Angus Energy plc has completed a raft of measures to put Saltfleetby gas field in PEDL005 on course to be recommissioned in December 2021.
The company, which holds a 51% interest, has resumed the detailed design of the process facility, which is at an advanced stage.
Long lead equipment has been ordered and bespoke processing units have been tendered.
Several items of processing equipment are in fabrication, and design work leading to confirmation of all bulk materials is underway.
EQUIPMENT
Two gas compressor packages are being fabricated by specialist engineers in Kent.
Caterpillar gas engines and Ariel reciprocating compressor sections have been ordered and delivery confirmed.
Bulk materials for the skid-mounted unit and process manifolds fabrication have been ordered.
The first complete gas compressor package will be delivered to site in November.
Production process equipment for dehydration, dew point control, condensate stabilisation
and fuel gas treatment have been designed by a Hull-based engineering group.
Local UK fabricators have tendered for the build and their bids are under evaluation.
Process equipment including separators, storage tanks and enclosed ground flare system has
been sourced as surplus equipment from a recently decommissioned site in the vicinity.
Angus said the equipment would be recertified and slightly modified for use in the process facility, which would provide opportunity for schedule and budget savings.
FACTORY ACCEPTANCE TEST (FAT)
A gas commercial sales meter and analyser skid is being fabricated in the UK and the factory
acceptance test (FAT) of the complete package, including the remote communications link, is
scheduled for September.
The FAT will be attended by representatives from the National Grid as well as Angus’s engineering team, after which equipment will be delivered to the site.
Power generation with Caterpillar gas engine using fuel gas from the production process has
been ordered including electrical switchgear. Delivery to the site is due in October.
PROCESS FACILITY
Detailed design of the process facility continues with an Aberdeen-based engineering house.
The facility design has been iterated to include final equipment selections and is being matured
into the complete design package.
Bulk materials are being specified for subsequent order, civils and foundations designs are being progressed, and electrical and instrumentation design will resume from August.
Construction will also begin this month with limited groundwork and foundations preparation on this pre-developed site.
In-situ fabrication of flowlines will start in September as well as installation of the ground flare.
Other production equipment will be connected as individual skid packages arrive from the fabricators.
PERMITS
Angus added that permitting and planning was well advanced.
The company’s statutory Safety Case and Major Accident Prevention Document are in advanced stages of review by HSE.
The process plant will be dealt with by continuous assessment by local HSE field officers.
Angus said it was in continuous engagement with the Environment Agency regarding the process plant.
All local authority planning permissions for both process plant and pipeline are in place and Oil & Gas Authority has approved the field development plan.
SF7V SIDE-TRACK
The rig tender and selection is already complete with tenders for associated equipment expected in the coming week.
Mobilisation of the rig is expected for the first week in October.
Angus said that should suppliers indicate potential delays, it would consider deferring the side track until end of March 2022 if those delays caused consequent delay to commissioning of the process plant.
“This would be to ensure that Angus and partners benefit from the very tight pricing environment indicated by UK National Balancing Point forward gas prices for January, February and March 2022,” said the company.
The company received local authority planning approval last week and an initial presentation has been made to HSE.
BSOR [ Borehole Sites and Operations Regulations] application to HSE will be made in mid-August.
Angus said it understood that the operation could be conducted under the company’s existing Environment Agency permit for this site.
REPROCESSING
The reprocessing project used up-to-date techniques to improve the “geological interpretability” of the dataset.
“The final deliverable was a depth model validated by the fields well data,” said Angus.
“A focused proportion of this reprocessed seismic is currently undergoing interpretation by the technical team in order to provide an accurate representation of the sub-surface to aid in the successful design and drilling of the SF7V side-track.”
Results will be announced when available.
FUTURE WORK
Angus said that over subsequent months a more complete re-interpretation would take place over the whole field particularly over the southern satellite reservoir.
This aimed to shape a field development programme to convert some of the 12 BCF of 1C (the low estimate of) contingent resources into 1P (P90 or proven) reserves to supplement the existing 18 BCF of 1P reserves from the main Westphalian reservoir.