Salt: Nedmag TR-9 workover 2021

Salt well TR-9 workover

Start Engineering: October 2021
End execution: December 2021

Objective: Re-complete well

Depth (MD): 2451m
Depth (TVD): 1812m

Client: Nedmag BV
Location: WHC-2 / Tripscompagnie
Wells: TR-9
Start Engineering: October 2021
End Execution: December 2021
Objective: Re-complete well
Depths (MD): 2451m
Depths (TVD): 1812m
Role of WEP: WEP provided project planning, tendering engineering, coordination, management and supervision for the project while other companies provided materials and services.
Challenges: Retrieve the old 7.5/8" completion to surface.

Project description

The objective of the workover operations was to remove the existing damaged completion strings.

The most challenging string was the 7 x  7 5/8″, in which setting and retrieving plugs took more time than expected due to debris in the casing. On the other hand, the string was stuck in the cavern; thus, several attempts to cut the string were required before it was successfully retrieved.

Then the new dual concentric completion was installed that allows simultaneous injection and production operations in the well. This was accomplished by running the  7” injection string; in particular, with a sacrificial drill-in BHA, followed by installing / drilling-in the 5” x 3 ½” production string and finally installing the 2 ⅞” dilution string.

The project was finished with zero HSE-related non-conformities.

The HWU on the wellhead of TR-9 The wellhead after completion of the project