The operator of the Otway Basin Joint Venture, Otway Energy, has suggested that the drilling of the Nangwarry-1 nicely has resulted in a brand new area fuel discovery, with the nicely at present being cased for additional analysis and testing. The nicely was drilled to complete depth at a measured depth of four,300 metres within the Pretty Hill Formation on 31 December 2019. This is the third successive discovery inside this area over the previous two years. A reinvigoration of the Penola Trough is underway with discoveries now at Nangwarry-1, Haselgrove-Three ST1 (Beach Energy Ltd) and Dombey-1 DW1 (Beach/Cooper Energy Ltd). These wells vindicate the potential of this a part of the onshore Otway Basin, each in South Australia in addition to the bigger licence space held by Vintage in Victoria. A gross fuel column of not less than 65 metres has now been confirmed within the prime of the Pretty Hill Sandstone by log evaluation, strain knowledge and fuel sampling. Because of difficult down-hole circumstances, log knowledge obtained beneath this zone is of inadequate high quality to resolve the presence of hydrocarbons within the mid-Pretty Hill Sandstone. Gas reveals encountered throughout drilling of this part, nonetheless, have offered encouragement. Accordingly, the operator has suggested that analysis of this sandstone will happen after casing is in place. Vintage will replace the market with plans to additional outline and manufacturing check the reservoir sections as soon as these have been agreed by the Joint Venture. Preliminary evaluation of fuel samples in a single day indicated the presence of CO2 in quantities as much as round 45%. However, ambiguity exists on the evaluation on the rig website and the samples are being despatched for rigorous laboratory testing. Vintage notes there have traditionally been profitable business developments of fields with related CO2 content material, such because the Ladbroke Grove Field within the Penola Trough. The market can be knowledgeable of further outcomes after completion of the laboratory testing. Neil Gibbins, Vintage Managing Director, mentioned “The fuel discovery at Nangwarry-1 continues the latest exploration success seen within the Penola Trough. It is pleasant that the choice standards utilized by Vintage to accumulate property has once more been vindicated with the corporate now assessing potential fuel initiatives in three basins, these being the Galilee, Otway and Cooper/Eromanga.”
The Otway Basin is roughly 500km lengthy from Cape Jaffa in South Australia to north-west Tasmania, masking each onshore and offshore.
(Source and picture: Otway Energy/rig website in Haselgrove, Otway Basin)

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