Around 1917, a US Bureau of Mines study concluded that which method would increase oil recovery?

Around 1917, a US Bureau of Mines study concluded that which method would increase oil recovery?

• A. Hydraulic Fracturing
• B. Natural Gas Injection
• C. Steam Flooding
• D. Water Flooding

Answer: (B)

The idea being tested is using injected gas to push oil out of the reservoir and keep production from fading as pressure drops. In 1917, the US Bureau of Mines identified natural gas injection as a way to raise oil recovery because adding gas into the reservoir provides a driving force that helps displacement of oil toward the producing wells, counteracting pressure decline from primary production. This approach can also help improve the sweep of the reservoir, making the displacing gas push more oil from areas that would otherwise be bypassed. Gas injection was an early method for enhanced oil recovery, offering a practical means to maintain pressure without on-site steam or large water volumes. While water flooding and steam flooding are important recovery techniques, they became prominent later; hydraulic fracturing is a more modern stimulation method.

The idea being tested is using injected gas to push oil out of the reservoir and keep production from fading as pressure drops. In 1917, the US Bureau of Mines identified natural gas injection as a way to raise oil recovery because adding gas into the reservoir provides a driving force that helps displacement of oil toward the producing wells, counteracting pressure decline from primary production. This approach can also help improve the sweep of the reservoir, making the displacing gas push more oil from areas that would otherwise be bypassed. Gas injection was an early method for enhanced oil recovery, offering a practical means to maintain pressure without on-site steam or large water volumes. While water flooding and steam flooding are important recovery techniques, they became prominent later; hydraulic fracturing is a more modern stimulation method.