Reservoir and geomechanical simulation study of CO2 EGR at the shallow biogenic gas reservoir in Indonesia

Shallow biogenic gas fields are widely distributed in the world, but their development is limited due to their smaller scale and lower reservoir pressure compared to conventional gas fields. However, as the discovery of new reservoirs becomes increasingly challenging and the demand for gas as a clean energy source continues to rise, the development of shallow biogenic gas fields is necessary. Specially, the total biogenic gas reserves in Indonesia are around 152.9 TCF, and the contribution of biogenic gas to the total reserves is only around 7.2 TCF (4.7%). In this study, we conducted reservoir and geomechanical simulation studies for the enhancement of gas recovery and analysis of the geomechanical stability in Indonesian biogenic shallow gas field. Geomechanical analysis is essential because many shallow gas fields are consisted of unconsolidated sandstone.