دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the increase in the temperature of the earth with increasing depth. It averages about 1�F per 60 feet (1�C per 18.3 metres),but may be considerably higher or lower.

n: 1.The rate of increase in temperature per unit depth in the Earth. Although the geothermal gradient varies from place to place, it averages 25 to 30 oC/km [15 oF/1000 ft]. 2.The natural increase of temperature with depth in the earth. Temperature gradient

the gradient reflecting the amount of temperature rise as the well depth increases. Normally about 1.1 to 1.8o F per 100 ft of true vertical depth increase.

n: a survey run in cased holes to locate the top of the cement in the annulus. Since cement generates a considerable amount of heat when setting, a temperature increase will be found at the level where cement is found behind the casing.

n: A record of the temperature gradient in a well. The temperature log is interpreted by looking for anomalies, or departures, from the reference gradient. This reference might be the geothermal gradient, a log recorded before production started or a log rec

a measurement of temperatures along the wellbore. Useful for determining temperatures at any point, static and circulating temperature and tops of cement column. May also be used to locate the top of a fracture if run soon after the frac.