Reservoir Characterization Using Image Analysis of Core - Examples from the Geysers Geothermal Field

Abstract

imaging can improve the efficiency and accuracy of tion, interpretation and archiving of reservoir data. Digital images whole or core can replace traditional photography and means of quantitative analysis that were previously available. Images with the resolution of conventional photographs can be collected using either a still or video imaging camera and then using image processing Geographic Information System software. The images can be annotated describe lithology and identify important features. Color techniques used classify important features such as mineralogy, rock type, vein distribution, and fracture matrix porosity. This digital data may be used establish the statistical distribution of these features in the core. Image analysis also can be accomplished at the microscopic level. This approach has been used document character of porosity in core from The geothermal field and simulate the process of adsorption. Once digital images are collected, they can be in a GIS database. The large size data files produced by imaging suggests that CD-ROM is the preferred for longterm storage. The data basc also allows other information, such as porosity and permeability or geophysical logs, he combined with the images.