Course Description
Workover is performed after the initial completion to re-establish commercial production or injection, repair of a mechanical problem in the well, or plug and abandon the well.
Workover operations are usually initiated as hydrocarbon production rates decline substantially.
Undesired fluid production could be the result of a poor primary cement job or water / gas coning. These workovers typically involve a remedial cement job to control the unwanted water / gas production.
Well completion is performed at the completion of drilling operations to establish initial production from or injection into a well. Procedures of completion will vary depending on the completion type and the area.
For Example, flowing wells can simply be perforated and put on production. Low reservoir pressure areas often require an artificial lift mechanism (rod or submersible pump, gas lift valves, etc.) to produce at economic rates.
Objectives
Plan, design, manage and execute completion operation
Improve the overall operational performance during workover operations
Select or recommend completion equipment for given field conditions and applications
Select the most commonly used downhole tools and explain their function
Training Methodology
Introduction and pretest to evaluate the level of attendees to know the major points they do not know to cover it
Presentation with clear font and background including animation and videos
Exercise and round table discussion
Post Test to evaluate the level of attendees understanding after the course
Organisational Impact
Employees who receive training have increased confidence and motivations
Lower cost of production – eliminates risks because trained personnel are able to make better
Lower turnover – brings a sense of security at the workplace which in turn reduces labor turnover
Change management –involvement of employees in the change process
Personal Impact
• Supervise wok over operations
• Improve risk awareness for workover and completion operations
• Troubleshooting the well problems
• Minimize downtime for well operations
• Prepare full workover program
WHO SHOULD ATTEND?
• Production Technologists
• Production Engineers
• Operations Engineers
• Field Technicians
• Workover Engineers
Course Outline
DAY 1: Types of Completions
• Introduction
• Wellhead Configuration
• Functional Requirements of a Completion
• Completion Equipment
• Flow Control Devices
• Packers
• Tubing
• Circulation Devices
• Expansion Joints
• Sub-Surface Safety Valves
• Christmas Trees and It’s Types
• Surface Equipment
DAY 2: Reasons for Workovers and Well Preparation
• Formation Damage
• Sand Control
• Acidizing
• Corrosion
• Hydraulic Fracturing
• Mechanical Problems
• Well Preparations for Work Over
• Tree and BOP Removal / Installation
DAY 3: Overview of Surface and Subsurface Wellbore Equipment and Procedures
• Blowout Preventer Stacks and Components
• Work string and Production Tubing
• Auxiliary Well Control Equipment
• Plugs & Packers
• Verification of Shut-in
• Monitoring and Recording During Shut-in
• Preparing for Well Entry
• Wireline Open Hole Operations
• Contingency Procedure for Wireline
• Contingency Procedures for Coiled Tubing
• Contingency Procedure for Coiled tubing
DAY 4: Barriers, Completion and Workover Fluids
• Philosophy and Operation of Barrier Systems
• Levels of Barriers
• Types of Barriers
• Barrier Management
• Influx Detection
• Gas Characteristics and Behavior
• Pressure and Volume Relationship (Boyles Law)
• Workover / Completion Fluid Functions
• Liquids and Fluid Properties
• Testing of Downhole Completion Equipment
• Testing of Well Control Equipment Connections
• Well Control Drills
DAY 5: Natural Flowing & Artificial Well Work Over Programs
• Well Shut-in and Well Kill Considerations
• Well Control Problems
• Objective of Well Control Techniques
• Bull heading
• Volumetric Method
• Lube and Bleed
• Forward Circulation
• Driller’s Method
• Reverse Circulation
• Handling Kill Problems
• Potential Impacts of a Well Control Event
• Well Integrity
• Pressure Control Equipment / Barrier Envelope Considerations
• Personnel Assignment
• Plan Responses to Anticipated Well Control Scenarios
• Blockages& Trapped Pressure in Tubing / Wellbore
• Blockage & Restricted Access in Tubing / Wellbore
• Hydrates
• H2S considerations
• Natural Flowing and Artificial Well Work Over Programs
