Casing Deformation Associated with Multi-fracturing  - Causes and Methods of Reducing the Damage

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Disciplines: Completions | Production and Operations

Course Description

Hydraulic fracturing places both static and dynamic stresses on casing and completion components that may not be apparent in conventional design programs. Non-uniform loading of formations, casing and cement may be driven by cyclic pressures of several thousand psi, temperature swings of over 100^o F, erosion by proppant, and shock loading of the completed well. These problems can result in both temporary and permanent deformation or even well failure in rare cases. This course examines real-world case histories of casing deformation and isolation failure linked directly or indirectly to fracturing-induced stresses and covers the design and operational changes necessary to mitigate these problems. This 1-day course is example based and delivered as a lecture with videos, downhole measurements, and case histories.

Agenda:

1. Introduction – where damage is occurring and general occurrence frequency in basins.
2. Basics of well design for fracturing – vertical and horizontal – from wellhead to toe.
3. Dog Leg Severity – reported and actual values, causes, and potential corrections.
4. Coupling selection – makeup, stresses, problems, and solutions.
5. Cementing issues – bonding vs annular fill, importance of TOC in design and execution
6. Max pressures during fracturing and cyclic pressure fatigue of tubulars and cement
7. Erosion from wellhead to toe – cause and avoidance.
8. Temperature effect on tubular collapse resistance from cool frac fluids in hot formations
9. Shock loading impacts on pipe and formation.
10. Effects of annular pressure.
11. Ovaling of the casing and risk of stuck frac plugs.
12. Fracture driven interactions (aka “Frac Hits”) damage to parent and child wells.
13. Risks faced in refracturing.
14. Repair methods

Learning Level

Introductory

Course Length

1-day

Who Attends

Suitable for students, foremen, engineers, and managers.

Special Requirements

Attendees should bring a laptop.

CEUs

0.8 CEUs (Continuing Education Units) awarded for this 1-day course.

Cancellation Policy

All cancellations must be received no later than 14 days prior to the course start date. Cancellations made after the 14-day window will not be refunded. Refunds will not be given due to no show situations.

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SPE reserves the right to cancel or re-schedule courses at will. Notification of changes will be made as quickly as possible; please keep this in mind when arranging travel, as SPE is not responsible for any fees charged for cancelling or changing travel arrangements.

We reserve the right to substitute course instructors as necessary.

Instructor

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