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Influence of temperature sensor design on quality of wellbore measurements

Authors: V.F. Nazarov, V.K. Mukhutdinov (Bashkir State University, RF, Ufa), F.F. Azizov, K.R. Ahmetov (Surgutneftegas OJSC, RF, Surgut)

Key words: temperature logging, temperature sensor, injection, well, tubing.

The paper presents the results of measurements of contemporary complex tools which contain temperature channel. It is shown that the design of the tool, in particular, the location of the temperature sensor is very inefficient. This leads to mixing of fluids in the wellbore and recording distorted temperature. As a result, the conclusion on the state of the wellbore and reservoir is wrong.
References
1. Valiullin R.A., Termicheskie metody diagnostiki neftyanykh plastov i skvazhin (Thermal methods of diagnostics of oil reservoirs and wells): Thesis of the doctor of technical science, Tver', 1996.
2. Nazarov V.F., Termometriya nagnetatel'nykh skvazhin (Thermometry of injection wells): Thesis of the doctor of technical science, Ufa, 2002.
3. Patent no. 2121571 RF, MKI3 E 21 47/00, 47/10, 47/06,Method of investigating injection wells (versions), Inventors: Nazarov V.F., Valiullin R.A., Azizov F.F. et al.

Key words: temperature logging, temperature sensor, injection, well, tubing.

The paper presents the results of measurements of contemporary complex tools which contain temperature channel. It is shown that the design of the tool, in particular, the location of the temperature sensor is very inefficient. This leads to mixing of fluids in the wellbore and recording distorted temperature. As a result, the conclusion on the state of the wellbore and reservoir is wrong.
References
1. Valiullin R.A., Termicheskie metody diagnostiki neftyanykh plastov i skvazhin (Thermal methods of diagnostics of oil reservoirs and wells): Thesis of the doctor of technical science, Tver', 1996.
2. Nazarov V.F., Termometriya nagnetatel'nykh skvazhin (Thermometry of injection wells): Thesis of the doctor of technical science, Ufa, 2002.
3. Patent no. 2121571 RF, MKI3 E 21 47/00, 47/10, 47/06,Method of investigating injection wells (versions), Inventors: Nazarov V.F., Valiullin R.A., Azizov F.F. et al.


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