Heating effect in conditions when bottom hole flowing pressure is below bubble point

[Natalija]

Hi! I am doing production log interpretation (multilayer reservoir) and i have rather unusual behavior:
-Temperature increase despite bottom hole flowing pressure is below bubble point pressure and two phases are entering the well (oil and gas). this temperature increase (for 0.8oC) from last measurement when bottom hole flowing pressure was above bubble point pressure
-water inflow is app 2m3 and water increased from last measurment but not enough to provoke this heating of 0.8C
-in this layer pressure is supported by water injection and in this zone where water occurs injection rate is highest

I hope you will give some explanation

[moscow01]

It could be flow behind pipe? Check your USIT or CBL and see if you have a good cement job. If you have water coming from a deeper one it could influence the temperature log. Depending on how deep your log went past perforation, you can also check the temperature log for any increase between static and flowing passes. If you don't have flow behind pipe then the temperature log for the section below perforation should be the same for static and flowing.