Abstract: The natural gas wells in Daqing Oilfield are mostly deep gas wells and the reservoir conditions are complex. Understanding the gas production profiles of deep gas wells is crucial for improving the development of gas wells. Production Log-grog Tool(PLT) production logging combination instrument has the characteristics of high temperature and high-pressure resistance, high measurement accuracy and high threephase flow recognition rate. The application results indicate that the combination of spot measurement and continuous test and the selection of well logging speed are the key to ensure the test results of the gas production profile of the PLT production logging combination instrument. The PLT production logging combination instrument can accurately determine the main gas production layer and water production status of deep gas wells, and has a wide application prospects in deep gas production profile testing.