Advertisement

Journal of Failure Analysis and Prevention

, Volume 14, Issue 5, pp 675–682 | Cite as

Subsea Sampling Mitigation of ASD Failures During Commissioning of a New Oil/Gas Production Field

  • D. Ifezue
  • F. H. Tobins
Technical Article---Peer-Reviewed
  • 115 Downloads

Abstract

Acoustic sand detectors (ASDs) for subsea well jumpers for a new oil/gas field failed to detect sand production rates during commissioning but rather was picking up ROV noise with potential impact on the integrity of infield piping and components. Erosion assessment using commingled sand content from topsides ASD indicated that erosion rate was insignificant. However, given that sand production was also expected to spike during the early production phase, subsea sampling (from the subsea sample vessel, located on the test header) was also required in order to determine sand production levels from individual wells, thereby informing the decision to bring on new wells and to determine the appropriate choke settings. Subsea sampling also gives the required information on H2S, CO2, Water chemistry, Water cut, Asphaltene, Wax and Radioactive tracers some of which are used for corrosion and for base management. This paper describes the activities required before, during and after subsea sampling, in addition to the testing scope and the reporting requirements for the test results. Availability of off-the-shelf technology for subsea sampling online instrumentation should assist resolution of similar commissioning failures.

Keywords

Chemical analysis techniques Corrosion failure analysis Sensor failure 

References

  1. 1.
    I. Meric, G. Johansen, M. Holstad, J. Wang, R. Gardner, Produced water characterization by prompt gamma-ray neutron activation analysis. Meas. Sci. Technol. 22(12), 125701–125701 (2011)CrossRefGoogle Scholar
  2. 2.
    M. Halstensen, B. Arvoh, L. Amundsen, R. Hoffmann, Online estimation of wax deposition thickness in single-phase sub-sea pipelines based on acoustic chemometrics—a feasibility study. Fuel 105, 718–727 (2013)CrossRefGoogle Scholar
  3. 3.
    B. Mizaikoff, Mid-infrared evanescent wave sensors—a novel approach for subsea monitoring. Meas. Sci. Technol. 10(12), 1185–1194 (1999)CrossRefGoogle Scholar
  4. 4.
    Sand Production Pipe Saver (SPPS) V3.4, Erosion Corrosion Research Center, University of Tulsa, USAGoogle Scholar
  5. 5.
    NACE MR0175/ISO15156-2, Part 2: Cracking-Resistant Carbon and Low Alloy Steels, and the Use of Cast IronsGoogle Scholar

Copyright information

© ASM International 2014

Authors and Affiliations

  1. 1.Intec Sea UK LtdSurreyUK
  2. 2.Department of Mechanical EngineeringUniversity of AbujaAbujaNigeria

Personalised recommendations