Well Abandonment and Decommissioning Procedure and Relevant Costs Management

Scope of Well Abandonment is to effectively seal-off all distinct permeable zones (i.e.,

the zones of potential hydrocarbons or water inflow (permeable zones penetrated by

the well or perforated casing zones), to ensure that formation fluids are isolated, both

within the wellbore and in annular spaces, that their migration among different

formations and/or up to surface/seabed is duly prevented to protect the external

environment.

• Drilling Engineers
• Drilling Supervisors
• Junior Directional Drillers
• Senior Well Engineers
• Mud engineers
• Tool Pushers

Course structure:

Lecture (60%)

Videos (20%)

Case Studies (10%)

Discussion (10%)

Course Assessment: 

• Pre test 
• Post Test

Day-1

• Principles of well abandonment
• Temporary well abandonment program
• Temporary well abandonment requirements
• During well construction
• Open hole
• Deepest casing or liner shoe
• Liner topmost equipment
• Top hole
• After a well test
• Deepest casing or liner shoe
• Cased hole perforated zones
• Lower completion
• Liner topmost equipment
• Completed well

Day-2

• Permanent well abandonment of exploration wells
• Permanent well abandonment program
• Permanent well abandonment requirements
• Open hole
• Deepest casing or liner shoe
• Cased hole perforated zones
• Cased Hole Unperforated Zones
• Liner topmost equipment
• Casing annuli
• Casing annuli with top of cement at surface or seabed
• Casing annuli with top of cement below surface or seabed
• Casing stub termination
• Top hole
• Wellhead, residual top head tubing/casing string and conductor Pipe recovery
• Ground level and seabed restoration.

Day-3

• Permanent well abandonment of development wells
• permanent well abandonment program
• permanent well abandonment requirements
• wells with pressure in the casing annuli
• well path below the packer
• liner topmost equipment
• casings annuli
• casing stubs termination
• cased hole unperforated zones
• top hole
• wellhead, residual top head tubing/casing string and
• Conductor pipe recovery
• ground level and seabed restoration
• wells without pressure in the casing annuli
• wells in which all the casing annuli have the top of
• Cement above the previous casing shoe or at surface
• well path below the packer
• Well path above the packer
• Wellhead, tophead tubing/ casing string and
• Conductor pipe recovery
• Ground level or seabed restoration

Day 4

• Operations execution
• Cement plugs
• Tests of cement plugs and mechanical
• Cement squeeze
• Sealing annuli casing/casing through perforations
• Dry tree
• Single annulus
• Multiple annuli
• Wet tree
• Single annulus
• Multiple annuli
• Casing and tubing cutting
• Casing cutting depth
• Tubing cutting depth
• operations on wellhead
• Times estimate
• Well abandonment costs management
• Well abandonment costs estimate
• Temporary well abandonment costs estimate

Day 5

• Permanent well abandonment costs estimate for exploration Wells
• Permanent well abandonment costs estimate for development Wells
• Well abandonment costs optimization
• Final permanent well abandonment costs estimate
• Well abandonment costs estimate monitoring
• Well abandonment costs control
• Temporary well abandonment program and relevant costs
• Permanent well abandonment program and relevant costs
• Responsibilities

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