This paper discusses the field performance of a remotely operated bottom-hole pressure monitoring system installed in a subsea appraisal well in the North Sea. Topics covered include vessel station keeping requirements during system interrogation, data recovery utilizing subsea accoustic telemetry, performance of the wellhead mounted data acquisition units, and downhole pressure gauge and electrical circuit reliability.

The paper also describes several applications for using subsea exploration wells as remote bottom-hole pressure and temperature monitoring systems to aid in reservoir appraisal and development. Applications covered include interference testing, extended pressure build-up surveys and waterflood pressure response monitoring. Completion techniques and measurement and recording systems are discussed which will permit single or multi-zone pressure and temperature readings to be made over specified time intervals for static bottom-hole conditions up to 15000 psia and 300°F. In addition, methods of employing the pressure monitoring completion to perform drill stem tests are detailed.

Lastly, there is a discussion of recommended improvements to completion installation techniques and data logging capabilities which will enhance overall system reliability and usefulness.

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