Geothermal energy production at geologic CO_2 sequestration sites: Impact of thermal drawdown on reservoir pressure

摘要

Recent geotechnical research shows that geothermal heat can be efficiently mined by circulating carbon dioxide through naturally permeable rock formations - a method called CO_2 Plume Geothermal - the same geologic reservoirs that are suitable for deep saline aquifer CO_2 sequestration or enhanced oil recovery. This paper describes the effect of thermal drawdown on reservoir pressure buildup during sequestration operations, revealing that geothermal heat mining can decrease overpressurization by 10% or more.