Multistage onshore completion in Romania. - Petroleum … · • Combofrac Openhole Swellable...

$: Multistage onshore completion in Romania. - Petroleum … · • Combofrac Openhole Swellable Packer ... element system ... standard coiled- tubing or wireline-tractor tooling.$
© 2013 Weatherford. All rights reserved. 1 © 2013 Weatherford. All rights reserved.

Multistage onshore completion in Romania.

Mario Ulloa Europe & Caspian Regional Product Line manager Pressure Pumping

November 2013


Introduction

• Weatherford is one of the largest diversified upstream oilfield service companies in the world.

Our products and services span the lifecycle of a well including: Drilling, evaluation, completion, stimulation, production and intervention.


Workover Objective

• No HSE incidents during the workover

• Recover original well production with new intervals

• Perform Hydraulic Stimulation on 3 stages

• Minimize sand/proppant flow back

• Flow back each interval independently for measurement


Brief Well History

• The well was drilled between 23th July – 20th August 2010 at the depth of 1970 m.

• The last performed jobs: March 2012 – cement plug at 1803m, perforate 1799-1797.5m and 1778-1771m Helvetian.

• Initial production: 9to/d.

• Production before the treatment: 1.96 to oil/d & 1000 Scm/d AG, water cut = 22%


Interval Selection


Well Information

• Casing: 7” 26#/ft @ 1803 m

• Tubing: 3 ½” 12.7 #/ft and 4 ½”

• Stages Interval(s) – Stage 1: 1,771 - 1,799m

– Stage 2: 1,723 - 1,730m

– Stage 3: 1,667.5 - 1,687m

• Formation: – Stage 1 - Lower 4 Helvetian

– Stage 2 - Intermediate 3 Helvetian

– Stage 3 - Intermediate 3 Helvetian

• Porosity and permeability: 20 – 30 %, 56mD

• BH Temperature: 56degC (132.8degF)

• Frac gradient: 0.1526 bar/m (0.674 psi/ft)


Downhole completion


Completion main components

• ZMD Series monobore stimulation sleeve

– Flow area through port is maximized

– Inner sleeve shifts past the flow port of the outer body

• Combofrac Openhole Swellable Packer

– High-pressure Hydraulic stimulations

– Completion of wells underbalanced or on losses

• WFX Blackcat Packer

– High-pressure ECNER Array packing element system

– Rotationally locked for ease in milling

– Retrieval mechanism protected from debris

ZMD Series monobore stim

sleeve

Combofrac Openhole

Swellable Packer

WFX Blackcat Packer


FloReg™ Reservoir Control (RC)

• With planned intervention, the RC can be run closed to prevent sand-screen plugging.

• Units can be selectively opened or closed using standard coiled-tubing or wireline-tractor tooling.

• The FloReg RC prevents annular hot-spotting by evenly distributing the inflow along the production string.

• Modular architecture can be employed to permit simple integration of annular zonal isolation technologies in any configuration.

• FloReg RC flow ports are made from tungsten carbide, mitigating flow-induced erosion.


Zeta Flow: Conductivity Enhancer, Proppant/Fines Control & Load Recovery Agent

10

• Increases proppant pack conductivity and enhances flow capacity

• Controls the migration of damaging fines and proppant for optimal productivity

• Leaves formation in optimal wetted condition

• Enhances load recovery of treatment fluids vs.

*Data provided by Stim-Lab, Inc.


Stimulation design

Proppant and Fluid Material Quantity Units

AquaVis 22G 7.75 m³ DynaFrac HT 22 96.00 m³ CarboLite 16/20 38552.00 kg Treatment Totals calculated from design schedule





Stage #

Stage Type Fluid Type

Clean Volume

(m³)

Prop Conc 1

(g/L)

Stage Prop. (kg)

Slurry Rate 1

(m³/min)

Proppant Type

1 Main pad DynaFrac HT 22 20.0 0 0 3.20 2 Main slurry DynaFrac HT 22 10.0 100 1,000 3.20 CarboLite 16/20 3 Main slurry DynaFrac HT 22 20.0 300 6,000 3.20 CarboLite 16/20 4 Main slurry DynaFrac HT 22 20.0 500 10,000 3.20 CarboLite 16/20 5 Main slurry DynaFrac HT 22 25.0 700 17,500 3.20 CarboLite 16/20 6 Main slurry DynaFrac HT 22 20.0 800 16,000 3.20 CarboLite 16/20 7 Main flush DynaFrac HT 22 7.3 0 0 3.20 CarboLite 16/20


Treatment

Time

Treating Pressure 1 (bar) Blender Electronic Discharge Rate (m³/min)Proppant Conc (g/L)

19:13 19:16 19:19 19:23 19:26 19:29 0.0

80.00

160.0

240.0

320.0

400.0

0.0

2.000

4.000

6.000

8.000

10.00

0.0

400.0

800.0

1200

1600

2000

Time

Treating Pressure 1 (bar) Blender Electronic Discharge Rate (m³/mProppant Conc (g/L)

19:39 19:45 19:51 19:57 20:03 20:09 0.0

80.00

160.0

240.0

320.0

400.0

0.0

2.000

4.000

6.000

8.000

10.00

0.0

400.0

800.0

1200

1600

2000


Treatment (Third Stage)

Time

Treating Pressure 1 (bar) Annulus Pressure (bar)Blender Turbine Discharge Rate (m³/min) Proppant Conc (g/L)Btm Prop Conc (g/L)

17:00 17:09 17:18 17:27 17:36 17:45 0.0

80.00

160.0

240.0

320.0

400.0

0.0

80.00

160.0

240.0

320.0

400.0

0.0

2.000

4.000

6.000

8.000

10.00

0.0

800.0

1600

2400

3200

4000

0.0

800.0

1600

2400

3200

4000


Treatment (First Stage)

Width Profile

1725

1750

1775

1800

1825

1850

Roc... Stre...

Layer Properties

TVD(m)TVD(m)

ShaleShale

Sands...Sands...

ShaleShale

ShaleShale

Sands...Sands...

Sands...Sands...

ShaleShale

ShaleShale

ShaleShale

1725

1750

1775

1800

1825

1850

25 50 75 100 125

Concentration of Proppant in Fracture (kg/m²)

TVD(m)TVD(m)

0 0.72 1.4 2.2 2.9 3.6 4.3 5.0 5.8 6.5 7.2

Proppant Concentration (kg/m²)

1725

1750

1775

1800

1825

1850

0

Width Profile (cm)

TVD(m)TVD(m)

Fracture Length (m)Propped Length (m)Total Fracture Height (m)Total Propped Height (m)Fracture Top Depth (m)Fracture Bottom Depth (m)Average Fracture Width (cm)Average Proppant Concentration (kg/m²)Equivalent number of multiple fractures Dimensionless Conductivity

Interval #1 60.6 60.2 63.5 63.11740.41803.8 0.269 4.19 1.0 0.274

Interval #2 31.0 28.1 28.1 25.51777.91806.0 0.259 4.04 1.0 0.442


Treatment (Second Stage)


Treatment (Third Stage)


Results

• Completion run without incidents

• Stimulation treatments completed as expected

• Only second stage was open for flow back

• Treatment fluids flow back from this stage in 2 days

• No sand/proppant production

• Integrated completion packages available in Romania


Conclusion

• Multistage Completion

• Horizontal wells

• 60/40 split between Plug&Perf and OH completions

• Hydraulic Stimulation

• Integrated services (Completions tools, Stimulation, CT, N2, Wireline, Slickline, etc)

Unconventionals

Available

Vertical but same principle

Cased Hole completion but similar components

Availablem (25,000 HHP)

WFT can deliver

Current case

Multistage onshore completion in Romania. - Petroleum … · • Combofrac Openhole Swellable...

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