Figure 2. Gas-cap drive reservoir (Modified from After Clark, N.J., Elements of Petroleum Reservoirs, SPE, 1969)

Drive Mechanisms in Reservoirs

The fluids in reservoir rocks are trapped within the pores of the rocks and will require sustained drive (i.e. energy) to be produced or flow out of the rocks. This energy is commonly referred to as natural or primary energy, which is a result of all the events that occurred during the reservoir formation process…

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