Secondary extraction of petroleum A Occurs immediately after

Secondary extraction of petroleum. A) Occurs immediately after primary extraction B) Is less expensive than primary extraction C) Uses solvents, water, or steam D) Allows the oil to be extracted to the last drop E) Causes less environmental damage than tertiary extraction Since 1970 the rate of new discovery of oil has declined. A) True B) False Photochemical smog is formed when primary air pollutants interact with. A) Sunlight B) Water C) Air D) Moisture E) Gases As a result of air pollution in urban areas, more children have A) Emphysema B) Asthma C) Malaria D) Schistosomiasis E) Sickle-cell Using high pressure liquids to extract oil from rocks such as oil shale is known as. A) Outflow washing B) Primary oil recovery C) Hydraulic fracturing D) Internal combustion E) Scrubber technology

Solution

Option a is correct. After primary extraction the natural processes fall down. Secondary extraction depends on the mechanical processes to increase the pressure in the well.