8_Production logging in highly deviated and horizontal wells_Cassone_21_Ottobre.pdf

7/28/2019 8_Production logging in highly deviated and horizontal wells_Cassone_21_Ottobre.pdf

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Production Logging in

Highly Deviated and Horizontal Wells

- Eni Experience -

Author Roberto Cassone

San Donato Milanese 20-21 October 2010

Master in Petroleum Engineering 2009-2010



2



Eni experience


Author

Roberto Cassone

Division Exploration & Production

Dept. IPET/RESM

Company Tutors

Giuseppe Angelo Galli

Andrea Guglielmelli

University Tutor

Francesca Verga




3

Internship workflow

Fluids behaviour in deviated wells

PLT State of Art

Eni experience – analysis

List of contents



Eni experience



4

List of contents



Eni experience

INTERNSHIP WORKFLOW


PLT State of Art

Eni experience – analysis



5

Internship workflow

Market research of available tools for

PLT in highly deviated and horizontal wells

Know how, specifications, applications and limitations

Production Logging in Highly Deviated and

Horizontal Wells - Eni experience

How fluids behave in deviated and horizontal

wells influencing PLT tools

Eni Experience: -PLT analysis & interpretation

-Data integration



6

Internship workflow

FLUIDS BEHAVIOUR IN DEVIATEDWELLS

PLT State of Art

Eni experience

List of contents



Eni experience



7


88°45° 92°90°

Water fall back Vwater = VhydrocarbonsVwater < Vhydrocarbons Vwater > Vhydrocarbons

Yw = > 80% Yw = 20%Yw = 50%Yw = 80%

Heavy phase

recirculationLight phase

Heavy phase

CONSTANT FLOW RATE



8

List of contents



Eni experience

Internship workflow


PLT State of Art

Eni experience



9

Who & How to make PLT

Eni’s contractors – PLT in highly deviated wells

Latest technology available

FSI, RST

POLARIS®

Modified PNN, AFL

CAT, RAT, SAT



10

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

SCHLUMBERGER



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Who & How to make PLT: BAKER HUGHES

Positive

Orientation

Section

RPMReservoir

Performance

Monitor

MCFMMulti

Capacitance

Flow

Meter

POS

PositiveOrientation

System

28 sensors

Velocity

Holdup

WFL

Water

Flow

Log

PNHI

Pulsed

Neutron

Holdup

Imager



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CAT - Capacitance Array Tool SAT - Spinner Array Tool

Who & How make PLT: SONDEX (UK)

Capacitance is a measure of

the amount of electrical

energy stored for a given

electric potential.

Oil Water & Gas have different

dielectric response.

6 mini – spinners mounted on

6 collapsable arms

Phases velocity

RAT - Resistivity Array Tool

12 sensors measure fluids conductivity

Water fraction in the mixture

Water Hold UpRAT

SAT

CAT



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AFL - Activation Flow Log

Who & How make PLT: HOTWELL (AT)

INNOVATION TOOLS:

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

2 0 0 m m

4 0 0 m m

8 0 0 m m

1 6 0 0 m m

Neutron Generator



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List of contents

Production Logging in Highly Deviated and Horizontal

Wells –

Eni experience

Internship workflow


PLT State of Art?

Eni experience



16

Dec 2008

Qoil

676m3 /d

Qgas: 97900 Sm3 /d

Qwater: 33 m3 /d

WC: 4.6 %

Horizontal section completed with 41/2 in. liner

and perforated @:

FSI

3790m MD 3880m MD

3930m MD 3885m MD 3980m MD

3938m MD

4035m MD

3944m MD

- 6 runs (3 up & 3 down)

- 7 stations

eni experience – WELL “A” FSI Acquisition



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Well “A” raw data in flowing conditions

WELL PRESSURE WELL TEMPERATURE

0.93 g/ccWATER & OIL

MIXTURE

WELL FLUID DENSITY




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DEFT

NO GAS

SPINNER ROTATION

Spinners•FSI raw data from: GHOST

DEFT

FLOWING CONDITIONS

Well “A” raw data in flowing conditions:


GHOST

3860 m MD



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Well “A” – GHOST & DEFT

Residual gas (N) from

Clean Up

Yw ~ 30% & Vw < Vo

Yw decrease due to lower deviation

Yw ~ 30% & Vw ≈ Vo

Water accumulates at the bottom

of the wellbore 4000 m MD



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Feb 2010

Qoil 360 m3/d

Qgas: 23000 Sm3/d

Qwater : 270 m3/d

WC: 43%

Survey

Slant profile

Max deviation: 85° @ 3134 m MDPaySlotted liner: 3832 - 5017 m MD

OH: 5017 - 5368 m MD

OPEN HOLE

5017-5369

(TVD 3150 m)

2005

eni experience – WELL “B”

BLANK

4486-4815(84°)

BLANK

3832-3935

(85°)

SLOTTED3935-4486

SLOTTED4815-4968

BLANK

4968-5017

(84°)



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MARCH 2010

1st Acquisition failed (asphaltene)

eni experience – WELL “B” FSI Acquisition



tractors PNN modified RAT Temp & Press

gaugeGEOLOGICAL SECTION

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JULY 2010

- Copgo, through SONDEX & HOTWELL, provides tools for the new acquisition

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

eni experience – WELL “B” Sondex & Hotwell Acquisition



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Well “B” JULY 2010

UpDown




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Well “B” JULY 2010

Modified PNN provides: water velocity & hydrocarbons velocity

Hydrocarbons velocity not available

Under tool resolution




25Pressure from runUP

Pseudo DensityWater Holdup

Pseudo density

corrected for

well deviation

From Well “D” PVT

ρo = 0.6744 g/ccρw = 1.028 g/cc



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Depth

m MD

Flow rate

m3/d

Water Holdup

from Press

Water Flow

rate m3/d

Flow rate

m3/d%

3848 299.80 0.90 270

4048 299.23

SLOTTED LINER 73 30%

4148 266.06

4248 231.90

4348 210.96

4698 218.84 0.90 197

4848 226.03

SLOTTED LINER 197 70% 4898 207.06

4948 138.60

4988 0 0.90 0




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Water 30%

Water 70%

OIL



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Sep. Test Sept. 2010

(choke 5/8”)

FTHP = 72 bar

Qoil = 480 m3/d

Qwater=0 m3 /d

WC = 0 %

Sep. Test Feb. 2010

(choke 5/8”)

FTHP = 66 bar

Qoil = 360 m3/d

Qwater= 270 m3 /d

WC = 43 %

eni experience – WELL “B” remedies effects

BLANK 3832-3935 (85°)

SLOTTED 3935-4486

BLANK 4486-4815(84°)

SLOTTED 4815-4968

BLANK 4968-5017 (84°)

OPEN HOLE 5017-5369

(TVD 3150 m)

4500 mMD

Sep. Test Oct. 2010

(choke 5/8”)

FTHP = 72 bar

Qoil = 390 m3/d

Qwater=134 m3 /d

WC = 25 %



Data integration for the best interpretation

PLT data +

Drilling data +

Completion data +

Reservoir data =

Reliable interpretation

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CONCLUSIONS

Study, develop & choose

the best tools/string for the best acquisition

Fluids behaviour in deviated wells suggests to:



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Acknowledgements

I would thank Eni E&P Division Management for permission to present this workand related results and RESM colleagues (in particular Giuseppe Galli, Andrea

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




Author

Dr. Roberto Cassone

Division Exploration & Production

Dept. IPET/RESM

Company Tutors

Dr. Giuseppe Angelo Galli

Dr. Andrea Guglielmelli

University Tutor

Prof. Francesca Verga

31



Eni experience



Documents

8_Production logging in highly deviated and horizontal wells_Cassone_21_Ottobre.pdf