Senex Starts Fracture Stimulation Project Onshore Southern Cooper Basin

Senex Energy, the operator of the onshore PEL 115 permit, disclosed Wednesday that it has started fracture stimulation operations at the Kingston Rule-1 unconventional gas exploration well in the Southern Cooper basin.

The company has also started work over and zone perforation operations at the Hornet-1 well sited in the same permit.
The fracture stimulation program over the wells will be completed over a two-month period, with flow testing to continue into June this year.

Kingston Rule-1 was drilled by Senex late last year and intersected 174 feet (53 meters)of net gas pay, with 30 feet (nine meters) in the Epsilon Formation and 144 feet (44 meters) in the Patchawarra Formation tight gas sands. The well also intersected 492 feet (150 meters) of Murteree and Roseneath Shales. Mud logs confirmed the presence of liquid hydrocarbons throughout the Permian section.

The multi-stage fracture stimulation of Kingston Rule-1 targets tight gas sands within the Patchawarra and Epsilon formations. At present, three of a total six zones have been fracture stimulated with bridge plugs set between each zone. The forward operation will be to fracture stimulate the remaining three zones.

Hornet-1 was drilled by Victoria Petroleum in 2004 and intersected gas shows in the Epsilon Formation and 91 feet (28 meters) of net gas pay in the Patchawarra Formation. Two drill stem tests were conducted on Hornet-1 and resulted in gas flowing to surface. The multi-stage stimulation of Hornet-1 will target additional gas sands within the Patchawarra Formation.

As Hornet-1 was a pre-existing well, a work over rig was brought onto the site, to prepare the well for fracture stimulation and perforate the zones in advance of the fracture stimulation equipment arriving onsite.

"We are very pleased that the stimulation of Kingston Rule-1 has commenced and look forward to evaluating the results, along with those from Hornet-1, over the coming months. There is a lot of interest in the unconventional gas potential which is believed to exist in the Cooper Basin and we are excited to be part of it," Orca Energy's Executive Director, Greg Bandy, said in a statement.

Senex has an 80 percent interest in both of the wells, while Ocra Energy holds the remaining 20 percent stake.

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Senex Strikes Gas at Unconventional Well in Cooper Basin

Senex has intersected 384 feet (117 meters) of net gas pay following the completion of drilling and casing of the Paning-2 unconventional gas exploration well in the onshore permit PEL 90, in the northern Cooper Basin.

Paning-2 is the first unconventional gas well to be drilled in the region and has confirmed the potential of the tight sands and deep coals to host material gas volumes.

The well drilled into a 13-square mile (36-square kilometer) structure – which Senex estimates to contain 2.1 trillion cubic feet of potential gas in place – and intersected 154 feet (47 meters) of net gas pay in the Permian tight sands and 230 feet (70 meters) in the deep coals of the Patchawarra Trough.

Senex's Managing Director Ian Davies noted that the result highlighted the untapped potential of the company's interests in the northern Cooper Basin.

"Paning-2 confirms the potential of the Patchawarra Trough and the northern Cooper Basin as a new province for unconventional gas exploration. Following the success of the well, we will continue to test for similar targets across the region," Davies said in the company's disclosure.

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Senex Starts Fracture Stimulation Program Onshore Cooper Basin

Senex Energy disclosed Thursday that it has started on a large scale fracture stimulation program on its unconventional gas exploration wells in the onshore Cooper Basin, beginning with Skipton-1 in PEL 516.

The five well program aims to delineate unconventional gas resources in several Senex permits in the southern and northern South Australian Cooper Basin.

Senex has successfully drilled three new dedicated unconventional gas exploration wells in its southern permits: Skipton-1, Kingston Rule-1, and Talaq-1. A fourth well, Paning-2 in the northern Cooper Basin, has successfully been drilled and is currently being cased. Senex observed significant zones of net gas pay within all of these wells.

This program involves fracture stimulation and flow testing of these wells, along with the existing Hornet-1 well which flowed gas to surface during drilling in 2004. Senex expects this program will provide information on post-fracture production rates and detailed information to allow the refinement of fracture stimulation design within tight gas sands, shales and deep coals in the Cooper Basin.

In particular, the program seeks to determine the fracture complexity and orientation within both the primary target Patchawarra Formation sands and the secondary targets Roseneath, Epsilon and Murteree shale and tight sand package and the Toolachee and Patchawarra coals.

Senex's Managing Director Ian Davies, noted that the fracture stimulation program would provide valuable information for the appraisal and testing of its unconventional gas assets in the Cooper Basin.

"For Senex, this is another major step forward in the appraisal of our highly prospective unconventional gas assets," Davies said in a statement.

Senex expects the current program will result in the certification of material contingent resources. Measurement of gas flows from these wells will influence the design and location of pilot programs required for longer term production testing and reserves certification.

Upon completion of the Skipton-1 program, Senex will fracture stimulate Kingston Rule-1, Talaq-1, Hornet-1 and Paning-2. The fracture stimulation program will be completed over a two month period, with flow testing to continue into June this year.

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