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Major Hazard Management C-NLOPB Safety Forum – April 27-28, 2016

Major Hazard Management

Safety

Case

Major Hazard Identification

Major Hazard Risk

Assessment

Major Hazard Barriers

Barrier Management

Major Hazards …something that can cause a

major accident i.e.

• Multiple (5 or more) serious

injuries or fatalities

• Major damage to the rig or

environment

• Loss of the rig

The focus is not occupational /

personal safety

Major Hazards: Semi-sub

1. Hydrocarbons

a) Shallow gas

b) Hydrocarbons in formation during well operations

c) Hydrocarbons in formation during coiled tubing / wireline operations

d) Hydrocarbons in subsea assets

e) Hydrocarbons during well testing

f) Gas cut mud

2. Flammable / Combustible

Materials

7. Hydrogen Sulfide (H2S)

3. Explosives 8. Vessel Stability

4. Suspended Loads 9. Watertight Integrity

5. Station Keeping 10. Rig Moving

6. Helicopter

Major Accident Hazard Risk

Assessment (MAHRA)

• Two-day MAHRA workshop

• Formal Bowtie review

• One for each Major Hazard

• Confirms the hazards and

the identified barriers in

place to prevent or mitigate

• Risk assessment of the

major accident scenarios

assuming effective barriers

in place

Bowtie Diagrams

The Major Hazard is something

that can cause a major accident

e.g. Flammable Materials

Bowtie Diagrams

The Top Event is the initial loss

of control e.g. Fire

Bowtie Diagrams

Threats can cause the initial loss

of control e.g. Hot Work

Bowtie Diagrams

Preventative Barriers reduce the

likelihood that a loss of control will occur

e.g. Designated Hot Work Area

Bowtie Diagrams

The Consequences describe the

outcome if the loss of control escalates

e.g. asset damage

Bowtie Diagrams

Mitigating Barriers prevent escalation and

reduce the severity of the Consequence

e.g. Fire Detection System

Bowtie Diagrams

Barrier Escalation Factors can cause a

barrier to fail. They are supported by

their own barriers

Example Bowtie

Example Bowtie

• When ‘expanded’ they are much larger

Major Hazard Barriers

People

Plant

Process

Safety Critical Activities

People

Plant Process

Activity Activity

Activity

A Safety Critical Activity is …

… an activity that ensures that major hazard

barriers are implemented, monitored, tested and

verified

Something important done to support a major

hazard barrier

SCA Matrix & Worksheets

SCA Matrix

Job Position Worksheets

Preventative Barrier Doc. Ref.

Rig Move Procedure

planning6

Execution of Rig Move

Procedure6

Rig provided satellite

navigation equipment5

Bowtie 1a: Reservoir Hydrocarbons: Shallow Gas

Threat: Rig positioned incorrectly

Safety Critical Activities

Provide input to the planning of Rig Move Procedure

Ensure Rig Move Procedures are followed

Ensure the system is maintained as per RMS

Barge Supervisor Responsibilities

Overview

A Safety Critical Activity (SCA) is an activity for ensuring that major hazard barrier(s) are implemented, monitored,

tested or verified.

The following are the SCAs that the Barge Supervisor is responsible for.

Reference Document(s)

Marine Compliance Procedures (1)

Emergency Management Procedures (2)

World-wide Training Matrix (3)

Rig-specific Emergency Response Plan (4)

RMS (5)

Specific Rig Move Procedure (6)

Rig-specific Marine Operations Manual (7)

Environmental Policies and Requirements (8)

Health and Safety Policies and Requirements (9)

Mid-water and Harsh Environment Field Operations (10)

HSE Case

Health, Safety and

Environmental (HSE) Case

• Documents the management

of HSE risk on the rig

• Summarizes the MAHRA

process

• Communicates the key barriers

in place to manage major

hazards

• Including the Safety

Critical Activities

QUESTIONS?