Denison Trough

Location

The Denison Trough is located on the western limb of the Bowen Basin in the Springsure/Injune area north of Roma. It comprises PLs 41, 42, 43, 44, 45, 54, 67, 173, 183, 218 and ATPs 337P and 553P. The Denison Trough is 520 kilometres north-west of Brisbane and 230 kilometres north of Roma. Area of permits is approximately 7,400 square kilometres.

Participants

Santos – 50% (Exploration Operator)
Origin – 50% (Production Operator)

Discovered

Initial Denison Trough exploration commenced during the 1960s resulting in the discovery of six fields: Arcturus, Rolleston, Westgrove, Glentulloch, Kildare, and Warrinilla.

First Production

Production commenced in 1989.

Cost to Develop

Total Santos investment to date is $80.6 million. Santos share as at December 2005 was $40.3 million.

Facility Details

Thirteen gas fields have been discovered in the Denison Trough with more than 50 wells on production. Several gas processing and separation facilities are located in the Denison. The Rolleston gas plant, located in the northern Denison connects the Turkey Creek, Springton, Moorooloo, Arcturus, Yandina and Rolleston fields.

Further south, the Yellowbank plant connects the Glentulloch, Merivale, Springvale/Myrtleville and Yellowbank fields. Due to higher carbon dioxide levels encountered in southern Denison fields, gas is processed at Yellowbank through Australia’s first carbon dioxide membrane gas plant before being delivered to gas customers.