Coiled Tubing Operation

DAY 1

Pre-Course Test

Module 1: Well Completion Types

• Definition of well completion
• Well completion Classification
• X-masTree
• Wellhead
• Casings
• Liners
• Production Tubing String
• Packers
• Sub-Surface Control Systems (SC-SSSVs)
• Wellhead Control System
• Artificial lift completions (ESP, GL)
• Smart Completions
• Impact of well completion selection  on future well intervention operations in wells

Module 2: Well Completion Operations

• Definition of well completion concept
• Perforation
  • Types
  • Guns
  • Bullets
  • Phasing
  • TCP
• Stimulation operation
  • Basics and concept
  • Candidates selection
  • Reservoir lithology  & impact on stimulation methodology
• Hydraulic Fracturing

Module 3: Well Intervention Operations

• Conventional:
  • Coiled Tubing Operations
    • Well kick-off operations
    • Stimulation
    • Scale Removal
    • Cement Squeeze
    • Fishing Operations
• Well-killing & securing for well routine maintenance operations
  • Wireline (Slick, E-line)
  • Snubbing operations
  • Well Testing (PTS, MPFM)
• Non-Conventional:
  • Well Control
  • Emergency
• Impact of well completion and well intervention operations

Module 4: Introduction to the Coiled Tubing Unit

• Introduction
• Coiled tubing description
• Coiled tubing equipment design
• Coiled tubing applications
• Coiled tubing advantages
• Coiled tubing disadvantages
• Group discussion & exercises

DAY 2

Quizzes & recap

Module 5: Coiled Tubing Surface Equipment

• Depth meter
• Gooseneck
• Injector head
• Coiled tubing reel
• Prime movers
• PowerPack
• Stripper (conventional, side door)
• BOP

Module 6: Surface Equipment Handling & Testing Procedures

• Depth meter
• Injector head
• Reel
• Power pack
• Control cabin
• Pressure control equipment
• BOP
• Stripper (conventional, side door)
• RTMS
• Auxiliary surface equipment

Module 7: Coiled Tubing Downhole Tools

• Standard threads
• Gripper connectors
• Connectors
• Check valves
• Nozzles & Jetting subs
• Swivel joint
• Release joints
• PRV
• Centralizers
• Accelerators
• Jars
• Overshots
• Spears
• Downhole Tractor

Module 8: Pre-Job Safety Procedures

• General requirements
• General HSE aspects
• PTW
• TBM
• Coiled tubing well control drill

DAY 3

Quizzes & recap

Module 9: High-Pressure Coiled Tubing
Module 10: Coiled Tubing Applications

• Matrix treatment
• Logging operations (open hole, Cased hole)
• Drilling contingencies
• Squeeze cement
• Under reaming/milling
• Inflatable packers and bridge plugs
• Coiled tubing drilling
• Coiled tubing completion
• Well Kick-off
• Fill Cleaning
• Scale removal
• Well control/killing
• Excessive water/gas shut-off
• Fishing operations
• P&A
• Artificial lift
• Sands/non-cementitious materials placement
• Case Studies
  • Matrix treatment operations
  • Logging Operations
  • Cement Squeeze Operations
  • Mill & under-reaming operations
  • Fill Cleaning 
  • Scale removal operations
  • Fishing operations of downhole lost tools
  • Well kick-off & Activation
  • Cement squeeze Operation

Module 11: Coiled Tubing Operation Procedure

• Pre-Job requirements
• Scaffolding
• Pre-job equipment requirements
• Coiled tubing rigging-up & function testing
• Treating line rigging-up & testing
• General running procedures
• Operational procedures:
  • Well Control/Killing
  • Well Kick-off
  • Nitrogen properties & uses
  • Fill cleaning
  • Scale removal
  • Excessive water/gas shut-off
  • P&A
  • Well stimulation
• Production logging pressure deployment procedures
• Fishing operations
• Rigging down and HSE requirements
• Coiled tubing stability during mobilization

Module 12: Coiled Tubing Technical Data

• Definitions
• Coiled tubing operating limits
• Burst pressure
• Collapse pressure
• Coiled tubing ovality
• Fatigue and corrosion
• Stress and strain
• Forces affecting the coiled tubing performance
• Buckling
• Depth correction and stuck point calculations
• Helicallock-up
• Catastrophic buckling

DAY 4

Quizzes & recap

Module 13: Coiled Tubing Contingency Procedures
Module 14: Coiled Tubing Operational Troubleshooting & Case History
Module 15: Coiled Tubing Maintenance
Module 16: Reservoirs and Rock Properties

• Definition of Reservoir
• Reservoir Heterogeneities
• Reservoir Characteristics:
  • Porosity
  • Permeability
  • Relative Permeability
  • Saturation
  • Natural Fracturing
  • Pressures
  • Reservoir Pressure
  • Basic Pressure calculations
  • Pressure Differential
  • Well Temperature
  • Drilling Fluids
  • Completion Fluids

Module 17: Formation Damage

• Types of formation damage
• Scaffolding
• Classification of Formation damage by process
• Sources of formation damage
• Skin and impact on well productivity
• Formation damage laboratory tests (return permeability test, formation
• an initiation pressure test, cake lift-off test, etc.)
• Formation damage from drilling mud/processes
• Formation damage from perforations
• Formation damage from completion and Workover fluid
• Formation damage from oil and gas production activities
• Formation damage from scales
• Formation damage from organic deposits
• Formation damage from Wettability changes
• Formation damage from Acid stimulation
• Formation damage from Injection (water injection, C02 injection, polymer flooding, steam flooding)
• Case Studies
  • Well productivity sudden decline and identifying proper treatment requirements
  • Production profile slope change& how to use the data in defining the problem
  • Utilizing a production history graph to detect the damage
  • How to use PBU/PFO tests to identify the skin factor as an indicator for formation damage.
  • Partial penetration and slanted skin effect
  • Impact of perforation skin factor

DAY 5

Quizzes & recap

Module 18: Stimulation of Sandston Reservoir

• Why stimulate a Sandstone reservoir?
• Sandstone reservoir description- mineralogy
• Acid formulation and lab tests e.g., acid response curve, compatibility test, return permeability test, etc.
• How much overflush is required
• How to avoid fluoride precipitation in sandstone stimulation
• Case study

Module 19: Stimulation of Carbonate Reservoir

• Why stimulate a carbonate reservoir?
• Carbonate reservoir description - mineralogy
• Acid formulation and lab tests e.g., acid response curve, compatibility test, return permeability test, etc.
• What is the big deal about wormholes?
• How to ensure the best acid coverage? Open hole? Cased hole?
• Acid placement in heterogeneous reservoir? Use of diverting agents
• How to ensure the best zonal coverage?
• Practical guidelines on how to select and evaluate acid treatment
• Case study

Module 20: Sand Control Completion Overview

• Sand production problem
• What are the consequences of sand production?
• Sand Detection
  • Sand monitoring
  • Measuring Sand production
• Sand Prediction and Monitoring
  • What causes sand production?
  • Types of sand failure
  • How to predict sand production in new wells
  • How to predict sand failure during well production
• Sand Control Completion
  • Selective perforation method
  • Cased hole gravel pack
  • Frackpack
  • Perforating for sand control
  • Frac pack completion: the success of a frac pack, frac pack limitations,
  • Frac pack fluids, frac pack installation, and treatment procedure
  • Gravel pack I Frac pack evaluation
  • Sand Control field operations step

   
Case study
Pre-Course test

• Understand the fundamentals & concept of the coiled tubing unit
• Increase awareness and knowledge of the coiled tubing operations and factors affecting its performance.
• Acquire necessary knowledge of the coiled tubing operational techniques, technologies and equipment.
• Understand alternate deployment scenarios and multisensory applications for surveillance and optimization.
• Possess the basic skills required to select and implement various coiled tubing techniques as per operational requirements.
• Be able to handle various coiled tubing emergency situations, plan its operations, and monitor and analyze its performance.
• Learn strategies and best practices for coiled tubing operations optimization
• Understand the geological and basic reservoir properties 
• Understand the formation damage concept and mechanism Understand the effect of formation damage on the revenue of the operator
• Understand the impact of skin damage effect on productivity for both vertical and horizontal wells. 
• Gain knowledge about various types of wellbore treatments to remove formation damage.
• Acquire knowledge on  how  to select the  best fluid  (less damaging)  at every phase  of the  well  development:  drilling, completion, cementing, perforating, stimulation, gravel packing, workover, production and injection operations