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Ultrasonic Flow Metering Device and Field Trial Success at Sour Gas Field Development

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Abstract

Gas production rate measurement is one of the key tasks in any gas field development, particularly when the field is just put on production. It aims to develop a baseline for sustaining production, managing reservoir depletion, extending plateau production, and accounting/reporting purpose. For a sour gas field development, when the conventional devices such as the target flow meters are installed downstream the wellhead, they are exposed to “debris” such as precipitated elemental sulfur, MEG, corrosion inhibitor, formation solids, water, etc. Any debris in the gas flow, particularly in high gas rate wells, can hit the sensor and cause either temporary or permanent damage. As a result, it has led to a less reliable or inaccurate reading. Abnormal reading may eventually lead to a poor production optimization action/decision. This paper is to present the practical data for several different measuring devices used, and more importantly, the recent field trial of the new measurement technology (i.e., ultrasonic flow meter). With a proper installation and calibration, ultrasonic flow meters have proven a reliable reading device compared to that of the conventional ones. It is even more impressed when the liquid phase is removed, and the reading error is less than 1%. For multiple-phase production stream, the error is consistently ~10%, which can be further improved by calibration with routine well tests. Besides of good accuracy, ultrasonic flow meter shows several advantages. It is safe to be used in the sour gas field development since there is no direct exposure with sour gas and thus, no need to open the production system/pipeline during installation, measurement, and maintenance. Maintenance is also simpler that there is no need to perform any isolation and/or conduct a routine purge job on pipeline.

Keywords

  • Ultrasonic flow meter
  • Measurement design
  • Cost management
  • Risk management
  • Sour gas field development
  • Methyl ethyl glycol MEG

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References

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Acknowledgements

The authors thank UECSL and CNPC for their permission to publish this paper. The authors also thank all the personnel, particularly field operators, who involved in the data collection at the field site and providing suggestions to the design of the real-time visualization system.

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Correspondence to Yue Yu .

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Yu, Y., Vo, M., Zheng, S., Zhang, J. (2019). Ultrasonic Flow Metering Device and Field Trial Success at Sour Gas Field Development. In: Shemwell, S., Lin, J. (eds) Proceedings of the International Petroleum and Petrochemical Technology Conference 2018. IPPTC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-2173-3_9

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  • DOI: https://doi.org/10.1007/978-981-13-2173-3_9

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  • Publisher Name: Springer, Singapore

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  • Online ISBN: 978-981-13-2173-3

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