8_Production logging in highly deviated and horizontal wells_Cassone_21_Ottobre.pdf

Master in Petroleum Engineering 2009-2010

Production Logging in Highly Deviated and Horizontal Wells - Eni Experience www.eni.it

 Author  Roberto

Cassone

Master in Petroleum Engineering Engineering 2009-2010

Production Logging in Highly Deviated and Horizontal Wells Eni experience  Author  Author

Company Tutors Giuseppe Angelo Galli 

Roberto Cassone 

 Andrea Guglielmelli  Guglielmelli  Division

Exploration & Production 

University Tutor

Dept.

IPET/RESM 

Francesca Verga 

San Donato Milanese

20-21 October 2010

2

Master in Petroleum Engineering Engineering 2009-2010

Production Logging in Highly Deviated and Horizontal Wells Eni experience  Author  Author

Company Tutors Giuseppe Angelo Galli 

Roberto Cassone 

 Andrea Guglielmelli  Guglielmelli  Division

Exploration & Production 

University Tutor

Dept.

IPET/RESM 

Francesca Verga 

San Donato Milanese

20-21 October 2010

2

List of contents Production Logging in Highly Deviated and Horizontal Wells Eni experience

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Internship Internshi p workflow

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Fluids behaviour in deviated wells

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PLT State of Art

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Eni experience – analysis

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List of contents Production Logging in Highly Deviated and Horizontal Wells Eni experience

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INTERNSHIP WORKFLOW

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Fluids behaviour in deviated wells

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PLT State of Art

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Eni experience – analysis

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Internship workflow

Production Logging in Highly Deviated and Horizontal Wells - Eni experience

How fluids behave in deviated and horizontal wells influencing PLT tools

Market research of available tools for PLT in highly deviated and horizontal wells

Know how, specifications, applications and limitations

Eni Experience:

-PLT analysis & interpretation -Data integration

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List of contents Production Logging in Highly Deviated and Horizontal Wells Eni experience 

Internship workflow

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FLUIDS BEHAVIOUR IN DEVIATED WELLS

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PLT State of Art

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Eni experience

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Fluids behaviour in deviated wells Heavy phase recirculation

45°

Water fall back

Yw = > 80%

CONSTANT FLOW RATE

Light phase

Heavy phase

88°

90°

92°

Vwater  < Vhydrocarbons

Vwater  = Vhydrocarbons

Vwater  > Vhydrocarbons

Yw = 80%

Yw = 50%

Yw = 20%

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List of contents Production Logging in Highly Deviated and Horizontal Wells Eni experience 

Internship workflow

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Fluids behaviour in deviated wells

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PLT State of Art

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Eni experience

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Who & How to make PLT Eni’s contractors – PLT in highly deviated wells Latest technology available

FSI, RST POLARIS® CAT, RAT, SAT Modified

PNN, AFL 9

Who & How to make PLT: FloScan Imager - FSI

Include: - Flowmeter: 5 – mini spinners provides fluids velocity along vertical section

- Hold up from: 6 electric  probes DEFT (for Yw) 6 optical  probes GHOST

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Who & How to make PLT: WFL Water  Flow Log

RPM Reservoir  Performance Monitor 

PNHI Pulsed Neutron Holdup Imager 

Velocity Holdup

POS Positive Orientation System Positive Orientation Section

MCFM Multi Capacitance Flow Meter 

28 sensors

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Who & How make PLT: SAT - Spinner Array Tool

CAT - Capacitance Array Tool Capacitance is a measure of  the amount of electrical energy stored for a given electric potential.

6 mini – spinners mounted on 6 collapsable arms SAT

Oil Water & Gas have different dielectric response. CAT

Phases velocity

Water fraction in the mixture

RAT - Resistivity Array Tool 12 sensors measure fluids conductivity

RAT

Water Hold Up

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Who & How make PLT: INNOVATION TOOLS:

AFL - Activation Flow Log Operating like WFL application but with 4 GAMMA RAY DETECTORS PRO:

- C, O & H spike detection based on decay time - Discriminate Water from Hydrocarbons Communication Temperature CCL GR detector @ 1600mm GR detectors @: 200mm 400mm 800mm Neutron generator

    m     m      0     m      0     m      6      1     m      0      0     m      8     m      0      0     m      4      0      0      2

Neutron Generator 

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List of contents Production Logging in Highly Deviated and Horizontal Wells  –  Eni experience

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Internship workflow

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Fluids behaviour in deviated wells

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PLT State of Art?

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Eni experience

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eni experience – WELL “A” FSI Acquisition Dec 2008 Qoil 676 m3 /d Qgas: 97900 Sm3 /d m3 /d Qwater: 33 WC:

Horizontal section completed with 4 1/2 in. liner  and perforated @:

4.6 % 3885m MD 3930m MD

3790m MD

FSI

3880m MD

3938m MD

3980m MD

4035m MD

3944m MD

- 6 runs (3 up & 3 down) - 7 stations

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eni experience – WELL “A” FSI Acquisition Well “A” raw data in flowing conditions WELL PRESSURE

WELL TEMPERATURE

WELL FLUID DENSITY

0.93 g/cc WATER & OIL MIXTURE

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eni experience – WELL “A” FSI Acquisition Well “A” raw data in flowing conditions: GHOST

•FSI raw data from:

Spinners GHOST DEFT NO GAS

FLOWING CONDITIONS

SPINNER ROTATION

3860 m MD

DEFT 18

Well “A” – GHOST & DEFT

 Yw decrease due to lower deviation

 Yw ~ 30% & V w ≈ Vo

Water accumulates at the bottom 4000 m MD of the wellbore  Yw ~ 30% & Vw < Vo

Residual gas (N) from Clean Up

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eni experience – WELL “B”  Survey SLOTTED 3935-4486

BLANK 3832-3935 (85°)

SLOTTED 4815-4968

BLANK 4486-4815 (84°)

BLANK 4968-5017 (84°)

Slant  profile

Max deviation: 85° @ 3134 m MD Pay Slotted liner: 3832 - 5017 m MD OH: 5017 - 5368 m MD

OPEN HOLE 5017-5369 (TVD 3150 m)

Feb 2010 Qoil

360

m3/d

Qgas: Qwater :

23000 270

Sm3/d

WC:

m3/d

43%

2005

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eni experience – WELL “B” FSI Acquisition MARCH 2010

1st Acquisition failed (asphaltene)

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eni experience – WELL “B” Sondex & Hotwell Acquisition JULY 2010 - Copgo, through SONDEX & HOTWELL, provides tools for the new acquisition

tractors

PNN modified

RAT

GEOLOGICAL SECTION

Temp & Press gauge

NO SPINNER - Shut in run, failed due to excessive amperage required by tractors to move down the string – operation stopped and string move out - Only flowing test available

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eni experience – WELL “B” Sondex & Hotwell Acquisition Well “B” JULY 2010

Down

Up

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eni experience – WELL “B” Sondex & Hotwell Acquisition Well “B” JULY 2010

Modified PNN provides: water velocity & hydrocarbons velocity

Under tool resolution

Hydrocarbons velocity not available 24

From Well “D” PVT ρo = 0.6744 g/cc ρw = 1.028 g/cc

Pseudo density corrected for  well deviation Pressure from run

Pseudo Density

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eni experience – WELL “B” Sondex & Hotwell Acquisition

Depth

Flow rate

Water Holdup

Water Flow

Flow rate

m MD

m3/d

from Press

rate m 3/d

m3/d

3848

299.80

0.90

270

4048

299.23

4148

266.06

4248

231.90

4348

210.96

4698

218.84

4848

226.03

4898

207.06

4948

138.60

4988

0

SLOTTED LINER

0.90

73

30%

197

70%

197

SLOTTED LINER

0.90

%

0

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eni experience – WELL “B” Sondex & Hotwell Acquisition

Water 30%

OIL

Water 70%

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eni experience – WELL “B” remedies effects SLOTTED 3935-4486

SLOTTED 4815-4968

4500 mMD

BLANK 4968-5017 (84°)

BLANK 3832-3935 (85°) BLANK 4486-4815(84°) OPEN HOLE 5017-5369 (TVD 3150 m)

Sep. Test Feb. 2010

Sep. Test Sept. 2010

Sep. Test Oct. 2010

(choke 5/8”)

(choke 5/8”)

(choke 5/8”)

FTHP = 66 bar

FTHP = 72 bar

FTHP = 72 bar

Qoil = 360 m3/d

Qoil = 480 m3/d

Qoil = 390 m3/d

Qwater= 270 m 3 /d

Qwater=0 m3 /d

Qwater=134 m3 /d

WC = 43 %

WC = 0 %

WC = 25 % 28

CONCLUSIONS Fluids behaviour in deviated wells suggests to:

Study, develop & choose the best tools/string for the best acquisition

Data integration for the best interpretation PLT data + Drilling data + Completion data + Reservoir data = Reliable interpretation

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Acknowledgements

I would thank Eni E&P Division Management for permission to present this work and related results and

RESM

colleagues (in particular Giuseppe Galli, Andrea

Guglielmelli & Carmela Vecera) for the technical support and needed assistance.

San Donato Milanese

20-21 October 2010

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