Buru expected to announce a comprehensive report on Ungani-4 but still hasn't managed to obtain wireline logs due to the shale section immediately above the Ungani reservoir bridging off.
The company partly attributed this to the length of time the hole has been open while the wireline unit was repaired on Friday after mechanical issues with the contractor's unit, during which time an extended cleanout trip of the well was done to try to ensure the hole was stabilised for the logging and completion operation.
The wireline unit was put back in service on Saturday, but Buru said this morning that the additional equipment needed to obtain logs in that type of situation, and to ensure the completion could be run through the shale section without incident, is not currently available on site.
So rather than just sit and wait for the addition equipment to be sourced to ensure Ungani-4 can be successfully logged and completed, Buru has temporarily suspended the well and moved the DDGT1 rig on to drill Ungani-5 as planned.
Buru announced last week that Ungani-4 had encountered the Ungani Dolomite reservoir at 2137m and that, importantly, the top of the reservoir appears to be more than 60m as opposed to the 58m oil column in Ungani 1ST1 and 54m in Ungani-2, though Buru executive chairman Eric Streitberg said 60m could be a conservative number.
That optimism has prompted Buru to announce it would start building the flowline from Ungani-4 back to the production facility once it receives regulatory approvals so that when the well is finally completed it will be able to be brought onto production quickly.
Though Buru said it would need to review the logging and completion programs for Ungani-5, Streitberg told Energy News this morning that there were no real concerns with that well, rather it was a precautionary measure.
Buru is also reasonably optimistic because the Ungani Far West 1 well had a similar geological section and casing configuration, and the logging and completion of that well was "trouble free".
"That's unfortunately the way the business works sometimes; but we know we've got a good oil column, we're at the reservoir; we've just got to be a bit more innovative about how we complete the well," Streitberg said.
"We weren't able to get the logs in past the shale section, which is a reasonably common problem, so to do that we'll have to get the logs on drill pipe rather than on wireline.
While Buru has no line of sight as to when that logging data will come in, Streitberg said Ungani-4 "looks pretty positive from what we've seen so far".
Buru was trading down by 3.2% this morning to 30c.
