A multiphase flow is frequently surveyed with combinations of flow rate flow composition, and temperature logs. Of these, the temperature log is the most representative of the long-term wellbore state. The flow rate and flow composition logs respond to the instantaneous properties of the flow when the logs are recorded, and may not represent average wellbore behavior. Although it is tempting to interpret the flow rate log first, experience shows that the most reliable interpretations are obtained from analyzing the temperature log first, followed by the flow composition log. These interpretations promote an understanding of the flow rate log and its limitations. Various log examples and illustrations demonstrate the pivotal role of the temperature log. In addition, recommended logging procedures for maximizing the benefits from the temperature log are provided, and important limitations of the flow rate logs are discussed and summarized.

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