Challenge / Summary:

HSE – To negate the requirement for manual extraction and handling of samples which pose a risk to personnel due to the presence of TENORM, Mercury and H₂S.
Data Availability – To provide accurate PSD datasets in real-time as opposed to shipping samples onshore for lab analysis.

Solution:

• SMS mobilised and installed their Real Time Particle Size Analyser in an online, closed loop configuration to flow sample fluid from existing sample points through the analyser to closed drains.
• The package design specification incorporated a 3-phase side stream mini separator suitable for use under hazardous process conditions. The mini separator  ensured samples were suspended in stable base fluid (90% water) to enable accurate particle analysis and provided necessary pressure regulation.
• A batch sampling approach was utilised whereby a known volume of liquid was flowed through the analyser flowcell and the sand particles analysed on a per well basis.
• Particles of size range 0.7 - 300 microns were analysed and the respective imaging and distribution data output to a service PC in real time

Results:

• SMS successfully conducted real-time PSD analysis for 27 wells across the field.
• Throughout all phases of the operation, PSD analysis was conducted with a minimum of 6 litres of fluid, three times per well for verification of datasets and optimised data accuracy.
• All sample imaging was recorded in the acquisition software, thus enabling results to be optimised postjob through refinement particle filter thresholding.
• Dn and Dv (%) data outputs provided the client with invaluable data to support wellhead desander design specification

Value to Client:

• Reduced HSE Risk to Personnel
  - Closed loop system reducing risk of potential exposure to harmful contaminants
  
  
• Reliable Real-time Data
  - Immediate data analysis and availability, enabling dynamic decision making
  
  
• Reduced OPEX Cost
  - Minimal personnel and equipment required on-site
  
  
• Repeatable and Reliable
  - Batch sampling process is quickly repeatable, multiple runs per well for data averaging and obtaining representative results
  - PSD data obtained direct from well flowline upstream of any process / separation
  - Sufficient solids samples captured for representative sample data

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