Hydrocarbon Flows During Testing at Davenport 1 in Permit PEL 94 in SA
Strike Energy Limited reported Thursday that completion and preliminary testing operations at Davenport 1 in PEL 94 (Beach Energy Limited 50 percent (Operator), Strike 35 percent and Senex Energy Limited 15 percent) in the Southern Cooper Basin Project in South Australia have been successfully completed.
Completion, Flow Back and Testing Operations
Completion, flow back and testing operations at Davenport 1 commenced Aug. 2. A Patchawarra Vu coal zone was perforated and a small fracture stimulation treatment pumped. Coil tubing operations, including nitrogen pumping, were then undertaken to clean the wellbore and to artificially lift fluid out of the well. Encouraging hydrocarbon shows were observed via gas detector at surface throughout the duration of the nitrogen lift operations and an estimated 90 percent of the frac fluid was recovered during the flow back period.
A plug was then set and the Patchawarra Vm3 coal perforated. Based on the analysis of the data from the lower zone, the joint venture decided to proceed with flow testing of this zone without fracture stimulation using coiled tubing and nitrogen lift. Encouraging hydrocarbon shows were again observed at surface throughout the duration of the nitrogen lift operation.
The well is currently shut in for ongoing pressure observation pending further testing activities.
Observations and Next Steps
Analysis of the Davenport 1 pre‐fracture stimulation diagnostic fracture injection test (DFIT) indicate that the permeability of the Patchawarra Vu coal seams is broadly similar to that observed in Strike’s Le Chiffre 1 and Klebb 1 wells. Subsequent fracture stimulation and flow back of this interval has confirmed the permeability interpreted from the DFIT.
The Davenport 1 Vm3 coal DFIT, and analysis of subsequent flow test data, indicates that the Vm3 seam has similar permeability to the underlying Vu coals.
The PEL 94 Joint Venture plans to install a pump and continue testing the un‐stimulated Vm3 coal as a single zone test to build on the encouraging results obtained to date. The unstimulated Vm3 completion is designed to minimize the volume of any formation fluid produced ahead of gas desorption.
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