Stag Field Operations
|Activity type||Operation of a facility for the recovery or processing of petroleum|
|Lifecycle Classification||Operation & Production|
|Submitted by||Jadestone Energy (Australia) Pty Ltd|
|Submission date||11 September, 2020|
|Decision date||29 March, 2021|
|Link to previously accepted EP||4051 - Stag Field Operations|
Phone: +61 8 9486 6600
The Stag Facility is located in permit area WA-15-L and WA-6-PL approximately 60 kilometres (km) northwest of Dampier. Activities associated with the Facility include:
• A fixed Central Production Facility (CPF), producing and processing oil from a number of wells;
• A single 2 km long carbon steel export oil pipeline on the northeast side of the CPF connecting to a Catenary Anchor Leg Mooring (CALM) buoy via a flexible submarine hose;
• A flexible import hose from the CALM buoy that delivers oil to a third-party tanker. Once loading is complete, the tanker departs the field for delivery of cargo to market. No offtake activity from the third party tanker occurs in field;
• Water injection flowlines and wells to assist reservoir fluid recovery;
• Support/ supply vessels, work vessels and tug boats/ static tow vessels supporting third-party tanker movement, facility logistics, maintenance and provisioning; and
• Helicopter support.
Oil is loaded continuously to the third-party tanker at a production rate of up to 5,000 bbl/d. The CPF has been in production since 1998 with only minor modifications carried out during this time. Historical operations at the Stag Field have seen the inclusion of a floating, storage and offtake (FSO) vessel that has been moored in field and receives produced oil from the central production facility (CPF), and then offtake of the cargo to a third-party tanker. Recent operational and commercial developments have seen a shift to an operating model that requires only a third-party tanker and thereby permanent relinquishment of the FSO from the field, and therefore a revision to the current EP has been submitted.
The scope of this Environment Plan covers the operation of the offshore facilities for a period of up to 5 years from initial acceptance in December 2017.