Sable Offshore Energy Project

The Sable Offshore Energy Project (the Project) involves the production of natural gas and condensate from five offshore fields near Sable Island, which is located approximately 225 km off the east coast of Nova Scotia. The five fields are: Venture, South Venture, Thebaud, North Triumph, and Alma. SOEP is operated by ExxonMobil Canada Ltd. (ExxonMobil) with its partners Shell Canada Limited, Imperial Oil Resources Limited, Pengrowth Energy Corporation, and Mosbacher Operating Ltd.

Production began in December 1999.   The Development Plan estimated that there were 85 billion cubic metres (3 TCF) of recoverable gas reserves and 11.9 million cubic metres (75 MMbbl) of condensate that would be produced over the life of the Project, which was estimated as about 25 years. The production facilities were designed for a production volume of 14.4 E6M3/d of raw gas (505 MMscf/d) yielding 13 E6M3/d (460 MMscf/d) of sales gas. The offshore fields were developed in two tiers. Tier I fields are Thebaud, Venture and North Triumph. Thebaud began production December 31, 1999 followed by Venture and North Triumph in February 2000. Tier II fields are Alma, and South Venture. Alma began production in November 2003 followed by South Venture in December 2004. A total of 21 development wells have been drilled in the five fields.

Central facilities are installed at Thebaud for production, compression, utilities and accommodation. Satellite platforms are located at Venture, North Triumph, Alma and South Venture. These are unmanned wellhead platforms. The central Thebaud facility has systems for remote monitoring and control of the other platforms. Each of the unmanned platforms is equipped with a helideck and emergency accommodations. Hydrocarbons produced at the satellite platforms are transported through a system of subsea flowlines to the Thebaud platform.

Raw gas from the five fields is separated and dehydrated at the Thebaud platform. The separated gas and hydrocarbon liquids and condensates are then recombined and transported through a subsea pipeline to landfall in the Country Harbour area of Guysborough County, Nova Scotia and then to a gas processing plant at nearby Goldboro. There, the gas is conditioned by removing natural gas liquids, condensates and remaining water. The sales gas then flows to markets in eastern Canada and the northeastern United States through an onshore pipeline. Natural gas liquids and condensate are transported by another onshore pipeline to a fractionation plant at Point Tupper for further processing before being sold.

In late 2017, ExxonMobil commenced the plugging and abandonment of the 21 production wells, starting firstly with those wells located in the Thebaud field.  This involves the use of jack-up drilling rig (the Noble Regina Allen) to set mechanical and concrete plugs in strategic locations within the wellbore to permanently seal the well. This is to prevent hydrocarbons from migrating up hole over time and possibly contaminating other formations, or leaking into the ocean. Preparatory activities for the eventual decommissioning and removal of the offshore platforms located at each of the five offshore fields has also commenced.  This will take place after all of the production wells have been plugged and abandoned, and production from the Project has ended.   

Development Plan Application (Volume 2)

Volume 2A (pages i to 1-13)
Volume 2B (pages 2-1 to 2-48)
Volume 2C (pages 2-49 to 2-82)
Volume 2D (pages 3-1 to bibliography)

For more information see

Monthly production by field and well.

Sable Monthly Production plots.pdf 
Sable Monthly Production Reports.xls
Sable Monthly Production Reports.pdf

Decision Reports

Sable Offshore Energy Project Canada-Nova Scotia Benefits Plan and Development Plan Decision Report (1997)

Spill Response Plan

Sable Spill Repsonse Plan

*Note: For archived copies of the public review documents pertaining to this project, please email us at Info CNSOPB