slap 47 wireline efficiency unconventional plays · wireline specific pumpdown in horizontal wells....

SLAP 47SLAP 47

Lina Pradilla

Wireline Efficiency in Unconventional Plays – The Argentinean Experience

Agenda

■ Background

■ Challenges

■ Solutions

■ Results

■ Way Forward

SLAP 47 SLAP 47 –– Lina PradillaLina Pradilla 2

■ Way Forward

■ Conclusions

BackgroundBackground

Argentina has great potential for unconventional resources

■■ VacaVaca MuertaMuerta: : Jurassic Sedimentary formation with high organic carbon content, present in the Neuquen Basin. The shale thickness reaches 450 m in center of the basin.


Operational Conditions

Traditional Traditional –– conventionalconventionalBEFORE BEFORE

� Low Well Head Pressure � Multiple runs� Low volume / Low cost

Vs Unconventional Unconventional –– Shale Shale AFTER AFTER

� WHP: 5,000 – 8,000 psi

� Single run for Plug + multiple guns

� High Volume

High Efficiency Required


� Low volume / Low cost� Short jobs. (1-2 days)� All equip. prepared from the base� Only WL truck + crane� Clean fluid (no sand)� Low risk� Vertical wells

� High Efficiency Required

� Multidisciplinary jobs Idle equipment = $$$ eliminate failures

>50 people on location = HSE Challenge

� 365 days/year, 24/7

� Maintenance required at the wellsite

� Horizontal wells: tractor / pumpdown

Challenges Challenges –– Adapting to ChangeAdapting to Change

■ People: Develop Local Expertise. Operational evolution for Shale development

■ Suitable equipment for new operating conditions

■ Suitable technique for conditions


■ Suitable technique for conditions

Transition from getting the job Transition from getting the job

done to becoming efficientdone to becoming efficient

SolutionsSolutions – Developing Local ExpertiseLocal Expertise

Challenges Encountered– High complexity of perforating operations– Local personnel with no experience in shale operations– Small Cased Hole structure

Solutions:


Solutions:– Engineers traveled to USA to be exposed to shale operations to develop competency

– Experienced engineers from USA invited to Neuquen to share their knowledge

– Local ideas/knowledge merged with international experience– Allocated resources to grow CH structure

SolutionsSolutions – Acquiring Suitable EquipmentSuitable Equipment

Challenges Encountered

– Required equipment not available in country

– Import / Export limitations in Argentina

– Participation in horizontal wells completion


Solutions:

– Import critical pieces that could avoid “reinventing the wheel”

– Develop local manufacturers, with international proven reliable technology

– Adapt local hardware to requirements

Suitable Equipment

■ 5 1/8” 10K Pressure Equipment

■ Plug & shoot hardware

■ Electrical Switches

■ Change detonators (smaller, easy to arm / faster)

■ Large OD, heavy Weight Bars.

■ Maintenance trailer on location

PEK-B (Head)

CAL-B

(CCL)

Gun #4

Gun #3

Gun #5

(Backup)

MH-22 Head

Firing Head


■ Maintenance trailer on location

HORIZONTAL WELLS■ Tractor Conveyed perforating■ Pumpdown services

Gun #2

CPST-AA

Shooting plug

Adapter

Plug + Adapter

kit

Gun #1

EQF-33

SolutionsSolutions – Developing Suitable TechniqueSuitable Technique

Walk the learning curve along with the client

Procedures, lessons learned & risk analysis

■ Wireline specific

Pumpdown in horizontal wells. (skill / communication)

Rig up rig down, preparation for each stage


Rig up rig down, preparation for each stage

■ Inter-discipline

• CT best practices to prevent migration of gas - hydrates formation

• Frac flushing techniques to avoid sand during the WL run

■ Efficiency has to increase in order to reduce cost of shale completions and increase profitability

― Independent Runs vs Plug and Perf

―Mechanical Vs electronic selectivity system• Allows pre-arming gun string / Allows surface check before RIH / Allows

Transition from Getting the Job done to becoming Efficient


• Allows pre-arming gun string / Allows surface check before RIH / Allows confirmation

― Streaming the process / continuous improvement

― Importance of Integrated Services to reduce NPTs. • Built common sense of responsibility

• Coordination/ Teamwork

• Standardized procedures

Tips & tricks to boost efficiency

■ Rig Up procedure

■ BOP rigged up in between stages

■ Man Lift

■ Quick Test Sub

■ Pressure Testing with Live Guns


■ Inter-disciplinary communication – Simultaneaos opperations

■ Color codes for radio silence (RED / GREEN FLAGS)

■ Standarized procedures - Becoming consistent

■ Dedicated crews

■ Multipads

■ Logistics

300

350

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450

500

25

30

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Stages/Month Cumulative

Results

Getting the job done

Becoming efficient


0

50

100

150

200

250

0

5

10

15

20

Cu

mu

lati

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Adapting to change

Way Forward

■ Polymer coated cables

■ Oriented perforating for horizontal comp.

■ Disposable gun systems

• Modular (up to 5ft)• Preferred plane frac initiation

• Torque/ Bird caging/ Stranded armors • Gas Migration through inner and • Zero Torque / Bonded Armor wires• Sealed polymer cable


• Modular (up to 5ft)• Light• Adaptor-less (no cleaning)• Zero crimping at the wellsite• Cost – effective• RF versions available

• Preferred plane frac initiation• Gas Migration through inner and

outer armors• Complex well head control for High P.• Grease Injection & mess • Limited running speeds • friction in deep horizontal wells • Rig up height requirement

• Large WHE and grease tubes

• Sealed polymer cable• Compact “Eziload” packoff• No grease, No mess• Limited only by safe winch policy• Friction reduced 40%• Enables longer gun strings / smaller

cranes• No cable stuck in presence of sand /

particles

Conclusions

■ Key recommendations for a successful WL unconventional project startup:

Design

Prepare

� Good project design/preparation between client/ wireline / other disciplines. Define expectations before hand.

� Plan equipment availability according to operational challenges

� Train entire crews “hands on” before execution


Prepare

Execute

Improve

� Prepare contingency plans before hand and discuss with client.

� Merge international expertise with local experience – create local procedures / lessons learned for specific conditions.

� Execute aiming for continuous improvement– Have a designated project leader

� Train entire crews “hands on” before execution

QUESTIONS & ANSWERS


slap 47 wireline efficiency unconventional plays · wireline specific pumpdown in horizontal wells....

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