APPLICATION OF THE MULTIPHYSICAL PRINCIPLE TO THE EVALUATION OF WELL INTEGRITY IN A MULTIPLE TRAIN CONFIGURATION

摘要

The disclosure provides a well integrity monitoring tool (150) for a wellbore (101; 201), a method using a nuclear tool (156; 200; 1010) and an electromagnetic tool (EM) (152; 300). 400; 1020), for monitoring the well integrity of a wellbore having a multiple pipe configuration (140), and a well integrity monitoring system (1000). In one example, the method (1100) includes: operating a nuclear tool in the wellbore to perform a nuclear measurement at a depth of the wellbore (1110), operating an EM tool in the borehole for performing an EM measurement at the wellbore depth (1120), determining a plurality of pipe properties of the multiple pipe configuration at the depth using EM measurement (1130), the determination , using the properties of the piping, of a nuclear measurement processed from the nuclear measurement (1140), and the use of the processed nuclear measurement to determine a well material integrity at the depth and the interior of an annular space (180, 182, 184) defined by the multiple pipe configuration (1150).