What is the purpose of enhanced oil production, and how does it differ from primary production?

• A. It is used to get more of the oil from reservoirs; it uses injected fluids like steam, water, CO2, or nitrogen.
• B. It relies on natural reservoir pressure alone, with no injection.
• C. It refines crude oil into fuel products.
• D. It involves transporting oil to market.

Answer: (A)

Enhanced oil production aims to pull more oil out of a reservoir by injecting fluids such as steam, water, CO2, or nitrogen to push oil toward production wells and to maintain reservoir pressure. This approach contrasts with primary production, which relies on the natural energy stored in the rock and fluids and does not involve injecting fluids; once the natural pressure drops, production falls off. By using injected fluids, operators can mobilize and recover oil that primary production would leave behind, extending the life of the reservoir. The other options describe refining crude into fuels or transporting oil, which are different stages of the oil industry, or simply relying on natural pressure without injection—part of primary production.