Monitor Subcool – Increase Production by 20%

• Monitoring the Subcool provides the ability to boost

output while working in a safe operating range,

protectingyourassets.

Liner Plugging

• Bottomholepressurehelpeddeterminethedrawdown.

This helped determine when the liner was plugging

betweenthereservoirandthewellbore.

Monitor Lower Subcool Valves – Optimize Efficiency

• HighSOR(SteamOilRatio)gaveanexcellentindication

ofreservoirqualityandoperationalefficiency.

OBJECTIVES: Operational data provides the ability to maximize production

whileprotectingthedownholeassets.

GathercriticalperformancedataforthedesignandoperationoffutureSAGDprojects.

AccuratelymonitorsubcooltowardsachievinganoptimalSAGDoperationof0degSubcool.

Real time downhole Pressure / Temperature monitoring protects your assets, and provides information to increase your production.

The ERD™ sensor, accompanied by a custom designed tubing mandrel, isincorporated into thecompletionstringand run into thewellbore– inclusiveof cable andprotectors. The cable exits thewellhead viaapressurebarrierand connects to the MOREVision data acquisition unit. Sensors in thisconfigurationareutilizedforreservoirmonitoringandartificial liftmonitoringandoptimization.

MORET System (Tubing Conveyed)

High Temperature ESP Monitoring

KNOWING THE SUBCOOL IS MORE THAN JUST COOL

Ideal SubCool

“Thebiggestthingthatdownholeinstrumentation(P/T)givesusisthelinersubcool,ameasureoftheamountoffluidinyoursteamchamberabovetheproducerwell.ThebiggestrisktodamagingSAGDwellsisflashingsteamacrosstheliner,whichoccurswhenthefluidthatiscomingintothewelldropstoitssaturationpressureforthetemperatureitisatasitpassesthroughtheliner.Atthispoint,thefluidundergoesaphasechangefromliquidtovapor(steam),thusvelocityincreasessubstantiallyandcanwashoutliners,compromisingabilitytocontrolsand.Linersubcooliscalculatedastheassociatedsaturationtemperaturetotheproducingbottomholepressure,thensubtractingtheproducingbottomholetemperature(tellsyouhowfaryouarefromasaturatedsteamcondition).Forevery10degCoflinersubcool,thisrepresents1meteroffluidaboveyourproducingwell.Optimal(mostefficient)SAGDoperationisat0degCsubcool,howeverduetothenaturethatinstrumentationisnot100%accurate,wellsarenotflat(goupanddown),anddrawdownisnotevenlydistributedalongthewellpath,wetargetaminimumof10degClinersubcool,targeting20degCinthepastduetoourlackofreliabledownholeP/Tmeasurement.Withbetterinstrumentation,wewillpushsubcoolslowerthanwherewecurrentlyoperateasitismoreconservative.”“Bybeingabletoaccuratelyknowbottomholetemperatureandpressure,youcanoperateatlowersubcoolsbecauseyouhavetheconfidencethatyourcalculationsarecorrect.It’stoughtoputa%increaseonit,butattheendofthedayIfyoudon’tknowthesubcool,youoperatemuchmoreconservativelyandthusrequirealotmorewellstogetthesameamountofproduction.Morewellsmeanalotmorecapitalupfront,addedtothefactthatrunningathighersubcoolsislowerefficiencyinthethermalworld(higherSOR-steamoilratio,whichisakeymetricforcomparingeconomicsofdifferentplaysandgivesagoodindicationofreservoirqualityandoperationalefficiency).We’veeasilyhadwellswitha20%productionincreasebeingabletospeedthemupknowingthatyouarestillsafewhereyouareoperating,butotherwellsyoumayfindyouralreadyrunningatlowersubcoolsandseeminimalincrease.”

Customer Revelations

What is Subcool?

A Division of Core Laboratories Canada Ltd.

2100, 125 – 9th Ave S.ECalgary, Alberta+1(403) 571-1669

For more information, please visit our website at:www.promore.com

• Subcoolisthetemperaturedifferencebetweentheinjectedstreamandproducedfluid.

• Keeping production temperature below saturation temperature provides single-phaseflowconditionswhichprovidesmostefficientproduction.

• A controlled method with downhole P/T monitoring can be used to enhance uniformsteamchambergrowthandultimatelymoreoilproductionwithlesssteaminjection.

Optimal Steaming Process

• Distributedinjectionandproduction• Uniformsand-facepressuredistributionandliquidlevel• Limitingsteambreakthroughatproducersorfloodingatinjector

Steam ChamberPc and Tc

HPp , Tp

Tp < Tc Pp = Pc + pgh