题目内容
（请给出正确答案）
Drilling oil wells was______work that he couldnt finish it by himself.
A．such difficult
B．such a difficult
C．so difficult a
D．so difficult
安装简答题APP，拍照搜题省时又省心！
更多“Drilling oil wells was______wo…”相关的问题
California has been facing a drought for many years now, with certain areas even having to pump freshwater hundreds of miles to their distribution system. The problem is growing as the population of the state continues to expand. New research has found deep water reserves under the state which could help solve their drought crisis. Previous drilling of wells could only reach depths of 1,000 feet, but due to new pumping practices, water deeper than this can now be extracted （抽取）. The team at Stanford investigated the aquifers（地下蓄水层）below this depth and found that reserves may be triple what was previously thought. It is profitable to drill to depths more than 1,000 feet for oil and gas extraction, but only recently in California has it become profitable to pump water from this depth. The aquifers range from 1,000 to3,000 feet below the ground, which means that pumping will be expensive and there are other concerns. The biggest concern of pumping out water from this deep is the gradual setting down of the land surface. As the water is pumped out, the vacant space left is compacted by the weight of the earth above. Even though pumping from these depths is expensive, it is still cheaper than desalinating（脱盐）the ocean water in the largely coastal state. Some desalination plants exist where feasible, but they are costly to run and can need constant repairs. Wells are much more reliable sources of freshwater, and California is hoping that these deep wells may be the answer to their severe water shortage. One problem with these sources is that the deep water also has a higher level of salt than shallower aquifers. This means that some wells may even need to undergo desalination after extraction, thus increasing the cost. Research from the exhaustive study of groundwater from over 950 drilling logs has just been published. New estimates of the water reserves now go up to 2,700 billion cubic meters of freshwater. 1 How could California's drought crisis be solved according to some researchers？
A、By building more reserves of groundwater.
B、By drawing water from the depths of the earth.
C、By developing more advanced drilling devices.
D、By upgrading its water distribution system.
Crude oil wells flow at varying rates, from ten to thousands of barrels per. hour. Petroleum products are always measured in 42-gallon barrels.
Petroleum products are different in physical appearance: thin, thick, transparent or opaque, but their chemical composition is made up of only two elements: carbon and hydrogen, which form. compounds called hydrocarbons. Other chemical elements found in union with the hydrocarbons are few and are classified as impurities. Trace elements are also found, but these are of such minute quantities that they are disregarded. The combination of carbon and hydrogen forms many thousands of compounds which are possible because of the various positions and joinings of these two atoms in the hydrocarbon molecule.
The various petroleum products are refined from the crude oil by heating and condensing the vapors. These products are light oils, such as gasoline, kerosine, and distillate oil. The residue remaining after the light oils are distilled is named as heavy or residual fuel oil and is used mostly for burning under boilers. Additional complicated refining processes rearrange the chemical structure of the hydrocarbons to produce other products, some of which are used to upgrade and increase the octane rating of various kinds of gasoline.
Which of the following is NOT true？
A．Crude oil is found below land and water.
B．Crude oil is always found a few hundred feet below the surface.
C．Pumping and pressure force crude oil to the surface.
D．A variety of petroleum products is obtained from crude oil.
Petroleum products vary greatly in physical appearance: thin, thick, transparent or opaque, but regardless, their chemical composition is made up of two elements: carbon and hydrogen, which form. compounds called hydrocarbons. Other chemical elements found in union with the hydrocarbons are few and are classified as impurities. Trace elements are also found, but these are of such minute quantifies that they are disregarded. The combination of carbon and hydrogen forms many thousands of compounds which are possible because of the various positions and joinings of these two atoms in the hydrocarbon molecule.
The various petroleum products are refined from the crude oil by heating and condensing the vapors. These products are the so-called light oils, such as gasoline, kerosene, and distillate oil. The residue remaining after the light oils are distilled is known as heavy or residual fuel oil and is used mostly for burning under boilers. Additional complicated terming processes rear~ range the chemical structure of the hydrocarbons to produce other products, some of which are used to upgrade and increase the octane rating of various types of gasoline.
Which of the following is NOT true？
A．Crude oil is found below land and water.
B．Crude oil is always found a few hundred feet below the surface.
C．Pumping and pressure force crude oil to the surface.
D．A variety of petroleum products is obtained from crude oil.
As a result of the recent energy crisis, new concepts for creating HDR recovery systems— which involve drilling holes and connecting them to artificial reservoirs placed deep within the crust—are being developed. In all attempts to retrieve energy from HDR's artificial stimulation will be required to create either sufficient permeability or bounded flow paths to facilitate the removal of heat by circulation of a fluid over the surface of the rock.
The HDR resource base is generally defined to include crustal rock that is hotter than 150℃, is at depths less than ten kilometers, and can be drilled with presently available equipment. Although wells deeper than ten kilometers are technically feasible, prevailing economic factors will obviously determine the commercial feasibility of wells at such depths. Rock temperatures as low as 100℃ may be useful for space heating; however, for producing electricity, temperatures greater than 200℃ are desirable. The geothermal gradient, which specifically determines the depth of drilling required to reach a desired temperature, is a major factor in the recoverability of geothermal resources. Temperature gradient maps generated from oil and gas well temperature-depth records kept by the American Association of Petroleum Geologists suggest that tappable high-temperature gradients are distributed all across the United States. (There are many areas, however, for which no temperature gradient records exist. )
Indications are that the IIDR resource base is very large. If an average geothermal temperature gradient of 22℃ per kilometer of depth is used, a staggering 13,000,000 quadrillion B. T. U's of total energy are calculated to be contained in crustal rock to a ten kilometer depth in the United States. If we conservatively estimate that only about O. 2 percent is recoverable, we find a total that is comparable to the estimated resource base of all the coal remaining in the United States. The remaining problem is to balance the economics of deeper, hotter, more costly wells and shallower, cooler, less expensive wells against the value of the final product, electricity and/or heat.
The primary purpose of the passage is to______.
A．alert readers to the existence of HDR's as an available energy source
B．document the challenges that have been surmounted in the effort to recover energy from HDR's
C．warn the users of coal and oil that HDR's are not an economically feasible alternative
D．encourage the use of new techniques for the recovery of energy from underground hot water and steam
It is profitable to drill to depths more than 1,000 feet for oil and gas extraction, but only recently in California has it become profitable to pump water from this depth.The aquifers range from 1,000 to3,000 feet below the ground, which means that pumping will be expensive and there are other concerns.The biggest concern of pumping out water from this deep is the gradual setting down of the land surface.As the water is pumped out, the vacant space left is compacted by the weight of the earth above.
Even though pumping from these depths is expensive, it is still cheaper than desalinating(脱盐)the ocean water in the largely coastal state.Some desalination plants exist where feasible, but they are costly to run and can need constant repairs.Wells are much more reliable sources of freshwater, and California is hoping that these deep wells may be the answer to their severe water shortage.
One problem with these sources is that the deep water also has a higher level of salt than shallower aquifers.This means that some wells may even need to undergo desalination after extraction, thus increasing the cost.Research from the exhaustive study of groundwater from over 950 drilling logs has just been published.New estimates of the water reserves now go up to 2,700 billion cubic meters of freshwater.
1.How could California’s drought crisis be solved according to some researchers?
A.By building more reserves of groundwater.
B.By drawing water from the depths of the earth.
C.By developing more advanced drilling devices.
D.By upgrading its water distribution system.
2.What can be inferred about extracting water from deep aquifers?
A.It was deemed vital to solving the water problem.
B.It was not considered worth the expense.
C.It may not provide quality freshwater.
D.It is bound to gain support from the local people.
3.What is mentioned as a consequence of extracting water from deep underground?
A.The sinking of land surface.
B.The harm to the ecosystem.
C.The damage to aquifers.
D.The change of the climate.
4.What does the author say about deep wells?
A.They run without any need for repairs.
B.They are entirely free from pollutants.
C.They are the ultimate solution to droughts.
D.They provide a steady supply of freshwater.
5.What may happen when deep aquifers are used as water sources?
A.People’s health may improve with cleaner water.
B.People’s water bills may be lowered considerably.
C.The cost may go up due to desalination.
D.They may be exhausted sooner or later.
Those against oil drilling in ANWR argue that ______.
A．it will drain the oil reserves in the Alaskan region
B．it can do little to solve U. S. energy problems
C．it can cause serious damage to the environment
D．it will not have much commercial value
The Deep Sea Drilling Project was significant because it was ______.
A．an attempt to find new sources of oil and gas
B．the first extensive exploration of the ocean bottom
C．composed of geologists from all over the world
D．funded entirely by the gas and oil industry
Those against oil drilling ANWR argue that ______.
A．it will drain the oil reserves in the Alaskan region
B．it can do little to solve U.S. energy problem
C．it can cause serious damage to the environment
D．it will not have much commercial value
How is crude oil brought to the surface？
A．Expansion of the hydrocarbons.
B．Pressure and pumping.
C．Vacuum created in the drilling pipe.
D．Expansion and contraction of the earth's surface.
A、Oil drilling platform power supply.
B、Marine testing equipment.
C、A and B.
D、--
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
微信搜一搜
简答题
微信搜一搜
简答题
如搜索结果不匹配，请 
