cement integrity for life of the well l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Cement Integrity for Life of the Well PowerPoint Presentation
Download Presentation
Cement Integrity for Life of the Well

Loading in 2 Seconds...

play fullscreen
1 / 24

Cement Integrity for Life of the Well - PowerPoint PPT Presentation


  • 507 Views
  • Uploaded on

Cement Integrity for Life of the Well. Perry Beaudoin Les Hendricks Halliburton Energy Services. Why be concerned about Cement Integrity for the life of the well? . Pressure on the annulus side after the well has been cemented and put on production Annular Gas Flows

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Cement Integrity for Life of the Well' - daryl


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
cement integrity for life of the well

Cement Integrity for Life of the Well

Perry Beaudoin

Les Hendricks

Halliburton Energy Services

why be concerned about cement integrity for the life of the well
Why be concerned about Cement Integrity for the life of the well?
  • Pressure on the annulus side after the well has been cemented and put on production
  • Annular Gas Flows
  • Premature water production
  • Casing collapse
remedial options due to bond failure
Remedial Options Due to Bond Failure
  • Monitor document and produce
remedial options due to bond failure4
Remedial Options Due to Bond Failure
  • Monitor document and produce
  • Squeeze cement
remedial options due to bond failure5
Remedial Options Due to Bond Failure
  • Monitor document and produce
  • Squeeze cement
  • Abandon the Well
processes inducing changes in cement sheath
Processes Inducing Changes in Cement Sheath
  • The Stresses of a Cement Jobs Life
    • Mechanical shocks from pipe tripping
    • Expansion of the casing and compression of the cement during pressure testing
    • Expansion and contraction of the pipe due to cycles in production pressure and temperature
    • Formation movement
large scale stress testing conventional cement
Large Scale Stress TestingConventional Cement
  • 5 1/2” pipe cemented inside 7 5/8” casing
  • Inner pipe pressured in stages until cement failure was indicated at 31 Mpa
conventional cement
Conventional Cement
  • Cement became brittle
  • Radial cracks formed
  • Cement bond failed creating a microannulus
foam cement is ductile
Foam Cement is Ductile
  • No radial cracks
  • Only slight debonding
  • Foamed cement deformed and absorbed the expansive energy without failure due to its elastic nature
foam cement
Foam Cement

Foam Cement is a “system” containing cement, additives, foam surfactant, a gas (usually nitrogen), and water.

benefits of foam cement
Lightweight

Excellent strength- to-density ratio

Improved mud removal

Gas migration preventative

Expands (compressible)

Ductile

Stable to crossflows

Insulates

Stable at high temperatures

Flexible system

Low permeability

Benefits of Foam Cement
gas migration prevention

Fluid

Loss

Gas

Entry

Gas Migration Prevention

FlowThrough Unset Cement

  • Overbalance pressure is lost
  • Fluid loss (volume) to lower pressure zone
  • Gas enters wellbore and percolates up annulus
hydrostatic pressure loss

Cement

Fluid

Cement

Sets

Cement

Hardens

Cement

Gels

Overbalance

Pressure

Formation Gas Pressure

Hydrostatic Pressure

Time

Hydrostatic Pressure Loss
foam cement16
Foam Cement

Cement

Fluid

Cement

Sets

Cement

Hardens

Cement

Gels

Overbalance

Pressure

Formation Gas Pressure

Hydrostatic Pressure

Time

equipment required
Equipment Required

Cement Unit

Injection Unit

Nitrogen Unit

summary
Summary
  • Optimum production of hydrocarbons is linked to integrity of cement sheath.
summary23
Summary
  • Life of the Well Cement process has been successfully applied in N.E. British Columbia in over 200 wells to provide superior cement integrity.
summary24
Summary
  • Weak Zone / Loss Circulation
  • Lightweight foam cement lowered the hydrostatic of cement column.