Modelling Reservoir Behaviour During Stimulation Tests at Habanero #1

Abstract

This study was to characterise the underground heat-exchange reservoir at Habanero #1 well operated by Geodynamics Ltd. Several threedimensional coupled mechanical/fluid 3DEC models have been studied to understand the rock mass reaction to the stimulation tests that were conducted in November-December, 2003. The microseismic monitoring results by Tohoku University and the falloff test results on 12 December 2003 were used to estimate some key input parameters for the numerical modelling. The seismic results were also used as benchmarks for model verification tests. Different fracture orientations, rock mechanical properties and fluid properties were used in this study to investigate the effect of varying these parameters on rock mass response to fluid injection. The study provided an improved understanding of the fracture system that was activated during the stimulation tests.