Organic Oil Recovery (OOR) is a unique, tertiary enhanced oil recovery process. The fundamentals of the technology are based on the activation of microbial life resident in oil reservoirs with the purpose of increasing oil production. The technology can dramatically improve the mobility of oil trapped in tight pore spaces or on the oil-bearing rock to improve ultimate oil recovery. Through batch treating with carefully defined volumes of supplemental nutrients, the process significantly increases a specific microbial population. As part of their life cycle, those targeted microbes change in state from being Hydrophilic to being Hydrophobic through a process known as nutrient limitation. This change of state results in microbes moving to the oil/water interface, temporarily reducing surface tension, releasing and mobilising significant quantities of trapped and residual oil. Another important feature of the technology is its ability to tackle the root cause of H₂S formation by targeting specific species of microbes to outcompete Sulphate Reducing Bacteria (SRBs) which are a primary cause of this gas’s formation.