If pressure bleeds off there is clearly a problem with the pressureintegrity of the shoe, However, industry practice dictates that a positive test, that is no pressure drop, is not diagnostic, simply because the reservoir pressure is sufficient to retain the pressure being applied.
The purpose of the well is to determine the structural status of the cavern as well as the pressure of any gas that might be inside of it, he said, adding that the last mechanical integritytest performed on the cavern was done in late 2010.