«Oilfield engineering»

Experimental study of the temperature field in a well with behind-the-casing flows during induction heating of the casing string

UDC: 550.3
DOI: -

Authors:

¹ Ufa University of Science and Technology, Ufa, Russia

Keywords: thermometry, temperature sensors, behind-the-casing flows, multi-sensor equipment, induction heating, field geophysical well studies

Annotation:

The authors of the article present the results of researches of a producing well model, conducted on the laboratory installation, in order to watch the formation of the temperature field during a casing string induction heating in conditions of behind-the-casing flows presence but without their inflow into the casing string. An azimuthally distributed temperature probe measuring the temperature of the casing string inner wall was used in the model to register the distribution of the thermal field. The use of clamp-on thermally insulated temperature sensors allows reducing the thermal influence of the flow inside the wellbore and measure directly the temperature of the casing string, which provides the solution of the problem of determining behind-the-casing flows above the perforation intervals, below the perforation intervals as well as flows without entering the casing string, i. e. determining sources of freshwater horizons salinization. Azimuthally distributed temperature sensors make it possible to identify the channel of fluid overflow with high accuracy. It is revealed that for more effective determination of the behind-the-casing liquid flow channels, the minimum allowable number of clamping temperature sensors should be no less than four.

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