An Integrated Approach to 3-D Modelling to Better Understand Geothermal Reservoirs

Abstract

This study presents some tools and techniques to construct an integrated 3-D model of a geothermal field. A synthetic dataset is used to build a model using Leapfrog Geothermal software. The geological setting of the field is defined from surface geological data and borehole information. Hydrothermal alteration mineralogical and chemical zoning is represented in detail, in combination with temperature measurements to characterise particular reservoir conditions. The combination of multiple datasets in one single interface is providing the tools necessary to solve a multidisciplinary challenge and better correlate available information. Fast 3-D interpolation techniques are used to generate geological models and interpolant models. Powerful and flexible visualisation tools facilitate our interpretation of the data and models and identification of possible correlation to improve our understanding of the dynamics and evolution of a geothermal field. This example demonstrates the strength of an integrated approach to help better understand the geological framework and evolution of geothermal reservoir, improves the operator confidence and supports drilling strategies and day-to-day management of the resource.