A method for monitoring a borehole integrity by monitoring a support material introduced into the borehole and/or an introduced device using at least one fiber optic measuring cable comprising the following steps: a) inserting the at least one fiber optic measuring cable into the borehole and connecting the logging cable to the support material and/or the device so that there is physical and/or mechanical contact between the logging cable and the supporting material and/or the device b) carrying out vibration and/or strain measurements within the borehole, wherein a time series of a strain and/or a change in strain of at least one area of the fiber-optic measuring cable is used as the measurement signal for determining a strain and/or a change in strain of the supporting material surrounding the fiber optic measuring cable in this area and/or the device surrounding the fiber optic measuring cable in this area; c) analyzing strain amplitudes and/or a strain amplitude distribution by time series comparisons for different areas and/or different times in order to determine an at least regionally spatially resolved and/or time-resolved distribution of information about the state of the support material and/or the device characterized in that as distribution of the information on the condition, a distribution of information about an acoustic impedance and/or about a mechanical coupling of support material, device and/or borehole environment is used in order to determine areas in the borehole where there is an increased probability for an occurrence of material fatigue of the support material and/or the device, wherein an average noise amplitude is analyzed and/or resonance frequencies are evaluated, wherein a superposition of acoustic impedance and mechanical coupling determine the noise amplitude and/or resonance frequencies, wherein the information about the acoustic impedance and/or about a mechanical coupling is determined by comparing measured strain amplitudes of different areas and/or times with a reference measurement, wherein the reference measurement comprises one or more measurements under known conditions and is used as a calibration method. a) inserting the at least one fiber optic measuring cable into the borehole and connecting the logging cable to the support material and/or the device so that there is physical and/or mechanical contact between the logging cable and the supporting material and/or the device b) carrying out vibration and/or strain measurements within the borehole, wherein a time series of a strain and/or a change in strain of at least one area of the fiber-optic measuring cable is used as the measurement signal for determining a strain and/or a change in strain of the supporting material surrounding the fiber optic measuring cable in this area and/or the device surrounding the fiber optic measuring cable in this area; c) analyzing strain amplitudes and/or a strain amplitude distribution by time series comparisons for different areas and/or different times in order to determine an at least regionally spatially resolved and/or time-resolved distribution of information about the state of the support material and/or the device as distribution of the information on the condition, a distribution of information about an acoustic impedance and/or about a mechanical coupling of support material, device and/or borehole environment is used in order to determine areas in the borehole where there is an increased probability for an occurrence of material fatigue of the support material and/or the device, wherein an average noise amplitude is analyzed and/or resonance frequencies are evaluated, wherein a superposition of acoustic impedance and mechanical coupling determine the noise amplitude and/or resonance frequencies, wherein the information about the acoustic impedance and/or about a mechanical coupling is determined by comparing measured strain amplitudes of different areas and/or times with a reference measurement, wherein the reference measurement comprises one or more measurements under known conditions and is used as a calibration method.