Estimating Flow Performance of IDDP-2/DEEPEGS Well by Introducing Local Injectivity Indexes for Different Reservoir Depths

Abstract

The goal of the Iceland Deep Drilling Project (IDDP) is to get appropriate understanding of supercritical reservoirs with ultra high temperatures (400-550 ℃). It is a huge potential of increasing the power output from one geothermal well in such reservoirs. There is always very interesting to know the prognosis for production potential and the energy content of hot producing wells in geothermal industry. Injectivity testes on cold wells are normally performed to get indications of the production potential. Despite the fact that data acquisition and stimulation activities of IDDP-2 well on Reykjanes have met several challenges, still a significant amount of valuable data are collected. These data include several fixed-rate injection tests with combined pressure and temperature measurements, spinner log runs, water table measurements and temperature survey under shut in condition. The injectivity index provides an overall representation of the total well response and will normally not indicate zonal potential or contribution from various feed zones. This work uses existing data as temperature, pressure and different flow rates during injectivity tests to point out local injectivity indexes. The fact that the pressure inside the well is different during the different injection rates are used in the prediction. The local injectivity indexes are used to predict the potential for hot production from the different production zones of the IDDP-2/DEEPEGS well.