单词 | oil trap |
释义 | > as lemmasoil trap oil trap n. (a) a device in which oil can be trapped, or which makes use of oil to trap something else; (b) Geology an underground rock formation in which an accumulation of oil is trapped; cf. trap n.1 8c. ΚΠ 1863 Sci. Amer. 10 Oct. (heading) 231/2 A coal oil trap.] 1927 Science 29 July p. vii (advt.) A separate oil trap, for insertion in the line, protects same from oil invasion. 1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles xii. 282 Salt-dome structures..commonly give rise to oil traps, salt being capped by gypsum. 1993 P. Kearey Encycl. Solid Earth Sci. 141/2 Various lines of evidence suggest that crude oil is derived from source sediments and migrates into reservoir rocks to form accumulations beneath oil traps. oil trap c. Geology. An underground rock formation in which an accumulation of oil or gas is trapped; so oil trap. ΘΚΠ the world > the earth > structure of the earth > structural features > formations by contents > [noun] > containing minerals field1672 oil pool1863 oil sand1875 trap1920 source rock1931 trend1939 the world > the earth > minerals > mineral sources > [noun] > source rock > containing oil or gas reservoir1847 oil pool1863 reservoir rock1877 pool1902 trap1920 trend1939 1920 Econ. Geol. XV. 249 Trap structures contain the majority of the important accumulations of oil. 1938 D. Hager Pract. Oil Geol. (ed. 5) iii. 56 Areas of heavily metamorphosed rocks the unfavorable for gas and oil accumulations, unless the oil has migrated to traps in such rocks. 1946 Nature 28 Dec. 931/2 In considering the distribution of structures which might act as oil-traps, the field of inquiry may be limited to those geological formations which provide some indication of the presence of oil. 1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles xii. 282 Salt-dome structures..commonly give rise to oil traps, salt being capped by gypsum. 1977 Offshore Engineer May 38/1 Seismic evidence suggests thick deeply buried deposits onlapping old ridges which may form hydrocarbon traps. < as lemmas |
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