Buru has confirmed that the field has been temporarily shut-in while the trucking contractor for the transport of crude oil from the field to Wyndham Port investigates a recent truck rollover incident on the Great Northern Highway, reported by EnergyNews last week.

The company has also recently been informed that its oil charter vessel requires drydock repairs that may take up to 28 days.

Buru says Ungani production will be shut in for several weeks, with staff being redeployed to support the drilling and texting operations in the meantime.

It will work with its trucking contractor to improve safety procedures.

The shut-in will also allow the acquisition of valuable pressure build-up data from the Ungani production wells, the company said, and should not have a material effect on the company's cash positon.

Testing of the Praslin-1 Ungani dolomite oil discovery has commenced with a wireline swabbing unit, and the results could be known by the end of the week.

A successful flow at Praslin-1 would have profound consequences for the Ungani play for Buru, Mitsubishi Corporation and Rey Resources, with the Ungani Trend so far only productive at the Ungani field.

Buru says the drilling fluid lost through the drilling operation is being recovered, but it will be several more days before it can obtain a sample of reservoir fluid.

At the Laurel project a completion is being run into the Asgard-1 well to allow testing of separate zones, however fluid returns during the operations have included encouraging amounts of gas.

At Valhalla North-1 initial clean-up flows are being undertaken prior to running the completion tubing, with initial flowback showing strong flows of gas and condensate.

The well is interpreted to be producing from the top stimulation zone, with some contribution from the next lower zone.

As the well is on clean-up flow it is producing up the 7-inch casing to flare which restricts its ability to lift fluid, and significantly higher rates can be expected once the completion string has been run.

Overall gas rates and specific condensate ratios will be obtained once the well is cleaned out and the production string is run.

Initial field analysis of the gas has confirmed that it is very high quality and has no detectable CO2 content.

Buru said the Victory-1 conventional oil well, targeting a much larger Ungani-style structure than Praslin-1, should encounter and drill through the prospective Lower Carboniferous and Upper Devonian reservoirs within the next 10 days, while the DDH1 Rig-31 is being mobilised to the Senagi-1 location.

Senagi is a robust structural closure on the Ungani trend in EP458.

The well has a maximum total depth of 1200m and is following up the encouraging results encountered in a nearby mineral core hole which encountered extensive dolomitised reservoir with oil shows.

It is intended to fully core the predicted reservoir section and evaluate any hydrocarbons encountered with a production test.

Executive chairman Eric Streitberg said he was particularly excited about the early results Laurel

Formation well stimulation program.

"The initial flow results from Valhalla North of high quality gas with significant amounts of accompanying condensate are an excellent result in the context of global, and particularly Australian test results in vertical wells.

"They demonstrate the potential value of the gas resources in the basin.

"The results to date also provide additional confirmation of our interpretation that the Canning Superbasin contains a very large basin-centered gas system."

Tellingly, Streitberg did not address the Yulleroo fraccing program, which has proven to be more controversial, with a number of traditional owners protesting plans for further fraccing of the latest two wells.

Buru has independently assessed resources for the Laurel play of billions of barrels of condensate and trillions of cubic feet of gas.

Buru shares were up 5.56% to 38c this morning.