Thermal Data Trends are Useful for Welltest Diagnostics (#PTA). Another common effect is for the temperature data in gas (#LNG) wells to exhibit an increasing trend (i.e. less JT cooling) while pressure data continue a decreasing trend (i.e. greater drawdown). This #PTA example suggests that the near wellbore region was continually cleaning-up throughout the post-frac’ #welltest. Diagnosing this situation would be important for qualifying the magnitude of the skin effect and fracture flow parameters at the end of the test (conductivity, skin-on-the-fracture-face), hence the effectiveness of an hydraulic fracture stimulation treatment, and the long term transient deliverability forecast.