The Value of Multidata Visualization in Geothermal Resource Assessment

Abstract

In exploration and subsequent management of geothermal resources a vast amount of data is accrued. This data can be from a variety of sources and times, ranging from rock cuttings collected during well drilling to surveillance temperature and pressure well logs taken years after drilling. At ÍSOR a large part of such measured data has been collected, stored and organized in relation databases, from both domestic and foreign geothermal fields. This centralization of data has allowed for the development of the VINNSLA-system, a program that allows the end-user an easy way to compare and contrast data from different sources and is used in integrated interpretation of data. The VINNSLA-system has been used, e.g., to estimate the undisturbed formation temperature and initial pressure of the reservoir of a geothermal system, and later to follow changes due to production from those systems. It has also been used to find the location of important feed zones using simultaneous visualization of downhole temperature data and spinner data, whether it is raw spinner data or data derived from spinner data such as downhole fluid velocity or mass flow. Along with aiding in analysis and interpretation, the VINNSLA-system also produces figures ready for publications in reports and papers.