jude cooper iema dwh pres_ppt

8/3/2019 Jude Cooper IEMA DWH Pres_ppt

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Prepared byGenesis Oil & Gas Consultants Ltd.,

6, Albyn Place, Aberdeen, AB10 1YH

tel. 01224 615100 fax. 01224 615111

www.genesisoilandgas.com

Prepared for

Institute of Environmental Management

& Assessment

Deepwater Horizon a high-levelsummary of the BP internal

investigation report findings
http://www.genesisoilandgas.com/http://www.genesisoilandgas.com/


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Prepared by Genesis Oil and Gas Consultants

Contents

2

OffshoreOffshore installationsinstallationsWellWell profile,profile, drilldrill stringstring andand circulationcirculation systemsystem

CasingCasing andand cementingcementing

WellWell controlcontrol

BlowBlow outout preventerpreventer

SummarySummary ofof BPsBPs internalinternal reportreport intointo thethe blowoutblowout onon

DeepwaterDeepwater HorizonHorizon


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Offshore installations

3

source unknown


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Well profile

4

7 Liner hanger

7 Liner shoe

source unknown


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Drill string and drill bit

5

TheThe drilldrill stringstring comprisescomprises 3030 jointsjoints ofof hollowhollow pipe,pipe,screwedscrewed togethertogether toto makemake aa longlong drilldrill stringstring

Drilling fluid (mud) is pumped down the drill string to the drill bit

source unknown


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Circulation system

6

source unknown


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Casing

Casing is the steel pipe that is run into the drilled holeCasing is the steel pipe that is run into the drilled holeand cemented into place. The purpose of casing is:and cemented into place. The purpose of casing is:

To seal off permeable formations and prevent fluids enteringthe wellbore

Provide physical support to the wellbore Prevent reactions between formation and wellbore fluids.


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Cementing casing

Cement jobCement job

After running the casing string, chemical spacers are pumped to improvethe cement bond

The bottom rubber plug is pushed into the casing, behind it cement ispumped

Once all of the cement is pumped the solid top plug is dropped anddisplaced with a displacement fluid (usually mud)

The bottom plug has a rupture disk in the middle which bursts open when aset amount of pressure is applied from above

Once the two plugs have bumped the cementers know the cement job iscomplete.


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Cement job

source unknown


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Well control

10

BalancingBalancing thethe pressurepressure exertedexerted byby thethe formationformation onon thethewellwell borebore

Correct mud weight Physical barriers Casing Cement

Monitoring Pit levels Pressure

Blow-Out Preventers

adapted fromhttp://images.pennwellnet.com/ogj/images/ogj2/9644jsh03.gif
http://images.pennwellnet.com/ogj/images/ogj2/9644jsh03.gifhttp://images.pennwellnet.com/ogj/images/ogj2/9644jsh03.gif


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Subsea BOP

11

Blind Shear Ram

BOPStack

fromhttp://www.nytimes.com/interactive/2010/06/21/us/20100621-bop.html?scp=1&sq=BOP%20animation&st=cse
http://www.nytimes.com/interactive/2010/06/21/us/20100621-bop.html?scp=1&sq=BOP%20animation&st=csehttp://www.nytimes.com/interactive/2010/06/21/us/20100621-bop.html?scp=1&sq=BOP%20animation&st=cse


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Deepwater Horizonincident

12

TheThe followingfollowing informationinformation (including(including graphics)graphics) isis takentaken

fromfrom BPsBPs internalinternal investigationinvestigation report,report, publishedpublished 0808

SeptemberSeptember 20102010..

TheThe reportreport isis availableavailable onon BPsBPs websitewebsite ((wwwwww..bpbp..comcom))


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StatusStatus ofof wellwell priorprior toto blowoutblowout

The well had been drilled to total depth The well was cased and fully cemented Integrity tests had been carried out on

the casing and cement

Temporary abandonment of the wellwas almost complete

Deepwater Horizon was connected tothe well via the marine riser and BOP


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14

AA complexcomplex andand interlinkedinterlinked seriesseries ofof mechanicalmechanical failures,failures,

humanhuman judgements, judgements, engineeringengineering design,design, operationaloperational

implementationimplementation andand teamteam interactionsinteractions camecame togethertogether toto allowallow

thethe initiationinitiation andand escalationescalation ofof thethe DeepwaterDeepwater HorizonHorizon

accidentaccident.. MultipleMultiple companies,companies, workwork teamsteams andand circumstancescircumstances

werewere involvedinvolved overover timetime..


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15

KeyKey findingsfindings ofof thethe BPBP internalinternal reportreport


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Well integrity

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KeyKey findingfinding ##11

The annulus cementbarrier did not isolate

the hydrocarbons

KeyKey findingfinding ##22 The shoe trackbarriers did not isolate

the hydrocarbons


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Hydrocarbons enter the well undetected

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The negative pressure test was accepted although well integrityhad not been established


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Hydrocarbons enter the well undetected

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The influx was not recognised until hydrocarbons were in the riser Simultaneous activities may have impeded monitoringMud transfer to supply boat Cleaning trip tank


Well control response actions failed to regain control of the well


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Hydrocarbons spread and ignite

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KeyKey findingfinding ##66 && ##77

Diversion to the mud gas separator resulted in gas venting onto the rig The fire and

gas system

did not

prevent

hydrocarbon

ignition


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BOP did not seal the well

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The BOP emergency mode didnot seal the well

Emergency disconnectsequence was not

successful

Multiplex (MUX) cablespossibly damaged during

initial explosion

Blue pod insufficientcharge on the batteries Yellow pod failed solenoidvalve


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Prepared by Genesis Oil and Gas Consultants21

The investigation teams recommendations fall into eightThe investigation teams recommendations fall into eightcategoriescategories

Procedures and Engineering Technical Practices Capability and Competency Audit and Verification Process Safety Performance Management Cementing Services AssuranceWell Control Practices Rig Process Safety BOP Design and Assurance.

BP recommendations

jude cooper iema dwh pres_ppt

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