Abstract
In the present work, a boron lining is added to a NaI detector assembly to study the possibility of combining both the C/O tool and the thermal neutron porosity tool in one tool, both of which are commonly used tools in oil well logging. The combined tool proposed in this paper was modeled with the general purpose Monte Carlo N-particle (MCNP) transport code. The simulation results show a good porosity sensitivity (especially to low porosity values). The results also show a great reduction in the neutron flux incident on the detectors and consequently the reduction of detector activation by thermal neutrons.
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