Packer-Packer Vertical Interference Testing

摘要

A downhole tool having multiple packers and a controller operable to operate the packers to establish upper, middle, and lower intervals. The controller then establishes the upper and lower intervals at formation pressure, and establishes the middle interval at hydrostatic pressure. The controller then creates a pressure signal in one of the upper and lower intervals and then records a resulting pressure transient in both of the upper and lower intervals. The controller is also operable to establish the middle interval at formation pressure and establish the upper and lower intervals at below hydrostatic pressure but above formation pressure, and then create the pressure signal in the middle interval and subsequently record a resulting pressure transient in the middle interval.

主权项

1. A method, comprising:
positioning a downhole tool within a wellbore that extends into a subterranean formation, wherein the downhole tool comprises a plurality of packers, the wellbore comprises wellbore fluid at hydrostatic pressure, and the subterranean formation comprises formation fluid at formation pressure; operating the plurality of packers to establish a plurality of annular intervals within the wellbore, wherein the plurality of annular intervals comprises an upper interval, a lower interval, and a middle interval interposing the upper and lower intervals; and operating the downhole tool to:
establish the upper and lower intervals at formation pressure and establish the middle interval at hydrostatic pressure; and thencreate a pressure signal in one of the upper and lower intervals and then record a resulting pressure transient in both of the upper and lower intervals.