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bed thickness effects

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DENSITY, NEUTRON & PULSED NEUTRON
MEASUREMENTS IN LAMINAE, PART I

 

This example describes oil sand and montmorillonite laminae
with these bulk properties (i.e. LVPM output values):

                    SAND          MONTMORILLONITE

 DENSITY          2.330 g/cc         2.500 g/cc
 
 DENSITY POR.     0.222              0.123
 
 NEUTRON POR.     0.277              0.079


The sand laminae had a fixed bed thickness of 10 cm and the
montmorillonite bed thickness varies from 0.01 cm to 10 cm,
with fixed pore sizes.  More details are provided below.

In all of the figures in this section, homogeneous refers to
the application of classic volumetric mixing rules governed
by bed thickness weighting for homogeneous media with
infinitesimal pore sizes.  In these same figures,
heterogeneous refers to the exclusive use of LVPM to compute
all physical properties for media with finite sand pore sizes.
(The montmorillonite has a finite pore size too, but it has
no free porosity.)  LVPM more accurately details the
propagation of neutrons and gamma rays in these heterogeneous
media.  Corrections need to be applied to the apparent
density and neutron logging values to account for finite
pore sizes and bed thickness effects.

 


Document
Laminated Bed Thickness Weighted Mixing Rules
Document
Example Specification, Results & Discussion

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