display of all data within a seismic volume at the same time. By rendering a seismic volume and working with the opacity to make it partially opaque (high amplitudes) and partially transparent (crossover amplitudes), it is possible to identify hidden structural or depositional features. However, even through volume rendering, sometimes it is difficult to identify areas of interest. The RGB method is the best option in that situations because allows the blending of different seismic attributes and its opacity scales using the primary colors (Red, Green and Blue) which enables a better visualization of geological features. After visualizing the 3D object through seismic volume rendering or RGB blending, the body is extracted. Once extracted, volumetrics can be calculated or it can be directly sampled into a geological model as a discrete object to condition the petrophysical modeling. Existing geobodies can be included or excluded from further volume extraction for improved classification of facies. The resulting property can then be used in much the same way as a facies model to condition petrophysical property models.