Compensated formation saturation using assisted physics and neural networks

A system comprising:

• one or more processors;
• and
• a computer-readable medium comprising instructions stored therein, which when executed by the one or more processors, cause the one or more processors to:
• access inelastic gamma spectrum data for an inelastic gamma spectrum generated downhole in a wellbore;
• access capture gamma spectrum data for one or more capture gamma spectrums generated downhole in the wellbore;
• and
• apply a model that accounts for holdup measurement to both the inelastic gamma spectrum data and the capture gamma spectrum data to identify a compensated oil saturation for a formation surrounding at least a portion of the wellbore based on both the inelastic gamma spectrum and the one or more capture gamma spectrums.

A gamma ray detector system comprising:

• a downhole gamma ray detector;
• and
• a processing unit configured to:
• access inelastic gamma spectrum data for an inelastic gamma spectrum generated downhole in a wellbore through the gamma ray detector;
• access capture gamma spectrum data for one or more capture gamma spectrums generated downhole in the wellbore through the gamma ray detector;
• and
• apply a model that accounts for holdup measurement to both the inelastic gamma spectrum data and the capture gamma spectrum data to identify a compensated oil saturation for a formation surrounding at least a portion of the wellbore based on both the inelastic gamma spectrum and the one or more capture gamma spectrums.