The Geoscience of In-Situ Combustion and High-Pressure Air Injection

Considering the global drive toward net-zero carbon emissions in near future, need to find clean sources of energy has never been more important. It is estimated that globally there are tens thousands depleted and abandoned oil fields may be adapted produce green energy. These re-cycled with help air injection, either from production hydrogen, as a direct result oxidation oil, or exploitation inherent increase heat flow pressure via enhanced geothermal systems. In past, use in-situ combustion (ISC) high-pressure injection (HPAI) have experienced many failures, largely due poor project design inappropriate reservoir selection. Here, we review data field applications, experimental studies, numerical modelling define roles sub-surface sedimentology petrophysics, structural geology, geomechanics, mineralogy, diagenesis, petroleum geology on success ISC HPAI. We show how current knowledge can mitigate failure improved initial Improvements implementation HPAI projects promise allow utilisation fields, added benefit cost-effective, materials efficient, re-use existing infrastructure. conclude integration data, laboratory experiments, methods previously studied used develop minimize risk failure.