131120 presentation slides flow assurance

8/13/2019 131120 Presentation Slides Flow Assurance

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Flow Assurance - Managing FlowDynamics and Production Chemistry

Abul Jamaluddin, Ph.D.Production Technology AdvisorBusiness Manager North AmericaNExT Oil & Gas Training and Career Development

What is the primary operating focusof your team?

Acknowledgement

SPE for organizing this Webinar All clients who contributed to some of the field examples Schlumberger to allow me to participate and thanks to the

following sub segments for providing the contents -

Schlumberger Research Reservoir Sampling and Analysis sub segment Flow Assurance Consulting group of OneSubsea NExT Oil and Gas Training and Competency Development

of Petrotechnical Services


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Presentation Outline

Deepwater & flow assurance

Flow hindrance elements

A holistic flow assurance workflow

Field examples with key technology applications Waxy crude production management (SPE 132615)

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Deepwater Flow Assurance Challenges

Colder temperatures Greater hydrostatic head Longer tiebacks, and hence complex thermo-hydraulic fluid

behaviour Gas condensate production Organic/Inorganic solids precipitations

Commingled production complex fluid systems

Reservoir Complexity - shallow reservoir, HPHT,compartmentalised,

Reduce uncertainties and minimize risks CAPEX versusOPEX

Commingling ofIncompatible fluids

Cold deep waterfacilitates deposition

Large pressure drops

facilitates deposition

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Liquid-

Management Asphaltenes Hydrates Wax Scale PVT & Fluid-

eha!i"ur

#"rr"si"n

&$r"si"n

%pera ilityAssessment

'ntegratedS"luti"ns

Sur!eillance

&%perati"n

Flow Assurance

Maintain flowfrompore toprocess


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Flow Hindrance Elements Especially Critical in Offshore Arena

Fluid Properties - PVT

Fluid Flow & HeatTransfer

Asphaltene

Wax

Hydrate

Naphthanates - SoapsOilfield Scales

Emulsions/ Foams

Corrosions/Erosions/Sand

Heavy Oils

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Understanding the fundamentals of these elements are theke to design management strateg

Flow Assurance Domains

Production Chemistry

!hara"teri#ation$ %redi"tion offlo& sto%%age elements

Production Engineering

'hermal(h drauli" design andassessment of su)sea

multi%hase flo& s stems

Production Surveillance

*rodu"tion o%timi#ation andearl dete"tion of flo& sto%%ages

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What is your primary area ofexpertise/interest?


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Holistic Flow Assurance Workflow

DownholeCharacteriza

tion &Single-Phase

Sampling

LaboratoryMeasureme

nts

PVT Asphalten

e Wax Hydrate

Modeling

Thermodynamic

Steady &TransientStateModeling

Integration,Interpretatio

n andDesign

FieldImplementat

ion

Implementatechnicallysound,costeffectiveandenvironmental soundsolution

,eed)a"k -oo%10AJ11/19/2013

Subsea Natural Lift

Subsea Gas Lift

Liquid Management

!ourtes of .ne u)sea

*ressure -i uid anagement

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Production ChemistryFluid sampling, analysis, characterisation, prediction ofchallenges

V a

l u e o

f D a

t a

S a m p

l i n g

F l u i d M o

d e l

i n g

M o

d e l c a

l i b r a

t i o n

I n t e r p r e

t a t i o n

F l u i d S a m p

l i n g

S a m p

l e s

A n a

l y s i s

Time

Scale PrecipitationResults

0.00E+00

1.00E-04

2.00E-04

3.00E-04

4.00E-04

5.00E-04

6.00E-04

0 0. 2 0 .4 0 .6 0 .8 1

Mass Fractionof FormationWater

S o

l i d M a s s

F r a c

t i o n

BaSO4 Cal.SrSO4 Cal.BaSO4 Exp.SrSO4 Exp.

0

2

4

6

8

10

12

14

16

18

20

0 3 00 0 6 00 0 9 00 0 1 20 00 1 50 00 1 80 00Distance(m)

D e p o s

i t t h i c k n e s s

( m m

)

0

5

10

15

20

25

30

35

40

45

T e m p e r a

t u r e

( C )

1 month6 months1 year

Temperatureprofiles

Development of Asphaltene Deposition Model

*erformas%haltene "hara"teri#ation

!al"ulate as%haltene(li1uid3/-4 flash

5m%lement the%arti"le de%osition me"hanism &hi"h in"ludes %arti"le formation$trans%ortation and adsor%tion

/ingle and t&o %hase flo&models

(1) ParticlesForm (2) Particle

Transport(3)Particles

Adsorb

(1) ParticlesForm (2) Particle

Transport(3)Particles

Adsorb

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Production EngineeringImportance of Dynamics from Reservoir to Process Facilities

Slug Catcher

ECL PSE

6eser oir

Process !acilities

tead tate .ut"omes

*eak %rodu"tion rates!om%letions design*i%eline si#ing8 ui%ment si#ing

nami" .ut"omes*rodu"tion %rofiles:ell "lean(u% / start(u% %ro"edures!ooldo&n / insulation re uirements-i uid surge management / slug "at"her

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ECL PSE

6eser oir

Process !acilities

Production OperationsProduction surveillance and optimization, operational well and pipeline remediation,prevention and mitigation techniques in order to optimize production

onitor ensors and * metersata a" uisitionata alidation and storage

Alarm.%timise

ntegrated asset management:ell inter ention,lo&line remediation

Distributed temperaturesensors DTS

Multiphasemeter

Production Intervention

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Asphaltenes in the Reservoir

Reservoir Architecture Aerial Compositional GradingCompartments, sealing barriers, bafflesDifferent Fault BlocksDifferent GOR (colors)

HiberniaAreal Map15AJ

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Impact Completions

O n e

O i l

C o

l u m n

!ourtes of .! ullins

Vertical Compositional Grading (Heavy Ends ! )Reservoir Fluids are often highly graded and oftenNOT in equilibrium

May have compatibility issues

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Wax

Asphaltene

GasHydrate

Production Chemistry

AthabascaBitumen >1

DiamondoidsDiamondoidsDiamondoidsDiamondoids

Organic ScaleOrganic ScaleOrganic ScaleOrganic Scale

Mercury

Asphaltenes

Causes of Asphaltene PrecipitationChange in Oil Composition

Pressure Depletion Above P sat

Change in Temperature

Others (pH, Water Cut, Electro-kinetic Effects etc)

N

S

H

AsphaltenesOperationally defined as a portion of crude oil insoluble in n-alkanes such as heptane but soluble in aromatics such astoluene or dichloromethane. Source specific.They are the heaviest and the most polar components incrude oil composed of : Polyaromatics carrying aliphatic rings or chains H/C atomic ratio = 1.0-1.2 Heteroatoms: nitrogen, oxygen, sulfur Metals: nickel, vanadium, iron.


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What is your major flowassurance concern?

Field Example: Waxy Crude Management inDeepwater from South East Asia

Field SituationDual 5-km deepwater subsea line capability with pigging operationsHalf buried no insulationHigh pour point waxy crude production at subsea temperature of 4CNo wax deposition in early life

ChallengeConcerned with wax gelling during unplanned shut down.

Recommendation by Chemical VendorContinuous chemical (PAO82004) injection at 300 ppm

Operating Company PerspectiveIndependent verification of gelling characteristics & chemicalrequirements

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SPE "#$%"&

Waxy Crude Flowline Unplanned Shutdown/Re-Start Evaluation Workflow

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' h e r m o

d n a m

i " 2 o

d e

l i n g

Phase Behavior Standard PVT analysis (Define phase boundaries)

WaxCharacterization

Thermodynamic Characteristics Compositions C90+ Wax Content Cloud Point/WAT @ Ambient/Line

Condition

Transport Characteristics

131120 presentation slides flow assurance

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