Drillsearch Energy Ltd (ASX: DLS) is pleased to advise that a new wet gas discovery has been made with the Haslam-1 exploration well. Operations are currently underway to case and suspend the well for cased-hole extended production testing to further evaluate Patchawarra Formation wet gas bearing sands.
Haslam-1 was the fourth and final well in PEL 106B during this drilling campaign, with one more exploration well to be drilled in PEL 107 which will complete this phase of Western Wet Gas Fairway exploration targeting the Patchawarra and Tirrawarra Formations located on the Western Flank of the South Australian Cooper Basin. Drillsearch Energy Limited holds a 50% interest in PEL 106B and Beach Energy (ASX: BPT) as Operator holds 50%. In PEL 107 Drillsearch holds 60% and Beach as Operator holds 40%.
Conventional Wet Gas Pay Zones – The well encountered good hydrocarbon fluorescence and gas shows in sands throughout the Patchawarra Formation and Tirrawarra Sandstones. Wire line logging coupled with a formation pressure acquisition program highlighted hydrocarbon bearing zones in sands in the Lower Patchawarra. The well did encounter conventional Patchawarra wet gas sands similar to those discovered in the Middleton and Raven Field.
Successful DST Recovers Wet Gas & Liquids – Subsequently a Drill Stem Test (DST) was run over a 4.7 metre interval of the most promising hydrocarbon bearing interval of the Patchawarra between 2,628.5 to 2,633.2 metres. The DST flowed gas at a stabilised rate of 3.0 MMscfd (1/2″ choke) with subsequent pressure data indicating no evidence of depletion. The flow also delivered a significant but as yet unquantified rate of high-value gas liquids. No water was evident.
Well Cased & Suspended for Production Testing – Following the successful DST, the Joint Venture has decided to case and suspend the well and conduct cased-hole extended production testing to further evaluate the wet gas bearing zone.
The Haslam-1 exploration well is located approximately 5km west of the prolific (Santos) Raven Wet Gas Field and 4.6 km south south-west of the Middleton Wet Gas field (DLS 50% / BPT 50%). The Joint Venture sees an opportunity to combine this light oil and wet gas discovery with the Middleton-Brownlow Wet Gas field thus utilising its existing infrastructure to fast track production.
Unconventional Coring Program - In addition thick gassy Patchawarra coals and shales were also intersected. These coal sand and shale intervals demonstrated significantly elevated gas levels and a 30 metre core was acquired for gas desorption studies to determine unconventional gas reservoir potential of these zones.
The Ensign 30 rig will move south from PEL 106B to PEL 107 to drill the fifth and final well in this current Western Wet Gas Fairway campaign. The fifth well being Southend-1, is expected to spud in mid April.
Drillsearch Managing Director, Brad Lingo said “This is an extremely exciting result encountering a wet gas zone with high liquid hydrocarbon content. The close proximity of Haslam-1 to the Brownlow and Middleton wet gas fields helps build a critical mass to support an expansion of the initial wet gas pilot project which started production in early January 2012.”
Source: Drillsearch Energy
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