Systems and methods for downhole fluid typing with pulsed neutron logging

A system comprising:

• a downhole tool comprising a neutron source and at least one gamma detector;
• gamma count rates produced due to gamma arrivals at the at least one gamma detector;
• a processor coupled to a memory, wherein the memory stores a program that, when executed by the processor, causes the processor to:
• obtain at least one capture gamma count rate for a particular borehole depth;
• calculate a fluid type indicative response value based on the at least one capture gamma count rate for the particular borehole depth;
• and
• determine at least one fluid type based on the response value for the particular borehole depth.

A non-transitory computer-readable storage media storing a program that, when executed by a processor, causes the processor to:

• obtain at least one capture gamma count rate for a particular borehole depth;
• calculate a fluid type indicative response value based on the at least one capture gamma count rate for the particular borehole depth;
• and
• determine at least one fluid type based on the response value for the particular borehole depth.