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Carnarvon Petroleum provides Dorado-1 drilling update

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Oilfield Technology,

Carnarvon Petroleum Limited has provided the following update on the drilling of the Dorado-1 well.


The 9 5/8 in. liner has been set and cemented in place down to around 3637 m Measured Depth (MD). Some additional time was required to set the 9 5/8 in. liner, however this has been completed in line with the well design.

Current Operations

The rig is currently drilling ahead in 8 1/2 in. hole at around 3640 m MD.

Forward Plan

Drill the 8 1/2 in. hole from 3640 m MD to approximately 4050 m MD and then, in the event of encountering a significant hydrocarbon column, wireline log the expected reservoir section including formation and pressure testing. The Caley Member is anticipated to be encountered in this section of the well. The well will further be deepened to evaluate the targets of the Milne and Crespin Members below the Caley Member.

Well Objective

The primary objective for the Dorado-1 well is to assess the gas and liquids potential in the Caley Member with the well being less than 20 km from and updip of the successful Roc-1 and Roc-2 wells. The Dorado structure at the Caley interval is estimated to contain a gross mean recoverable prospective resource of 545 billion ft3 of gas and 30 million bbls of associated condensate (being 125 million boe), gross, Pmean). Multiple secondary targets have been identified by Carnarvon in the Crespin and Milne Members and these will also be assessed by the Dorado-1 exploration well.

Prospective Resources are the estimated quantities of petroleum that may potentially be recovered by the application of a future development project and may relate to undiscovered accumulations. These prospective resource estimates have an associated risk of discovery and risk of development. Further exploration and appraisal is required to determine the existence of a significant quantity of potentially moveable hydrocarbons.

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