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Temperature measurements to a depth of 595 feet were made during a period of 6 years after the drilling of a 2,900-foot well near the Arctic coast at Barrow, Alaska. The temperature-time curves for depths from 295 to 595 feet fit a simple two-parameter logarithmic formula within instrumental error (±0.01° C) for data taken during the last 4)£ years. This formula, which is of the type proposed by Bullard, is based upon a highly simplified theoretical model of the thermal history of the well. The general features of the temperature-time curves for earlier times can be explained in terms of the various physical factors neglected in the simplified model. The analysis indicates that the thermal disturbance decreased from about 20° C to about 0.1° C in the 6-year period following drilling. It is estimated that about 50 years will elapse between the time of drilling and the time the temperature disturbance caused by drilling diminishes to 0.01° C in the depth range studied. This work probably forms an adequate basis for the study of secular changes in ground temperature that are measurable during the period of observation. Such changes have been observed at all depths from 75 to 275 feet.

Dissipation of the temperature effect of drilling a well in Arctic Alaska