Direct Detection of Water Flow Behind Pipe Using a Transient Oxygen activation Technique


Gordon Uswak, Ed Howes, Schlumberger


An indirect approach to determine if a formation is hydraulically isolated employs the Cement Bond or other acoustic logs to analyze the cement sheath. An alternate route to evaluate hydraulic isolation is to detect fluid movement directly. A new cased hole wireline service, the Water Flow Log (WFL*) detects induced radioactive water in the flow-channel to determine the axial movement of fluids near the well-bore.