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© 2012 Weatherford. All rights reserved. © 2012 Weatherford. All rights reserved.

Mitigating Formation Evaluation Risk: "Logging Wells Which Were Deemed Impossible to Log Before"

Fabricio Cardenas Wireline BD Manager Eastern Europe April 2014


Topics

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Mitigating Associated Risk Associated with Wireline Services

AssureTM Conveyance Options

Case Studies


The Case for Efficient Conveyance

• Efficient Conveyance is actually about mitigating risks in today’s drilling environment.

© 2012 Weatherford. All rights reserved. © 2012 Weatherford. All rights reserved. 4

Mitigating Associated Risks of Formation Evaluation.

6.25 in. (159 mm) borehole

3.98 in. (101 mm)

2.25 in. (57 mm)

Conventional tools in 6.25-in (159 mm)

hole (2.25 in. from tool to wall)

Compact™ tools in 6.25-in (159 mm)

hole (4 in. from tool to wall)

Competitor’s triple combo

(38 ft x 4.50 in.) (11.6 m x 114 mm)

Competitor’s old triple combo

(90 ft x 4.50 in.) (27.4 m x 114 mm)

Compact triple combo

(29 ft x 2.25 in.) (8.8 m x 57.2 mm)

6.25 in. (159 mm) borehole

3.98 in. (101 mm)

2.25 in. (57 mm)


Mitigating Associated Risks of Formation Evaluation.

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De-Risking Formation Evaluation

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Topics

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Case Studies


Assure Conveyance Options

Achieve your formation evaluation objectives,

Regardless of complex wellbore geometry

With or without wireline

including imaging and pressure/sampling


Memory Based Well Logging

Compact Well Shuttle

•Tools are protected inside Garage Drillpipe and deployed at reaching total depth

• Without Wireline Drillpipe can be rotated hence memory logs can be combined with other operations

Compact Drop Off

•Drillpipes are dressed with a No-Go arrangement and lowered to total depth.

• Memory tools are then deployed on Wireline at No-Go and pulled up with Drillpipe


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Assure™ Conveyance Options

• The key to overcome limitations and mitigate risk to guarantee logging is to eliminate Wireline

• Benefits:

– Acquisition of high-value data in wells which were deemed impossible to log before

– Better Well Control during operation. Drillers can rotate and circulat

– Freedom from constraints on well construction

– Reduced risk of no/partial logs and stuck/lost tools


Topics

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Case Studies

© 2012 Weatherford. All rights reserved. © 2012 Weatherford. All rights reserved. 15

Case Studies Eastern Europe

Case Study: Economic and Safe Alternative to LWD in Challenging Field (Ukraine)

Case Study – Compact™ Drop-off Acquires Crucial Formation Data (Petrom)

Case Study: Logging objectives achieved after logging was cancelled (Bulgaria)

• Costs and risk threatened the economics of a horizontal drilling development program in eastern Ukraine

• WFT’s PrecisionPulse MWD system and Compact Well Shuttle technique was used to successfully achieve Well and Logging Objectives

• Standard wireline deployed tools bridged @ 4106m.

• After several failed attempts, logging was cancelled.

• TDL logging successful. Recommendation letter from client

• Significant rig time savings by navigating the

tools past well obstructions without requiring a

separate cleanup trip.

• CDO operation took only 9 hours of rig time


Conclusions

• Weatherford’s unique Compact and Assure Conveyance options deliver a wide range of formation evaluation answers in wells where no one else can log

• Case studies in every region document that we reduce operating costs and acquire high-quality data in holes deemed “impossible” by others

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