A method comprising: using a measurement tool, making measurements of a pipe structure in a wellbore at a plurality of axial locations along a length of the pipe structure, generating measured responses at each of the axial locations, the pipe structure having a number of pipes around a reference axis, said measurement tool being arrangeable within the pipes and having a set of transmitters to transmit one or more electromagnetic signals in the pipe structure at a plurality of axial locations, said measurement tool having a set of receivers to receive responses in response to exciting the pipe structure with the one or more electromagnetic signals; conducting, via control circuitry, operations for each axial location of the plurality of axial locations, the operations including: calculating a first misfit between the measured responses and modeled responses obtained from a first forward model based on a first set of parameters; calculating a second misfit between the measured responses and modeled responses obtained from a second forward model based on a second set of parameters, wherein the first and second sets of parameters include one or more of a value of determined number of pipes of the pipe structure, outside diameters of the determined pipes of the pipe structure, or thicknesses of the determined pipes of the pipe structure; and calculating at least one buckling parameter of the pipe structure, via the control circuitry, using the first and second sets of parameters for the plurality of axial locations, wherein calculating the at least one buckling parameter comprises determining one or more of the presence of buckling, an amount of buckling, or a type of buckling; and storing, in a memory device, the first and second set of parameters from the operations for each axial location. using a measurement tool, making measurements of a pipe structure in a wellbore at a plurality of axial locations along a length of the pipe structure, generating measured responses at each of the axial locations, the pipe structure having a number of pipes around a reference axis, said measurement tool being arrangeable within the pipes and having a set of transmitters to transmit one or more electromagnetic signals in the pipe structure at a plurality of axial locations, said measurement tool having a set of receivers to receive responses in response to exciting the pipe structure with the one or more electromagnetic signals; conducting, via control circuitry, operations for each axial location of the plurality of axial locations, the operations including: calculating a first misfit between the measured responses and modeled responses obtained from a first forward model based on a first set of parameters; calculating a second misfit between the measured responses and modeled responses obtained from a second forward model based on a second set of parameters, wherein the first and second sets of parameters include one or more of a value of determined number of pipes of the pipe structure, outside diameters of the determined pipes of the pipe structure, or thicknesses of the determined pipes of the pipe structure; and calculating at least one buckling parameter of the pipe structure, via the control circuitry, using the first and second sets of parameters for the plurality of axial locations, wherein calculating the at least one buckling parameter comprises determining one or more of the presence of buckling, an amount of buckling, or a type of buckling; and calculating a first misfit between the measured responses and modeled responses obtained from a first forward model based on a first set of parameters; calculating a second misfit between the measured responses and modeled responses obtained from a second forward model based on a second set of parameters, wherein the first and second sets of parameters include one or more of a value of determined number of pipes of the pipe structure, outside diameters of the determined pipes of the pipe structure, or thicknesses of the determined pipes of the pipe structure; and calculating at least one buckling parameter of the pipe structure, via the control circuitry, using the first and second sets of parameters for the plurality of axial locations, wherein calculating the at least one buckling parameter comprises determining one or more of the presence of buckling, an amount of buckling, or a type of buckling; and storing, in a memory device, the first and second set of parameters from the operations for each axial location.