A gravel pack evaluation tool comprised of a low energy radiation source
and multiple directionally-collimated radiation detectors to analyze
small, azimuthal segments of a gravel pack. Methods of use are also
provided. Collimators and radiation shielding used in conjunction with
multiple detector arrays allow an azimuthal segmented view of a gravel
pack, particularly at certain defined depths into a gravel pack.
Radioactive tracers may be used in conjunction with these tools to
produce enhanced images of gravel packs and formations.