Beach Energy Ltd. provided Wednesday a monthly update on operations at its upstream oil and gas projects in the Cooper Basin, Australia.
South Australian Gas
(Fixed Factor Area Joint Venture: Beach 20.21percent, Santos 66.6 percent and operator, Origin 13.19 percent)
A six‐well development campaign is underway in the Tirrawarra and Gooranie fields, located approximately 31 miles (50 kilometers) north of Moomba in the Cooper Basin, targeting gas and gas liquids in the Patchawarra Formation and oil in the Tirrawarra Sandstone. The campaign is being undertaken as a result of past drilling, which highlighted significant remaining potential within both gas and oil reservoirs, and findings from the detailed Patchawarra Formation study undertaken in 2011. Included in the program is one deep coal fracture stimulation per well, with the aim to test incremental well productivity. Tirrawarra‐87, the fifth well of the campaign, was cased and suspended following intersection of gas and oil pay in target zones which exceeded pre‐drill estimates. Gooranie‐7, the final well of the campaign, is drilling ahead.
A three‐well development campaign commenced in the Moomba South Field, which aims to develop booked reserves in the Toolachee and Daralingie formations. Wells will be drilled using underbalanced drilling (UBD) techniques, a commonly used drilling method whereby wellbore pressure is maintained below formation pressure to preserve formation integrity. UBD enables acceleration of production from highly permeable, low pressure reservoirs, and was successfully undertaken in the Moomba South Field in 2007. All wells will be drilled in a batch to the top of the Toolachee Formation and cased. Drilling through the Toolachee and Daralingie formations in each well will then be undertaken. Moomba‐210, the first well of the campaign, has been drilled to the Toolachee Formation and Moomba‐211 is drilling ahead.
A six‐well infill development campaign commenced in the Moomba North Field, which aims to develop booked reserves in the Toolachee, Daralingie and Patchawarra formations. A phased approach is being executed to develop booked reserves through 26 new wells in the area, which commenced in 2014 with the drilling of six development wells. Techniques from the 2014 campaign will be applied to the current campaign, including pad drilling, optimised well designs and improved well completions. Moomba‐203, the first well of the campaign, was cased and suspended as a future Permian gas producer following intersection of gas pay in‐line with pre‐drill estimates. Moomba‐204 is drilling ahead.
Exploration and Appraisal
ATP 924 (Beach farming‐in 45 percent with Drillsearch)
The Maroochydore‐1 exploration well is located in south‐west Queensland on the north‐eastern flank of the Cooper Basin, approximately 155 mile (250 kilometers) north‐east of Moomba. The well is situated on a large anticline and was drilled to test a northern four way closure, with the Hutton Sandstone the primary oil target and secondary targets in other Jurassic sandstones. Oil shows were seen during drilling, however wireline logs showed the Hutton Sandstone to be water saturated and the well was consequently plugged and abandoned. The well provided the joint venture with a significant amount of data which has improved its understanding of the north‐eastern flank of the Cooper Basin.
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