Backgroud

Tor is a field in the southern part of the Norwegian sector in the North Sea, 13 kilometres northeast of the Ekofisk field. The water depth is 70 metres. Tor was discovered in 1970, and the plan for development and operation (PDO) was approved in 1973. The field was developed with a combined wellhead and processing facility tied-back to the Ekofisk field. Production started in 1978. Tor produced oil and gas from fractured chalk of Late Cretaceous age in the Tor Formation and of early Paleocene age in the Ekofisk Formation. There are significant remaining resources in both formations. The reservoir depth is 3,200 metres. The field was produced by natural pressure depletion. Water injection started in 1992, but was stopped after ten years due to well integrity problems. The well stream was transported by pipelines to the processing facility at the Ekofisk Centre and further to Teesside in the UK and Emden in Germany. The Tor field was shut down in 2015. According to the formal disposal resolution, the facility has to be removed by the end of 2022. A redevelopment of the field is planned. The field is mainly located in block 2/4 in production license 018, but a small part extends into block 2/5 in PL 006. The reservoir is located at a depth of about 3200 meters.

Brief Introduction

Location of oil field: North sea

Discovery year: 1970

Main supply base: Tananger

Shut down: 2015

Redevelopment: 2022

Exploration and development history:

2/5-1 well: Completed date on 22.11.1970 (wildcat)

2/4-7 well: Completed date on 08.10.1971 (appraisal)

2/4-8 well: Completed date on 29.03.1972 (appraisal)

2/5-2 well: Completed date on 20.04.1971 (appraisal)

Current rights and interests:

ConocoPhillips Skandinavia AS: Operator with 30.65799% interest

Total E&P Norge AS: 48.19879% interest

Var Energi AS: 10.81656% interest

Equinor Energy AS: 6.63922% interest

Petoro AS: 3.68744% interest

Expected workload

A redevelopment of the field is planned. ConocoPhillips' Tor 2 redevelopment will involve a tie-back to Ekofisk to help give veteran North Sea field a new lease on life. The Tor 2 redevelopment project in the south of the Norwegian North Sea is a subsea development with two templates and a subsea production system including installation of umbilical, rigid flowlines and associated subsea equipment.

Contractors involved

TechnipFMC has been awarded a significant integrated Engineering, Procurement, Construction and Installation (iEPCI) contract from ConocoPhillips for the TOR II development, located in the Norwegian sector of the North Sea at a water depth of 80 meters. This contract covers the delivery and installation of a subsea production system including installation of umbilical, rigid flowlines and associated subsea equipment.