OIL

Scalybutt horizontal well to tap northern lobe of Woollybutt field

THE WA-25-L Joint Venture started drilling the Scalybutt-1H development well in the northern lobe...

The well is about 1.6km west of the Woollybutt-2AST1 production well in Western Australia's Carnarvon Basin southwest of Barrow Island.

Scalybutt-1H will be sidetracked from the previously drilled Scalybutt-1 step-out well which discovered an oil column west of the field’s previously mapped closure.

The well will be drilled as a horizontal production well and should take up to 30 days to drill and complete, according to Tap.

The company estimates that the Scalybutt-1H well has the potential to access up to 10 million bbls of recoverable oil from the northern lobe of the Woollybutt Oil Field.

“The initial results of the Scalybutt-1 well were announced in July 2004, proving a western extension of the Woollybutt Oil Field which had previously been interpreted using the 3D seismic on that part of the field,” Tap said in a statement.

“Following detailed analysis of the core, log data and detailed reservoir modelling from the initial Scalybutt-1 step out well, it is interpreted that there is recoverable oil in this part of the field not accessed by the two existing production wells. Scalybutt-1H is designed to access these additional volumes of oil.”

The partners plan to install a subsea flowline to connect Scalybutt-1H to the existing Woollybutt FPSO production facility.

The Woollybutt field is presently producing around 21,500 bopd. Scalybutt-1H is expected to begin production by around July 2005 at initial rates of around 8,000 bopd.

The Joint Venture is also in the process of planning follow-up wells to the recent successful Woollybutt-4 appraisal well in the southern lobe and considering development options for producing the southern lobe.

Following the drilling of Scalybutt-1H, the Sedco-703 semi submersible drilling rig is scheduled to move to the permit west of the Woollybutt field to drill the Maier-1 and Lauda-1 exploration wells in which Tap has a 25% interest.

WA-25-L joint venture participants are Eni Australia Limited (operator) 65%, Mobil Australia Resources Co. Pty. Ltd. 20% and Tap Oil Limited 15%.

TOPICS:

A growing series of reports, each focused on a key discussion point for the energy sector, brought to you by the Energy News Bulletin Intelligence team.

A growing series of reports, each focused on a key discussion point for the energy sector, brought to you by the Energy News Bulletin Intelligence team.

editions

ENB CCS Report 2024

ENB’s CCS Report 2024 finds that CCS could be the much-needed magic bullet for Australia’s decarbonisation drive

editions

ENB Cost Report 2023

ENB’s latest Cost Report findings provide optimism as investments in oil and gas, as well as new energy rise.

editions

ENB Future of Energy Report 2023

ENB’s inaugural Future of Energy Report details the industry outlook on the medium-to-long-term future for the sector in the Asia Pacific region.

editions

ENB Cost Report 2021

This industry-wide report aims to understand current cost levels across the energy industry