As we can see from the real gas law (pv = nZRT), changes in Temperature (Delta-T) also alter the pressure/volume term, thus affecting #welltest pseudo-pressure and pseudo-time calculations. Pseudo-variables are used in #PTA to correct data for the fact that analytical equations (i.e. Darcy’s law) assume constant conditions. Electronic pressure gauges also measure temperature. A time/pressure/temperature data set should be provided. For purists, this is not a wet-gas temperature, it is the recorder housing temperature. There is a delayed response due to thermal conductivity or diffusivity of the housing itself. However, since these are the data we have available, we should use them! This would be analogous to converting gas (#LNG) flow rates to standard conditions or correcting gasoline volumes at the pump to a standard ambient temperature.