As the demand for petroleum and other strategic minerals
intensifies, there has been a corresponding need for more
accurate / realistic micro-geophysical models that govern
acoustic, electromagnetic, and nuclear measurements made
in petroleum reservoirs and commercial mineral deposits.

The main goal of these efforts is to improve the measurement
accuracy of the petroleum/mineral content of these natural
structures.

Exploration of Earth, its moon, and Mars for these petroleum
and strategic mineral deposits is accomplished in part through
the use of nuclear technology in the form of remote sensing
devices that utilize high energy neutrons and gamma rays.
These very penetrating nuclear particles and rays are injected
into porous media where they propagate and subsequently
acquire spatial, temporal, and energy features that can be
measured and then used by experts to determine some of the
physical properties of these porous media.

For example, total fluid content (porosity) and fluid fractional
volumes (oil/gas/water saturations) of earth formations are
routinely determined by oilfield service companies like
Schlumberger and Halliburton with their nuclear probes called
sondes or logging tools. In favorable cases, specific elements
may be determined, such as carbon, calcium, iron, oxygen,
sulfur, silicon; nickel and manganese; or aluminum, as in
bauxite or certain clay minerals.

Nuclear micro-geophysical models govern the propagation of
neutrons and gamma rays in such porous media. These
models have generally assumed infinitesimal pore sizes with
no laminations. However, many commercially successful
petroleum reservoirs contain vuggy porous systems with finite
pore sizes and laminated beds with alternating fluid and
mineral content.

This website describes major advances in nuclear micro-
geophysical modeling in thinly laminated media and vuggy
porous media, both with finite pore sizes. The impact of pore
size on fast neutron, thermal neutron, and gamma ray
measurements (including bulk density) is provided.

Recently, Doctor Neutron successfully added FRACTAL
DIMENSION to his model: pores are now permitted to have
radii distributed from a maximum value (Rmax) down to a
minimum value (Rmin), with a self-similar pore size
distribution governed by a single fractal dimension (D).