CO2 Sequestrated EOR

With reference to the effect of expansion on crude-oil, whether, the residual oil in the reservoir after water flooding remains to be inversely proportional to the expansion coefficient?

In other words, whether, the greater the expansion, the lesser the residual oil in the reservoir?

With reference to the effect of expansion on crude-oil, if the dissolution of CO2 in oil droplets displaces brine from the pore space, then, would it result in a process, where the water-wet system becomes a drainage rather than water absorption?

Again, with reference to the effect of expansion on crude-oil, whether, the relative permeability curve of oil discharge would remain to be higher than that of oil suction, creating an expedient flow environment under any given saturation condition?

In essence, whether, the volume expansion could significantly increase the oil saturation and formation elastic energy of the reservoir on one hand, while, the remaining oil after expansion could be separated, or, at least, partially separated from the formation water and become mobile oil easily?

Dr Suresh Kumar Govindarajan

Professor [HAG]

IIT–Madras

04-March-2025