7. The porous and permeable rock where commercial volumes of hydrocarbons accumu
ID: 1766376 • Letter: 7
Question
7. The porous and permeable rock where commercial volumes of hydrocarbons accumulate at depth is called the? a. reservoir b. trap C. SOurce seal 8. Which of the following applies to the formation of oil at depth? a. oil may form at any deptlh b. oil formation requires temperatures 50° C c. oil forms within a specific depth and temperature window d. none of the above 9. What is the general relationship between depth of burial and porosity for sediments deposited in a basin? a. porosity increases with depth of burial b. porosity decreases with depth of burial c. there is no relationship between depth of burial and porosity d. none of the above 10. Which of the following fuels produces the least amount of CO2 per BTU's of energy produced a. Lignite coal b. Anthracite coal c. Gasoline d. Natural Gas 11. During the past 400000 years of earth history a. Temperature and atmosphere CO2 concentration have been constant b. Temperatures on average have been much warmer than present day c. When atmosphere CO2 increases temperature increases d. None of the above 12. If ocean water albedo is 0.10 and ice or snow albedo is 0.50 what impact does melting of the Arctic ice cap have? a. A decrease in solar radiation absorbed by the Arctic Ocean b. An increase of solar radiation reflected by the Arctic Ocean c. No change as water and ice are different phases of the same substance d, A 60% increase of solar radiation reflected by Arctic OceanExplanation / Answer
7. A reservoir rock is the rock that has sufficient porosity and permeability to permit the storage and accumulation of crude oil or natural gas under adequate conditions, and to yield commercial hydrocarbons.
8. oil forms within a specific depth and temperature window.
9. porosity decreases with depth of burial.
In sediments compacted under self-weight, especially in sedimentary basins,the porosity profiles often show an exponential decrease with depth.
10. Natural gas produces the least amount of CO2. Natural gas has a higher energy content compared to other fuels, therefore it has a relatively lower CO2-to-energy content.
11. When atmosphere CO2 increases temperature increases. CO2is transparent to solar radiation but it absorbs infrared radiation. Thus, the presence of CO2 in our atmosphere allows sunshine to penetrate to the surface but inhibits the emission of infrared radiation to space.
12. When the ice cap melts, dark ocean water is exposed. Because all these changes make the surface darker, the albedo is lower, more solar energy is absorbed, and less is reflected.
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