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Line 103:
Line 103: − # Use the table below to determine how to enter a neutron porosity value.+ Line 112:
Line 112: − # Use the table below to determine how to enter a density porosity value+ Line 121:
Line 121: − # Use the table below to determine formation lithology and porosity.+
Density-neutron log porosity (view source)
Revision as of 18:10, 20 October 2014
, 18:10, 20 October 2014→Using a density–neutron crossplot
To determine lithology or correct porosities for lithologic or gas effects from a density–neutron crossplot, follow the steps listed below.
To determine lithology or correct porosities for lithologic or gas effects from a density–neutron crossplot, follow the steps listed below.
: 1. Use the table below to determine how to enter a neutron porosity value.
{| class = "wikitable"
{| class = "wikitable"
|-
|-
| Neutron porosity is in sandstone or dolomite units || Enter the chart on the sandstone or dolomite line. Project up or down to a density value.
| Neutron porosity is in sandstone or dolomite units || Enter the chart on the sandstone or dolomite line. Project up or down to a density value.
|}
|}
: 2. Use the table below to determine how to enter a density porosity value
{| class = "wikitable"
{| class = "wikitable"
|-
|-
| Density log scale is bulk density || Enter the y-axis with the log bulk density value and intercept the neutron projection.
| Density log scale is bulk density || Enter the y-axis with the log bulk density value and intercept the neutron projection.
|}
|}
: 3. Use the table below to determine formation lithology and porosity.
{| class = "wikitable"
{| class = "wikitable"
|-
|-