02 Foinaven Well Case Study

Re-writingtheWestofShetlandRecordBookThroughdeploymentofnewinnovativetechnologies

ICoTA RoundTable– Nov18th-19th 2009

JasperNaylor- BP/AndySkinner- RedSpider

2

SettingtheScene

Foinaven Field, West Of Shetland

� BPOperated(72%BP/28%

Marathon)

� Subsea– 400m- 530m

� Harshenvironmentinremotelocation

� TransoceanRatherSemiSubmersible

� Increasingcostchallenge

� StrongfocusonTechLimitprocess

3

WellP16– sidetrackcandidate

� On-line1996

� Increasingwatercut

P16z Sidetrack

� CompletedawayfromadvancingW16waterfront

� 550mUp-Dipofexistingwellbore

� Existinguppercompletiontubingcutabovepackerandpulled

� Whipstock setin95/8” casingandwindowmilled

� 8½” SidetracktoTD

Re-completion

� NewLower&Uppercompletioninstalled

4

Typical De-completionSteps

• PullTreeCap

• DeployEDP/LRP&DBR

• Bullheadtubingcontentswithseawaterandpill

• RUslick-lineandPCE

• Makedriftrunwithslick-linetobelowplugsettingdepth

• RIHdeepsetplugonslick-lineandsetbelowcompletionpacker

• Testplugto4000psi.

• RIHwithtubingpunchonslicklineandpunchtubingbelowgauge mandrel

• Displacewelltoinhibitedbrinebystraightcirculationandpassreturnsthroughventdown

packageandfiltrationunit.

• RIHJRCtubingcutterandcuttubingabovepunchdepth.

• RIH4.875” QXplugonslick-lineandsetintubinghanger.Testplugto5000psi.

• RUslick-lineonannulusandinstall1.937” QXplug.Testplugto5000psi.

• RDslick-lineandPCE

• RecoverDBR,EDP/LRPandXmasTree

• Runproductionflow-lineandannuluspressurecaps.

• RunBOPandMarineRiser

• TestBOPconnectionto5000psi

• RunTHROT/THOJonDBRandsurfacetreeandlatchontotubinghanger

• RUslickline&PCEonproductionboreandretrieve4.875” QXplug.

• RUslicklineonannulusboreandretrieve1.937” QXplug.

• Closeupperannularandunseattubinghanger

• Circulateoutgaspocketbelowhangerwithreturnspassedthroughchokemanifold

• LDSurfaceTree,OpenannularandPOOHDBR,THROT/THOJwithtubinghangerand

completiontubing.

5

Optimized De-completionStepsw/hRED

• Skid Rig from W17 to P16

• Well Handover

• Pull Tree Cap

• Deploy EDP/LRP & DBR

• Bullhead tubing contents with sea water and pill

• RU slick-line and PCE

• Make drift run with slick-line to below plug setting depth

• RIH Omega plug on slick-line and set below completion packer

• Test plug to 3600psi.

• RIH Schlumberger Power Cutter on slick-line to +/- 2260m and cut tubing.

• Displace well to inhibited brine by straight circulation and pass returns through vent down

package and filtration unit.

• RIH 4.875” QX plug with Hydraulic RED valve on slick-line and set in tubing hanger. Test

plug to 5000psi.

• RU slick-line on annulus and install 1.937” QX plug. Test plug to 5000psi.

• RD slick-line and PCE

• Recover DBR, EDP/LRP and Xmas Tree

• Run production flow-line and annulus pressure caps.

• Run BOP and Marine Riser

• Test BOP connection to 5000psi

• Run THERT on drill pipe and latch on to tubing hanger

• Pressure string to Hydraulic RED opening window for 10 minutes to open valve

• Close upper annular and unseat tubing hanger

• Circulate out gas pocket below hanger with returns passed through choke manifold

• Open annular and POOH THERT with tubing hanger and completion tubing on drill pipe.

HydraulicREDBenefits

1. 24hrs rig time saved vsrunningDBR

2. ContributedtofastestFoinavenDe-completion(15days)

3. ReducedHSEexposure

4. Reducedexposuretoweather

7

P16zCompletion– eRED

Pre-Installed

eREDand

AnnulusFilter

SubinTubing

Hanger

Before&After

ROVClean-UP

� eREDinstalledintubinghangeronshore

(Openposition)

� Uppercompletionrun,packerset/tested

>closeeRED.

� PullBOPs,runtree>openeRED

� Note:Addedopenfrombelowoption

� Confirmnopressurebelow,pulleREDand

annulusfiltersub‘OpenHole’ (noPCE)

ElectronicREDBenefits

1. Slicklinerunscutfrom8to2!

2. 12hrs rig time saved

3. ReducedPOBrequirements,HSE&weatherexposure

4. ContributedtofastestFoinavencompletion(14days)

9

InSummary

� FirstsubseacompletionutilisingbothhRED andeREDtechnology

� Selectedthanksto‘TechLimit’ initiativewithinBPD&Cteam

�Elimination / simplification of critical path activities

� hRED andeREDhelpedsetnewbenchmarkforFoinavencompletion

activity

� A‘measuredrisk’ ratherthanagamble

� i.e. potential loss = 6hrs / potential gain = 24hrs

� ExactsameeREDoptimizationemployedonthePBLJrig30dayslater

andresultedinsametimesavings

� TheREDfamilyofproductsallowedustofindanewwayofworking,

withincreasedefficiencyandreducedriskexposure.

AnyQuestions?

ThanksForListening!