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OCS-Related Incidents -- Offshore Energy and Minerals Management

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    Cheryl Anderson

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   Gulf of Mexico Region

Spills ≥ 50 Barrels (2,100 gallons) – 1986

February 3, 1986 - Conoco, Inc.

Pollution: 119 bbl Crude Oil Operation: Pipeline
Rig/Platform: Platform A Lease: G01983
Area: Block: Ship Shoal
94		 Cause: Leak
Distance to Shore: 10 Miles Water Depth: 27 Feet
Pipeline Segment: 00580 Pipeline Diameter: 6 Inches

Remarks: A submerged 6" gas & oil pipeline from SS04A to SS145B developed a pinhole leak while line was being purged to abandon. A pollution spill occurred before the pipeline could be shut in. Response: the platform was shut in, and the Fast Recovery Unit was activated.

November 13, 1986 (2 days) - Mobil Oil Exploration & Producing Southeast I

Pollution: 52 bbl Hydraulic Fluid Operation: Construction
Rig/Platform: Platform 6 Lease: G04940
Area: Block: Green Canyon
18		 Cause: Leak & Human Error: coupling & judgement
Distance to Shore: 96 Miles Water Depth: 750 Feet

Remarks: Hydraulic fluid was released from leaking hydraulic couplings during underwater pile driving operations. Six separate incidents happened during a two day period.

December 30, 1986 - Shell Offshore, Inc.

Pollution: 210 bbl Crude Oil Operation: Pipeline
Rig/Platform: Platform A Lease: G01610
Area: Block: South Pass
65 		Cause: External Damage: anchor or construction
Distance to Shore: 9 Miles Water Depth: 300 Feet
Pipeline Segment: 03137 Pipeline Diameter: 8 Inches
Other Events:

Remarks: A submerged pipeline between platforms SP65-A and SP62A leaked from 13" long crack. The cause is thought to be either anchor dragging or initial construction damage casing material fatigue. Response: a 36'joint of pipe was cut out and replaced using hydrocouples.

OCS Report: MMS 87-0114

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Last Updated: 06/24/08, 02:42 PM

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