PEH:Immiscible Gas Injection in Oil Reservoirs


The conceptual aspects of the displacement of oil by gas in reservoir rocks are discussed in this section. There are three aspects to this displacement: gas and oil viscosities, gas/oil capillary pressure (Pc) and relative permeability (kr) data, and the compositional interaction, or component mass transfer, between the oil and gas phases. The first two topics are discussed in this section; the third is discussed in the next section. Gas/Oil Viscosity and Density Contrast One must first understand the viscosity and density differences between gas and oil to appreciate why the gas/oil displacement process can be very inefficient. Gases at reservoir conditions have viscosities of 0.02 cp, whereas oil viscosities generally range from 0.5 cp to tens of centipoises.

  Geologic Time: Phanerozoic > Mesozoic (0.45)
  Industry: Energy > Oil & Gas > Upstream (1.00)
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