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Density-neutron log porosity (view source)
Revision as of 13:22, 12 March 2014
, 13:22, 12 March 2014→Using a density–neutron crossplot
{| class = "wikitable"
{| class = "wikitable"
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! If… || Then…
! width="100pt" | If… || width="400pt" | Then…
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| Neutron porosity is in limestone units || Enter the chart along the x-axis with neutron porosity. Project up to density porosity.
| Neutron porosity is in limestone units || Enter the chart along the x-axis with neutron porosity. Project up to density porosity.
{| class = "wikitable"
{| class = "wikitable"
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! If… || Then…
! width="100pt" | If… || width="400pt" | Then…
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| Density log porosity is in sandstone, limestone or dolomite units || Find the density log percent porosity value on the diagonal line that matches the lithologic units recorded on the log (i.e., use the sandstone line if the log was recorded in sandstone units). Move left or right to intercept the neutron projection.
| Density log porosity is in sandstone, limestone or dolomite units || Find the density log percent porosity value on the diagonal line that matches the lithologic units recorded on the log (i.e., use the sandstone line if the log was recorded in sandstone units). Move left or right to intercept the neutron projection.
{| class = "wikitable"
{| class = "wikitable"
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|-
! If… || Then…
! width="100pt" | If… || width="400pt" | Then…
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| Point falls on a diagonal line || The point defines the lithology of the formation by which line it falls on and the porosity is the value marked on the line at that point.
| Point falls on a diagonal line || The point defines the lithology of the formation by which line it falls on and the porosity is the value marked on the line at that point.