Beach Energy Ltd. provided Tuesday an update on the Nappamerri Trough Natural Gas (NTNG) program in ATP 855 in Queensland and PRLs 33-49 (ex-PEL 218) in South Australia. A total of 18 wells have been drilled as part of the Stage 1 exploration phase, of which 14 have been fracture stimulated and 11 flow tested to date. A targeted campaign of fracture stimulation was undertaken to increase the understanding and knowledge of the geology and optimal approach for gas extraction. As such, flow rates to date should be assessed in this context and are not representative of whole-of-well rates expected from an entire commercially producing well. We are encouraged by test results for the Stage 1 exploration phase and the program remains on track to achieve reported milestones.
(Beach 46.9 percent and operator, Icon Energy Ltd 35.1 percent and Chevron Exploration 1 Pty Ltd 18 percent)
The current fracture stimulation program is expected to be completed in the coming weeks with the Condor Energy Services spread currently working at Geoffrey-1, the final Stage 1 well in Queensland. Hervey-1 and Etty-1 were completed and are currently being flow tested, with the snubbing unit installing production tubing in readiness for flow testing at Redland-1.
Hervey-1 was the first well to be stimulated with the new Condor fracture stimulation spread. A total of five stages were placed, with one in the Patchawarra Formation, one in the Daralingie Formation and three in the Toolachee Formation. The well was opened to flow Oct. 22 and produced at approximately 0.4 MMscf/d at a wellhead pressure of 50 psi, with fracture stimulation fluids still being recovered. Flow was initially restricted to a 22/64 inch choke and is currently choked to 40/64 inch and flowing at 0.2 MMscf/d. Hervey-1 was drilled to test the limits of the shallower zones in the Nappamerri Trough as part of the basin centred gas play. Results from Hervey-1 to date support the working hypothesis that these shallower zones are not as over-pressured in this south easterly part of ATP 855. The gas component parts for Hervey-1 were estimated at approximately 69 percent methane and 31 percent CO2.
Etty-1, located approximately 6.21 miles (10 kilometers) to the east of the successful Halifax-1 well, was stimulated over four intervals, one in the Daralingie Formation and three in the Toolachee Formation. The well was opened to flow Oct. 28 and has cleaned up from an initial rate of 0.4 MMscf/d to more than 0.87 MMscf/d at the current wellhead pressure of 570 psi. The well is beginning to stabilize and continues to recover injected stimulation fluids, with minimal decrease in pressure. Gas analysis from Etty-1 indicates approximately 68 percent methane and 32 percent CO2.
The flow rate at Etty-1 is currently restricted through a 22/64 inch choke. This choke setting is part of the reservoir management approach adopted for the majority of wells in the program to date. It appears the flow from Etty-1 is being generated primarily from the Daralingie Formation, which is encouraging for this zone as a potential priority target for further appraisal. We are encouraged that the pressure levels in Etty-1 remain high, with the well likely to be flow tested for a further 12-16 weeks before being shut-in for a pressure test.
At Redland-1, located in the northern part of the permit, fracture stimulation activities were recently undertaken with three stages successfully completed in the Toolachee Formation. The snubbing unit is now on location and preparing to complete the well.
View Full Article
WHAT DO YOU THINK?
Click on the button below to add a comment.
Generated by readers, the comments included herein do not reflect the views and opinions of Rigzone. All comments are subject to editorial review. Off-topic, inappropriate or insulting comments will be removed.
Most Popular Articles
From the Career Center
Jobs that may interest you