GENERAL RELIEF WELL STRATEGY
EXAMPLE TABLE OF CONTENTS
1.0 Background
Evolution of Relief Well Technology |
The early days |
The 1970’s and 1980’s |
The 1990's |
Quick Relief Well Planning Guide |
References |
Other Relief Well Related Publications |
Table 1.1: Relief Well Planning Considerations |
Figure 1.1: Top Level Relief Well Design and Implementation Process Diagram |
Figure 1.2: Generic Relief Well Design Flow |
2.0 Well Control Management System
Background |
Introduction |
Major Subsystems |
Incident Response Management |
Training and Drills |
Technology Management |
Risk Management |
Information Management |
Figure 2.1: Well Control Management Critical Components |
Figure 2.2: Well Control Management Critical Components for Three Levels of Response |
Incident Response Features |
Incident and Response Levels |
Figure 2.3: Example Well Control Incident Evaluation Flow Chart |
Figure 2.4: Example Level 3 Incident Response Phases |
Well Control Management Justification |
Figure 2.5: Time verses Cost, Lost Production/Pollution and Image |
3.0 Specific Relief Well Contingency Plans
Hazard Management for Blowout Control |
Table 3.1: Simple Impact Matrix |
Table 3.2: Example Risk/Impact Matrix |
Example Situations of a Blowout having High Impact on an Operating Company |
Example Situations with Higher Risk for Well Control Problems |
Example Situations Where Quickly Executing a Relief Well May be Difficult |
Basic Hazard Management Techniques |
Hazard Management Process |
Figure 3.1: Example Hazard Event Tree |
Risk Assessment |
Figure 3.2: Example Framework of Hazard Identification and Assessment |
Example Specific Relief Well Contingency Contents |
Example Blowout Scenarios |
Example Table of Contents for Above Contingency Plan |
Well Planning to Facilitate Relief Well Control |
Identify High Risk Areas, Structures and/or Wells |
Relief Well Contingency Plans |
Accurate Well Information |
Surface Wellhead Uncertainty |
Borehole Uncertainty |
4.0 The Initial Planning Cycle
Initial Incident Briefing |
Purpose and Timing |
Briefing Agenda |
Initial Incident Briefing Report |
Detailed On-site Incident Assessment |
Purpose and Timing |
Guidelines |
Incident Assessment Report |
Archived Data Collection |
Purpose and Timing |
Guidelines and Personnel Involved |
Example Data Requirements - General |
Example Data Requirements - Kill Unit |
Initial Tactical Operations Planning |
Purpose and Timing |
Meeting Agenda Guideline |
Work Products |
Initial Planning Process Guidelines |
Purpose and Timing |
Initial Planning Objectives |
Develop the General Plan |
Purpose and Timing |
Personnel Involved |
General Objectives - Surface Control |
General Objectives - Relief Well |
Relief Well Guidelines for Drilling - Checklist |
5.0 Relief Well Response Organization
Source Control Section |
Source Control – Relief Well Branch |
Relief Well Branch- Special Services - Intersection Unit |
Relief Well Branch- Special Services - Kill Unit |
Source Control - Planning Section |
6.0 Daily Planning Cycle 6
Source Control Daily Briefing |
Relief Well - Intersection Shift Briefing |
Relief Well - Intersection Planning Meeting |
Relief Well or Surface - Kill Planning Meeting |
Relief Well Plan Implementation Checklist |
7.0 Initial Strategy – Defining Problems, Constraints and Objectives
Blowout Diagnostics |
Figure 7.1: Blowout Diagnostics Flow of Events |
Formulate Relief Well Kill Objectives |
Define Known and Diagnosed Constraints to Relief Well Intersection and Kill |
Define Relief Well Drilling and Geological Hazards and/or Constraints |
Define Surface/Seabed Constraints to Rig Placement |
Define Position Uncertainty of the Blowout and Adjacent Wells |
Define a Primary and Secondary Kill Point for Analysis |
Establishing Hydraulic Communication |
8.0 Objectives for Relief Well Intersection and Drilling Units
Define Attack Angle and Proximity at Kill Point |
Define Homing-in (Casing Search) Strategy |
Surface Uncertainty |
Borehole Uncertainty |
Recommended Number of Relief Wells |
Technical Risks to Evaluate |
Consequences to Evaluate |
Surface Location Determination |
Relief Well(s) Trajectory |
Specific Drilling Operational Procedures |
Relief Well Guidelines for Drilling and Intersection Units - Checklist |
Summary of Vector Magnetics Wellspot Service |
Principles of Standard Wellspot Operation |
Wellspot Capabilities |
Strategies for Well Location using Wellspot |
Quantifiable Range of the Wellspot Instruments |
Table 1: Wellspot Tool Specifications |
Figure 12.1: Schematic of Down Hole Current Injection |
Figure 12.2: Surface Current Injection |
Wellspot RGR Instrument |
9.0 Hydraulic Kill Planning Strategy
Modeling the Blowout |
Modeling the Kill Hydraulics |
Blowout and Kill Model Requirements |
Inputs and Data Acquisition |
Example Input Data Sheet |
Kill Planning Flowchart |
Relief Well Guidelines for Kill Planning – Checklist |
Relief Well Casing Considerations |
Surface Kill Equipment Requirements |
High Pressure Pumps and Manifolds |
Low Pressure Manifolds and Pumps |
Kill Mud Storage and Transfer Equipment |
Control and Monitoring Equipment |
Kill Platform Analysis and Selection |
Relief Well Drilling Rig Requirements (offshore) |
Special Equipment and/or Materials for the Operation |
Kill Equipment QA and Documentation |
10.0 Reference Publications