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additional Alaska already amount annual approximately areas average basin billion barrels coal Committee complete cycle conterminous United continental continued Council crude oil cubic feet cumulative production curve decline deposits depth discovered discoveries Earth economic energy equation estimates example exist exploration exploratory drilling factor feet fields figure foot fuels future gas liquids given gives growth heat Hubbert identified increase industry initial known lignite liquids magnitude material maximum McKelvey means method metric mineral mineral resources mining natural gas natural-gas obtained occur oil and gas original peak percent period petroleum possible potential present probably proved discoveries proved reserves published quantities range ratio reached reason recoverable region represents rocks scale shale shows sources statistics submarginal supply tion tons trillion ultimate undiscovered volume Zapp
Page 217 - Proved Reserves of Crude Oil. Proved reserves of crude oil as of December 31 of any given year are the estimated quantities of all liquids statistically defined as crude oil, which geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions.
Page 3 - С calorie is defined as the amount of heat that will raise the temperature of 1 gram of water from 14.5 to 15.5° C, measured to be 4.1855 joules.
Page 35 - I (1914), the second from the beginning of World War I to the end of World War II (1914-45) , and the third from 1945 to the present.
Page 12 - ... x 10" thermal watts of tidal power from the combined kinetic and potential energy of the earth-moon-sun system. Of these inputs of thermal power, that from solar energy is overwhelmingly the largest, exceeding the sum of the other two by a factor of more than 5,000. Of the solar input, about 30%, the earth's albedo, is directly reflected and scattered into outer space, leaving the earth as...
Page 186 - In a paper given before the annual general meeting of the Canadian Institute of Mining and Metallurgy, held in...
Page 76 - Because of the similarity between the two curves, the discovery curve gives an approximate preview of the behavior of the production curve by the time-lead interval AŁ.
Page 22 - There, ten 5.000hp turbines were installed for the generation of AC power, which was transmitted a distance of 26 miles to the city of Buffalo. The subsequent growth of hydroelectric power in the United States is shown in Figure 27 and that for the world in Figure 28. In the United States, by 1970, the installed hydroelectric power capacity amounted to 53,000 megawatts, which is 32...
Page 173 - Personally, I am confident that for millennia to come we can continue to develop the mineral supplies needed to maintain a high level of living for those who now enjoy it and to raise it for the impoverished people of our own country and world.
Page 207 - ... his particular energy source. The short text accompanying each diagram outlines the method of estimation or the source of the estimate and defines the characteristics of each estimate. Where appropriate, comparisons with other estimates are also given. Resources, as used here, include all rocks and minerals (including their contained heat for geothermal sources) potentially usable by man.