© 2007 weatherford. all rights reserved. - petroleum · pdf file© 2007 weatherford....


Secure Your Gas!

Well Integrity Evaluation & Diagnostics

Oct 29th, 2014

Otilia MihailescuWireline Technical Sales


Agenda

• Introduction

• Current Well Integrity Problems

• Evaluation and Diagnostics

• Solution

• Conclusion

2


Introduction

3

• Rapid expansion of gas exploration• From 1920 to 2013 > 4 million hydrocarbon

wells drilled • Barrier or integrity failure up to 75% of

existing wells• US study on 3533 wells (2008-2011)• UK study of 2152 wells (1902-2013)• More than 30000 wells in Romania


Current Well Integrity Problems


Evaluation and Diagnostics Techniques

• Casing Inspection Tools

– CIT - Casing Imaging Tool

– MSC - Multi Sensor Caliper Tool

• Cement Bond Evaluation Tools

– CBT - Cement Bond Log Tool

– URS - Ultrasonic Radial Scanner Tool

• Fluid Diagnostics Tool

– GAPS - Geophone Array Production Survey

5


Casing Imaging Tool - CIT

– Percentage of internal and external casing defects

– Monitoring corrosion

– Casing wear or damage

– Perforation performance

– Casing weight / grade changes

– Burst Pressure

6


Casing Imaging Tool - CIT

7


Multi Sensor Caliper Tool - MSC

• Casing Geometry

• High resolution casing measurement

• Internal corrosion detection

• Mechanical measurement, temperature probe

• Casing deformation, Ovality, restrictions

88

Spring-loaded Feeler Arms

© 2007 Weatherford. All rights reserved. 9

Multi Sensor Caliper Tool - MSC


Cement Bond Log Tool - CBT

Measures the bond – between the casing and cement – the cement and the formation

Designed to be logged in combination with other Well Integrity Tools using ITB communication

– URS– CIT– MSC

Easy to centralize


Ultrasonic Radial Scanner Tool - URS

111111

High-resolution cement evaluation

– Channel identification – even in fiberglass casing

– Fluid identification behind casing

Casing Geometry

– Casing thickness analysis

– Internal corrosion detection

– Ovality


Ultrasonic Radial Scanner Tool - URS

12


Geophone Array Production Survey - GAPS

Planning and intervention / Integrity confirmation

Presence of flow behind casing

Direction of flow

Movement between layers

13


Solution – Prepare it

• Well Preparation

• Fishing Services

• Milling and pulling tools

• CLEARMAX Wellbore Cleaning Services

• MAX-Blade Casing Scraper

• MAX-Brush Tool

14


Solution – Fix it

• Casing Patches

– HOMCO Internal Casing Patch

• Cement Squeeze

• Solid Expandable System

– Metal Skin Cased Hole Liner

15


Solution – Complete it

• Cased Hole Completion Services

• Packers

• Flow Control

• Safety/Control valves

• In-Tubing Remedial Interventions

16


Conclusion

• New Life to Mature Wells – The Push for Well Integrity

• Single Source Services

• Permanent Casing Repair

• Full Range of Isolation Applications

• Optimize production and extend recovery rate with a cost effective integrated services

17

© 2007 weatherford. all rights reserved. - petroleum · pdf file© 2007 weatherford....

Documents