Troubleshooting produced water—methods and lessons learned ///

This is the second and final part of a report on the troubleshooting efforts of a Produced Water Task Group that was assembled to address problems on an FPSO. While water production at the FPSO was still only one quarter of the nameplate capacity, a significant fraction of the treated produced water did not meet discharge quality requirements and had to be diverted to cargo tanks for later processing. In the cargo tanks, the oily water remained in an emulsified state. After several months of problems, the cargo tanks were beginning to fill, leaving no way to continue production at existing rates. The task group was formed to develop facilities, equipment and operations-based solutions. Part 1, in March, gave a summary of the system performance and an overview of the problems that were encountered in the field. The current article details the methods used to troubleshoot the problems...

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