Australia: Tap Oil Provides Zola-1 Well Drilling Update

Tap Oil Limited  provides the following update on the Zola-1 exploration well, offshore Carnarvon Basin, Western Australia.

Location / Proposed Depth

The Zola-1 well is located in permit WA-290-P, immediately south of the giant Gorgon gas field in the Carnarvon Basin, Western Australia. The well is being drilled in 285 metres of water and the primary Mungaroo Formation target will be intersected at approximately 4,300 metres below sea level. Further secondary targets will see the well drilled to a target depth of 5,000 metres.

Progress

During the period from 06:00 hours WST on 29 December 2010 to 06:00 hours WST on 05 January 2011, Zola-1 was at a depth of 3524 metres. The 340mm (133/8”) intermediate casing was successfully pressure tested, prior to evacuating and securing the rig for an approaching cyclone. The cyclone was ultimately downgraded to a tropical depression and the rig has now been re-manned. This morning the operations were continuing focus on making the well ready for drilling out the intermediate casing shoe.

Forward Plan

Drill ahead in 311mm (121/4”) hole to the second intermediate casing point at circa 3,976 metres, where 244mm (9 5/8”) casing will be run and cemented in the hole.

Zola-1 is now expected reach the first target depth in approximately 15 days and reach a final total depth in approximately 25 day, on a trouble free basis. Upon completion of evaluation the well will be plugged and abandoned in the normal course of offshore operations.

Background

The Zola prospect is a very large Triassic tilted fault block on trend with the giant Gorgon gas field. One of the largest undrilled structural features in the Carnarvon Basin, Zola is covered by high quality newly reprocessed 3D seismic data and is considered a moderate risk prospect. Zola is estimated by Tap to contain mean recoverable gas volumes of 1.0 trillion cubic feet with upside potential for 2.0 trillion cubic feet. The well will test the gas potential of several top and intra Mungaroo Formation sands – the primary reservoir at Gorgon. In addition it is possible that some Jurassic reservoirs may be developed flanking the main Triassic structure.

Previous drilling in WA-290-P focused on the shallower Jurassic and Cretaceous interval, resulting in the Antiope gas discovery in 2000 and the minor Lauda oil discovery in 2005.

Located close to existing and developing gas infrastructure, Zola would have multiple potential development options should it be a discovery. Any development at Zola could also encompass the overlying Antiope gas discovery (estimated at ~120 Bcf).

WA-290-P Joint Venture Participants

Tap (Shelfal) Pty Ltd 10.00%

Apache Northwest Pty Ltd (Operator) 30.25%

Nippon Oil Exploration (Dampier) Pty Ltd 15.00%

OMV Australia Pty Ltd 20.00%

Santos Offshore Pty Ltd 24.75%

Source:Tap Oil, January 5, 2011;

Share this article

Follow Offshore Energy Today

One thought on “Australia: Tap Oil Provides Zola-1 Well Drilling Update”

Comments are closed.

Events>

<< Dec 2019 >>
MTWTFSS
25 26 27 28 29 30 1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31 1 2 3 4 5

Africa Oil Week 2020

For over 25 years Africa Oil Week has been the meeting place for Africa’s most senior E&P stakeholders.

read more >

CERAWeek 2020

 Each year, CERA clients gathered for a few days in Houston…

read more >

Offshore Technology Conference (OTC) 2020

The Offshore Technology Conference (OTC) showcases leading-edge technology for offshore drilling, exploration…

read more >

2020 EXPLORATION AND PRODUCTION STANDARDS CONFERENCE ON OILFIELD EQUIPMENT AND MATERIALS

The development of consensus standards is one of API’s oldest and most successful programs.

read more >

Jobs>

Looking to fill a job opening?

By advertising your job here, on the homepage of OffshoreEnergyToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply

Looking to fill a job opening?

By advertising your job here, on the homepage of OffshoreEnergyToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply