Title : Impact of heat management on energy and environmental efficiency in hybrid steam-flue gas and conventional steam injection processes
The growing worldwide concern of the different industries to minimize the effect of their operations on the environment has led them to reconsider the way in which most industrial processes are carried out and evaluate them from the perspective of energy efficiency. In this line, the hydrocarbon industry tries to optimize its conventional recovery processes and the injection of steam and combustion gases (80-85% nitrogen and 15-20% carbon dioxide), represent an alternative to optimize efficiency. energy and environmental aspects of the conventional steam process, since, by substituting volumes of steam for combustion gases, the consumption of vaporized water is reduced, however, to date the hybrid process has not been evaluated considering the management of the energy, which would mean an additional and substantial saving in energy. This work proposes, using Newman’s analytical model, to calculate the reduction of the steam injection rate over time and through the calculation of numerical indicators to quantify its incidence on the energy and environmental performance of the conventional and hybrid process. A conceptual simulation numerical model was built, representative of a Colombian heavy oil field, in which different scenarios were evaluated, considering continuous steam injection and the hybrid process, with and without energy management. The steam injection schedules with the reductions in the injection rates were calculated with the analytical model and were implemented in the different simulation scenarios and through energy balances that quantify the energy supplied to the process through the injection fluids and the energy produced. Through the conversion of recovered crude oil barrels into energy and balances of CO2 emissions, considering the emissions during the generation of steam and the savings due to the reduction of the rate, it was possible to reduce energy requirements and the environmental impact compared to steam base scenario, by up to 40%.
What will audience learn from your presentation?
• Understand how the use of analytical models to calculate the steam injection rate in hybrid and conventional processes increases the energy efficiency of the process and decreases carbon intensity.
• Learn about the use of simple numerical indicators for monitoring energy and environmental efficiency in steam injection and flue gas hybrid processes