ReactWell’s (RW) internationally patent pending technology produces liquid crude oil in the presence of water by combining biomass, gravity and geothermal heat in an underground geo-thermochemical reactor system. Geo-thermochemical technology naturally generates the pressure and temperature required for sub-surface biomass conversion reactions to proceed through to completion by using the injected biomass’ hydraulic head for pressure and geothermal energy of the surrounding rock for heat. Additionally, biomass productivity is increased by feeding algae geofluid CO2, reaction by product CO2 and geofluid carbonates