Karoon Gas Australia has announced that the Levitt-1 exploration well, in WA-482-P Carnarvon Basin, offshore Western Australia, is expected to reach total depth during early August.
Karoon has a material 50% equity interest in WA-482-P and is carried for 90% of the cost of the well. Joint venture partner, and operator Quadrant Energy Australia Ltd has the remaining 50% interest.
According to Karoon, as at 0600 WST on July 20, 2015, the Levitt-1 exploration well was drilling ahead in the 12-1/4” hole section at a depth of 2,918 mRT. The 17-1/2” hole section was drilled to a depth of 2,099 mRT where the 13-5/8” casing was run and cemented in place at 2,094 mRT.
The company adds that Blowout Preventer installation and testing was then completed, the casing shoe drilled out and drilling ahead started in the 12-1/4” hole section.
The Ocean America semi-submersible drilling rig is being used to drill the well which is targeting a net unrisked prospective resource best estimate of 110mmbbls (gross 220mmbbls).
Karoon says that Levitt-1 is designed to test the presence of a working petroleum system generating from the Wigmore sub-basin. The sub-basin contains a significant thickness of Jurassic source rocks of the same age as those known to charge petroleum accumulations elsewhere in the Basin, the company says.
The well is located to evaluate the deeper North Rankin and the shallower Legendre formations which are expected to receive hydrocarbons migrating from the oil mature source kitchen. Karoon emphasizes that a successful result would open up a new exploration play in the Carnarvon Basin.