document: Quadrant Energy Pty Ltd, via subsidiary company, Quadrant Northwest Pty Ltd, spudded the Dorado 1 wet gas exploration well in WA-437-P, located in the Bedout Sub-basin, around 5 June 2018. On 24 July 2018 joint venture partner Carnarvon Petroleum reported that wireline logging and evaluation had been completed, with oil confirmed in the Caley Member, and in addition gas and condensate confirmed in the upper Baxter Member. A 7â liner is now being set, in preparation to drill through the deeper Crespin and Milne members.  Carnarvon reported that an âexcellent reservoirâ unit had been encountered within the Caley target, with 79.6 m net pay over a 96.1 m gross interval within the unit.Â  Average porosity of 20%, with 82.5% hydrocarbon saturation and permeability between 100 and 1,000 mD has been measured within the Caley.Â  Light oil has also been recovered to surface as part of the logging and evaluation programme, estimated at 49.6Âº API.  In addition, gas and condensate samples were acquired from the top Baxter unit during the intermediate testing. A total 10.5 m net pay, across a 21 m gross interval, has been estimated. Pressure data acquired has indicated separate hydrocarbon columns within the two units.Â  However additional information would be required on the Baxter to determine its characteristics, as it was not completely drilled through in the Dorado 1 well.  Further drilling, into the Baxter, Crespin and Milne Member units is now planned, to evaluate the secondary targets.Â  It is reported that all sands to date are observed to be hydrocarbon charged, with no water saturated sands yet encountered. The forward plan is now to drill through the secondary targets, to a planned total depth of 4,550 m. Fluid sampling and pressure testing is planned once total depth is achieved. Once drilling and evaluation is fully complete, the joint venture plan to offer revised resources estimates  Wireline logging was undertaken after the operator drilled the 8-1/2â hole to a depth of approximately 4,044 m. The significance of gas indications observed from cuttings and while logging during drilling warranted the wireline logging programme to be brought forward, having originally been planned on achieving total depth.   Previously, in June 2018, Carnarvon reported that elevated gas readings had been observed within a number of Caley Sandstone intervals between 3,853 and 3,947 m. Oil shows were also encountered in the Hove Member.Â  Though Carnarvon reported the Hove would not be tested at this well, it may lead to targets of this interval in future wells.  The well is being drilled by the âEnsco 107â J/U rig which arrived onsite around 23 May 2018 and awaited swell conditions to subside before spudding. Â   The Dorado prospect is located in the centre of WA-437-P, approximately 17 km southwest of Roc 1, and is estimated to cost around AUD 50 million to drill. The prospect is on trend with the Phoenix, Phoenix South and Roc discoveries. Dorado 1 is targeting stacked sands within the Caley Sandstone Member of the Middle Triassic Lower Keraudren Formation as a primary objective. The trapping mechanism of the prospect relies on dip closure and the erosional truncation of the Caley and Milne members by the Dorado Canyon which was subsequently filled by shales that are juxtaposed against the target reservoirs.   Mean prospective resources have been reported by joint venture partner Carnarvon Petroleum as 545 Bcf gas and 32 MMb condensate in the Caley 1 sand and potentially 500 Bcf gas and 29 MMb condensate in sands 2 - 5 (average per sand level). The deeper Milne Sandstone Member is considered a secondary target. Carnarvon reported that total Pmean reserves have been estimated in the order of 2.5 Tcf gas and 147 MMb condensate. A discovery at Dorado could lead to a number of development scenarios for the Phoenix area fields.   The commitment to drill in WA-437-P lies in Term Six, which was suspended for 18 months from 4 February 2016 following the drilling of the Roc 1 well. The suspension was approved to allow time for the completion and interpretation of the Bilby 2D and Capreolus MC3D seismic surveys before further exploration/appraisal work was considered. Roc 2 was subsequently drilled in July 2016.  WA-437-P, which covers an area of 4,871 sq km, was awarded on 4 August 2009. Participants in the permit are: Quadrant Northwest Pty Ltd (80% + Operator) and Carnarvon Petroleum Ltd. (20%).
summary: Australia (Roebuck B.)	Dorado 1 (Quadrant 80% op, Carnarvon 20%) in WA-437-P (Greater Phoenix area), in addition to the Caley Mb light oil find, 10,5m of net g & cond. pay encountered in the Baxter Mb, good quality reservoir, though maybe a gas cap to further oil resources. Drilling ahead to 4 550m to further evaluate the Baxter sand and the secondary targets in the Crespin and Milne fms.