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Line 110: − + − [[file:log-analysis-applications_fig5.png|300px|thumb|{{figure number|5}}A Pickett plot allow users to interactively draw a line intersecting water wet points (''S''<sub>w</sub> = 100%). This line identifies the cementation exponent (''m'') and the product of a × ''R''<sub>''w''</sub> (empirical constant × formation water resistivity) and relates water saturation (''S''<sub>w</sub>) to porosity and true resistivity.]]+ + + − − [[file:log-analysis-applications_fig6.png|300px|thumb|{{figure number|6}}Dual plot contains crosspiot (featuring data isolator polygon) and traceplot. User interactively draws polygon on the screen, which identifies the enclosed data in the database. Corresponding depths are immediately marked on the traceplot, in this case with tic marks.]] −
→Crossplots
===Crossplots===
===Crossplots===
<gallery mode=packed heights=200px widths=200px>
log-analysis-applications_fig5.png|{{figure number|5}}A Pickett plot allow users to interactively draw a line intersecting water wet points (''S''<sub>w</sub> = 100%). This line identifies the cementation exponent (''m'') and the product of a × ''R''<sub>''w''</sub> (empirical constant × formation water resistivity) and relates water saturation (''S''<sub>w</sub>) to porosity and true resistivity.
log-analysis-applications_fig6.png|{{figure number|6}}Dual plot contains crosspiot (featuring data isolator polygon) and traceplot. User interactively draws polygon on the screen, which identifies the enclosed data in the database. Corresponding depths are immediately marked on the traceplot, in this case with tic marks.
</gallery>
''Crossplots'' (''XPLTs'') relate two or more different trace values to each other at the same depth, such as core [[porosity]] and bulk density. Each type of wireline tool measures a different rock property. By studying the same XPLT in many wells, distinctive data plot patterns related to these rock properties allow users to identify lithologies, porosities, parameters, and other geological and/or engineering relationships.
''Crossplots'' (''XPLTs'') relate two or more different trace values to each other at the same depth, such as core [[porosity]] and bulk density. Each type of wireline tool measures a different rock property. By studying the same XPLT in many wells, distinctive data plot patterns related to these rock properties allow users to identify lithologies, porosities, parameters, and other geological and/or engineering relationships.
Several interactive graphic XPLT techniques and other features have been developed that make crossplots even more useful and powerful:
Several interactive graphic XPLT techniques and other features have been developed that make crossplots even more useful and powerful: