thums long beach automated safety systems · prevention first 2008 safety system requirements...
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Prevention First 2008
THUMS Long BeachAutomated Safety Systems
Prevention First 2008
Presentation Agenda
Introduction to Thums Evolution of Safety Systems at ThumsSafety System RequirementsSafety System ArchitectureSafety System TestingQuestions and Answers
Prevention First 2008
THUMS – A Unique Facility
Background information– State of California –Owns 90% of the
Wilmington Oil and Gas Field, Fourth largest in the USA
– Operator – City of Long Beach – Field Contractor -THUMS/Occidental
•Facilities 4 man-made islands1 pier facility1 gas processing facility1 power plant
•Peak rate 150,000 BOPD in 1969•Present rate 30,000 BOPD•Injection rate 1,000,000 BPD•737 producers and 455 injection wells•50 MW/H annual electrical load
THUMS/Occidental PetroleumField Contractor for oil producing property in Long Beach, Ca
Prevention First 2008
Thums Islands and Subsea Pipelines
White
Chaffee
Freeman
GrissomWhite
Chaffee
Freeman
Grissom
Pier J
Prevention First 2008
Evolution of Safety Systems at Thums
Safety by DesignProduction and Injection Wells located in CellarsSecondary Containment on Islands
Automation Safety System UpgradeProcess Hazard Review for Critical SystemsSubsea Line Emergency Shutdown ValvesSegregation of Process and Critical ShutdownsRedundant Safety System ProcessorInter-Island Communication
Prevention First 2008
Safety in Original DesignSecondary Containment
At SeawallProduction Cellars
Prevention First 2008
Subsea Line ESD Valves
Prevention First 2008
Safety System Requirements
Shutdown ProductionFWKO Levels and PressuresHigh Tank LevelsCellar Gas Detection
Isolate Subsea LinesHigh and Low Subsea Line PressureESD Valve Closure
Divert at J-2 (Shore Facilities)Divert oil on high FWKO levelDivert water on high pressure
FailsafePower and Air required to maintain operations.Valves fail to predefined positions on loss of power or airSystem response predefined for transmitter failure
Prevention First 2008
Safety System Architecture
Redundant Safety PLC for each locationSegregation of Critical and Process InterlocksDedicated Safety system transmitters and valvesMicrowave Ring to communicate with other locationsSeparate IT network for Automation systemHand shaking communication between Safety PLCs on each locationUninterruptible Power Supply for Safety PLCSafety PLC in secured location, limited accessOperator Paging System for Alarms
Prevention First 2008
Island Control System Architecture
ES
Safety I/O
OSClient
Field I/O
Self-Healing Ethernet Fiber Optic Ring
FieldEnclosure
OS
OSClient
ServerServer
OSClient
AS-417H AS-417H
AS-417HAS-417H
Network Switch
Field I/O Field I/O
Uplink to Microwave
Safety PLC
Prevention First 2008
Automation Network
Island Grissom OS Servers
Island White OS Servers
Island Chaffee OS Servers
Island Freeman OS Servers
Pier JOS Servers
THUMS Corporate Office
Central Archive Server
Automation Network is separate from the IT Network using VPN and Switches
Important Points about Automation Network
Only Automation computers are allowed on the Automation NetworkArchive Server is the only computer on both the IT and Automation Network. Networks protected by firewalls within server
Prevention First 2008
Safety PLC and Server Racks
Prevention First 2008
Operator Control Station (HMI)
Prevention First 2008
Operator Shut-in System Graphic
Prevention First 2008
Operator Cellar Isolation Graphic
Prevention First 2008
Safety System Testing
Quarterly DOG TestingPartial Stroke Testing of Subsea line ESD ValvesTesting of Cellar Gas DetectionTesting of Shut-in DevicesTesting of Switches and Buttons
Annual DOG TestingFull closure test of Subsea ESD ValvesQuarterly DOG Tests
