Troubleshooting produced water—methods and lessons learned (Mar-2007) ///

The E&P industry is seeing a rise in produced water-treating problems, and guidance is needed in the literature on how to troubleshoot such problems. The experience of a Produced Water Task Group assembled to address water-treating issues on an FPSO offshore Brazil may be helpful in those regards. The Task Group was assembled in May 2005 to address problems associated with produced water treating and a growing inventory of off-spec water in the cargo tanks of an FPSO. While water production at the FPSO was still only one-quarter of the nameplate capacity, a significant fraction did not meet discharge quality requirements and had to be diverted to cargo tanks for later processing. The Task Group was formed to develop facilities, equipment and operations-based solutions. The FPSO uses some interesting features that are not typically seen in E&P facilities. Some of these are clever, while others have not worked well.

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