Word: provenances
(lookup in dictionary)
(lookup stats)
Dates: during 1970-1979
Sort By: most recent first
(reverse)
...open to objection. Its demand estimates assume a free world economic growth averaging 4.4% a year, which some experts consider high. It also assumes that no more than 20 billion bbl. per year-the equivalent of two Alaska North Slopes-can be added to the world's proven oil reserves. Some other studies have suggested that the amount of oil waiting to be found is much higher. Wilson says that the report was intended less as prophecy than as a call to action. It advocates unprecedented international cooperation in devising new technologies, sharing existing resources and enforcing conservation...
Probable Output. As a rule, oilmen use two basic figures in assessing world oil potential: proven reserves and possible, or probable, reserves. Proven reserves are figured by many oil geologists at 640 billion bbl., almost a 30-year supply at current consumption rates-but despite the name they are scarcely "proven" in the sense that a proposition in Euclidean geometry is; they are really only estimates based on the best available evidence. To determine proven reserves, geologists study earth strata by drilling for rock and fluid samplings. Often calculations predict probable output by comparing it with production from similar fields...
Because of their imprecise nature, estimates of oil resources tend to gyrate wildly. At first, the oil reservoirs under the British sector of the North Sea were estimated to be 15 billion bbl. Now they are regarded to be at least 33.75 billion bbl.-and the figure is climbing. Proven oil reserves in Mexico and the waters off its coast have been revised from 7 billion bbl. to about 11 billion bbl. Still, the established fields remain the citadels of proven resources (see map): the Middle East (with 368 billion bbl.), followed by the Soviet Union (78 billion bbl.), Africa...
Susan F. Lyman '36, chairman of the Radcliffe Board of Trustees, said yesterday the 1971 agreement was made under the assumption at the time that Radcliffe would not be able to survive independently. But, Lyman said, a reevaluation conducted over the past five years has proven otherwise...
...might have made a passable attorney; he has proven an entertaining and invaluable witness...