Influencing factors of the calculation of the liquid yield of oil wells using the indicator diagram

The indicator diagram analysis and calculation of oil wells are carried out according to the well-head load and the displacement sensor data at well head. There are many factors of influencing the indicator diagram and the liquid yield calculation result because of the complexity of oil well production process. The factors are analyzed from three aspects of the liquid yield calculating method, oil well size data and ground data collecting, and the problems which should be paid attention in practical application are pointed for improving the accuracy of calculating the liquid yield of oil wells using the indicator diagram.