Objectives • Chevron’s reservoir engineers requested specialist services for their Gorgon flow back campaign (eight wells) • The challenge for each flow back was to acquire quantification and composition of condensed water and reliable measurement of mercury content in the produced gas Expro Excellence • Technology used: Expro Petrotech IsoSplit ® wellhead sampling; Expro Petrotech Multi- Ion Analyser; Expro Petrotech Mercury in Gas Analysis • Expro Petrotech IsoSplit wellhead sampling is a unique solution for condensed water measurement – it’s principle use is for accurate condensate/gas ratio (CGR) measurement and the collection of high quality equilibrium separator samples, but water/gas ratio (WGR) can also be quantified during the flashing of the IsoSplit process unit • Gave the best insight to condensed water levels, especially when incorporated with the salinity and multi-ion analysis results • Fast report turnaround – “detail and quality of the reports were outstanding” • 100% performance score over eight wells Value to client • Without reliable data, production problems could occur once feeds come online – smart planning by harvesting quality data in the lead up to the production phase will mitigate against unforeseen process costs in the future • Chevron commented that the onsite mercury analysis provided the best representation to date of the field mercury in gas levels • Engineering team had a much better understanding of individual well characteristics and overall field performance • Excellent communication with the onsite Fluids team, coupled with initiative and willingness to be adaptive led to progressive improvements in the sampling programme Fluids Expro Excellence exprogroup.com / Expro Excellence Expro’s adaptive and flexible approach to fluid sampling and onsite analysis results in 100% performance score over eight wells by Chevron, providing them with the best fluids representation to date for the Gorgon field Fluids Fluid Sampling & Analysis Contact For further information, please contact: Brian Toole Region Product Line Manager, Asia Fluids [email protected] Dolores Sarical Technical Sales Manager, Asia Fluids [email protected] www.exprogroup.com/fluids IsoSplit wellhead sampling gave the best insight yet into condensed water levels, particularly once salinity and Multi-Ion analysis results were incorporated. It also allowed us to compare CGRs on a like-for-like basis between wells since the separator conditions of the minilab were held constant. IsoSplit wellhead samples and recombined separator samples proved to be the most effective way of capturing representative samples when compared with the compositional results of samples captured using alternative methods.

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Objectives

• Chevron’s reservoir engineers requestedspecialist services for their Gorgon flowback campaign (eight wells)

• The challenge for each flow back was toacquire quantification and composition ofcondensed water and reliable measurementof mercury content in the produced gas

Expro Excellence

• Technology used: Expro Petrotech IsoSplit®wellhead sampling; Expro Petrotech Multi-Ion Analyser; Expro Petrotech Mercury inGas Analysis

• Expro Petrotech IsoSplit wellhead samplingis a unique solution for condensed watermeasurement – it’s principle use is foraccurate condensate/gas ratio (CGR)measurement and the collection of highquality equilibrium separator samples, butwater/gas ratio (WGR) can also bequantified during the flashing of the IsoSplitprocess unit

• Gave the best insight to condensed waterlevels, especially when incorporated withthe salinity and multi-ion analysis results

• Fast report turnaround – “detail and qualityof the reports were outstanding”

• 100% performance score over eight wells

Value to client• Without reliable data, production problemscould occur once feeds come online –smart planning by harvesting quality data inthe lead up to the production phase willmitigate against unforeseen process costsin the future

• Chevron commented that the onsitemercury analysis provided the bestrepresentation to date of the field mercuryin gas levels

• Engineering team had a much betterunderstanding of individual wellcharacteristics and overall field performance

• Excellent communication with the onsiteFluids team, coupled with initiative andwillingness to be adaptive led toprogressive improvements in the samplingprogramme

FluidsExpro Exce l lence exprogroup.com

/ Expro Excellence

Expro’s adaptive and flexible approach to fluidsampling and onsite analysis results in 100%performance score over eight wells byChevron, providing them with the best fluidsrepresentation to date for the Gorgon field

FluidsFluid Sampling & Analysis

ContactFor further information, please contact:

Brian TooleRegion Product Line Manager, [email protected]

Dolores SaricalTechnical Sales Manager, [email protected]/fluids

IsoSplit wellhead sampling gave the best insight yet intocondensed water levels, particularly once salinity and Multi-Ionanalysis results were incorporated. It also allowed us tocompare CGRs on a like-for-like basis between wells since theseparator conditions of the minilab were held constant. IsoSplitwellhead samples and recombined separator samples provedto be the most effective way of capturing representativesamples when compared with the compositional results ofsamples captured using alternative methods.

Chevron Gorgon Field Case Study_A4 01/04/2015 12:19 Page 1