Guidelines for Offshore Tanker Operations

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Published Date

September 2018


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Guidelines for Offshore Tanker Operations

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This publication provides guidance on the general principles, procedures and equipment required to safely moor and transfer cargo between offshore terminals and offtake tankers.

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This publication provides information and guidance on the safe management of the interface between offshore terminals and offtake tankers, focussing on F(P)SO and SPM buoy terminals and conventional and DP tankers. It will be of use to tanker technical operators, terminal operators, tanker-based personnel, terminal-based personnel, offshore project development teams and regulatory officials.

 

It updates and supersedes the following OCIMF publications:

 

  • Offshore Loading Safety Guidelines with Special Relevance to Harsh Weather Zones
  • Tandem Mooring and Offloading Guidelines for Conventional Tankers at F(P)SO Facilities
  • Recommendations for Equipment Employed in the Bow Mooring of Conventional Tankers at Single Point Moorings.

Section one – Applicable codes and standards

1.1       Offshore terminals used for cargo transfer

1.2       Offtake tankers

 

Section two – F(P)SO subsea mooring and cargo transfer philosophy

2.1       Definition and application

2.2       Operating environments

2.3       F(P)SO subsea mooring configurations

2.4       F(P)SO location relative to other structures

2.5       Basis of design and cargo transfer philosophy development

 

Section three – Offshore terminal mooring configuration and equipment

3.1       Introduction

3.2       Mooring system design

3.3       Using simulation of motions and forces to assess likely hawser loads

3.4       Single and dual hawser mooring systems

3.5       Mooring system equipment

 

Section four – Offshore terminal cargo transfer configuration and equipment

4.1       Configuration

4.2       Cargo pumping system

4.3       Custody transfer system

4.4       Manifold

4.5       Hose flushing configurations

4.6       Cargo hoses and equipment

4.7       Quick release couplings

4.8       Cargo hose end fittings

4.9       Overpressure and surge protection

4.10     Cargo containment

4.11     Lifting and other equipment

4.12     Terminal interface for offtake tanker surge prevention and overpressure protection

4.13     Terminal interface for offtake tanker equipment maintenance and repair

 

Section five – Offtake tanker mooring and cargo transfer equipment and configuration

5.1       All offtake tankers

5.2       Offtake tanker technical operator responsibilities

5.3       Conventional tankers

5.4       Bow loading tankers

 

Section six – Station keeping

6.1       Conventional tankers

6.2       Station keeping using tugs

6.3       Mooring layout for tug escort and pull-back, and aft mooring deck design

6.4       Stern mooring winch configuration

6.5       Disconnection of towline

6.6       DP systems

 

Section seven – Personnel transfer facilities

7.1       General

7.2       Support vessel transfer

7.3       Basket transfer

7.4       Helicopter transfer

7.5       Other information

 

Section eight – Conventional tanker operations

8.1       Introduction

8.2       Night operations

8.3       Competence of offshore operations personnel

8.4       Communication requirements for operations

8.5       Terminal operational factors

8.6       Conventional tanker approach to terminals

8.7       Pre-arrival preparations

8.8       Pre-mooring preparations

8.9       Mooring operations

8.10     Pre-transfer conference

8.11     Cargo hose connection

8.12     Station keeping management

8.13     Cargo handling

8.14     Disconnection and unmooring

8.15     Manning and watch standing

8.16     Environmental limitations for cargo transfer operations

8.17     Requirements for support vessels

8.18     Mooring and line handling

8.19     Cargo hose handling

8.20     Tug assistance overview

8.21     Offshore terminal: organisation and responsibilities

 

Section nine – DP bow loading tanker operations

9.1       General

9.2       Safety critical elements

9.3       Operational safety

9.4       Training and competence of offshore operations personnel

9.5       F(P)SO operational factors

9.6       Approach to terminals

9.7       Pre-transfer conference

9.8       Station keeping operations

9.9       Cargo handling

9.10     Disconnection and unmooring

9.11     Manning and watch standing

9.12     Requirements for support vessels

9.13     Use of Tanker Assist Vessels at offshore terminals

9.14     Offshore terminal: organisation and responsibilities

 

Section ten – Risk management

10.1     General

10.2     Offshore cargo transfer operations: general

10.3     Hazards and effects management process

10.4     Offshore terminal to conventional tanker cargo transfer hazard identification

10.5     Risk assessment

10.6     Risk control

10.7     Mitigated risk assessment

10.8     Recovery measures

10.9     Primary field risk management methodology: field operator and offtake tanker technical operator interface

 

Section eleven – Emergency and contingency planning

11.1     Emergency scenarios

11.2     Emergency towing and standby vessel specifications

 

Appendices

 

Appendix A – Types of offshore terminals

A1        General

A2        Surface F(P)SOs

A3        Surface Single Point Mooring systems

A4        Sub-surface loading systems

A5        Offshore terminals for use in ice

A6        Dynamically Positioned Loading Terminal

 

Appendix B – Recommendations for DP bow loading tanker training and experience

B1        DP offtake tanker training: general

B2        Offshore loading training

B3        Emergency tow training exercises

 

Appendix C – Assurance processes for DP bow loading tankers

C1        Purpose

C2        Background

C3        Acceptance of new offshore terminals and new offtake tankers intended to be regularly used in the field (primary and secondary pool tankers)

C4        Ongoing acceptance of regularly used offtake tankers (primary or secondary pool tankers)

C5        One-off acceptance of previously unapproved alternative tankers at short notice

 

Appendix D – Tanker Assist Vessel for DP bow loading operations

D1        Overview

D2        Equipment requirements

D3        Tanker Assist Vessel operations

 

Appendix E – Examples of conventional tanker–terminal information exchanges

E1        Pre-mooring checklist (Mooring Master and conventional tanker Master exchange)

E2        Pre-cargo transfer conference checklist

E3        Pre-departure checklist

E4        Watchkeeper SPM position reporting guide

 

Appendix F – DP bow loading operational checklists

F1        Example of DP bow loading tanker and terminal operations checklists

F2        Example offshore terminal checklists

F3        Example DP bow loading tanker checklists

 

 

 This publication aims to promote harmonisation and compatibility between offshore terminals and offtake tankers, by providing guidance on equipment and procedures for mooring and cargo transfer of crude oil and other petroleum products.

 

The guidelines are aimed at tanker technical operators, terminal operators, tanker-based personnel, terminal-based personnel, offshore project development teams and regulatory officials. The main focus of the guidelines is on the safe management of the interface between offshore terminals and offtake tankers.

 

This publication updates and supersedes the following OCIMF publications:

 

  • Offshore Loading Safety Guidelines with Special Relevance to Harsh Weather Zones
  • Tandem Mooring and Offloading Guidelines for Conventional Tankers at F(P)SO Facilities
  • Recommendations for Equipment Employed in the Bow Mooring of Conventional Tankers at Single Point Moorings.

 

This publication also includes work from an OCIMF work group on Dynamic Positioning (DP) bow loading tankers at offshore terminals, which was set up to develop the concepts in the Oil and Gas UK (previously UKOOA) Tandem Loading Guidelines for worldwide use. OCIMF is grateful to Oil and Gas UK for their permission to incorporate sections from the Tandem Loading Guidelines into this publication.

 

Field operators should conduct field-specific risk assessments and set field-specific standards to ensure safe operations. Recommendations in this publication may be supplemented by requirements from project development teams, tanker technical operators and terminal operators. Some countries have enacted Coastal State regulations that address offshore tanker operations within their territorial waters or Exclusive Economic Zone (EEZ) which must be complied with. This publication should not replace, but provide additional guidance to, any Coastal State or international regulations or the individual terminal operator’s specific procedures.

 

In addition to the guidance in this publication, further guidance on the risk management of F(P)SO operations is available in the following publications:

 

  • Guidelines for Managing Marine Risks Associated with FPSOs, International Association of Oil and Gas Producers (IOGP)
  • Tandem Loading Guidelines, Oil and Gas UK.

The Oil Companies International Marine Forum (OCIMF) is a voluntary association of oil companies with an interest in the shipment and terminalling of crude oil, oil products, petrochemicals and gas. OCIMF focuses exclusively on preventing harm to people and the environment by promoting best practice in the design, construction and operation of tankers, barges and offshore vessels and their interfaces with terminals. Learn more at www.ocimf.org

Title: Guidelines for Offshore Tanker Operations
Number of Volumes: 1
Edition: 1st Ed 2018
Number of Pages: 250
Product Code: WS1634K
ISBN: ISBN 13: 978-1-85609-782-6 (9781856097826), ISBN 10: 1-85609-782-X (185609782X)
Published Date: September 2018
Binding Format: Hardback
Book Height: 305 mm
Book Width: 215 mm
Book Spine: 20 mm
Weight: 1.40 kg
Author: Oil Companies International Marine Forum

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