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Line 78: + + + − + − − [[file:formation-fluid-pressure-and-its-application_fig5-5.png|thumb|{{figure number|5-5}}. Copyright: Schlumberger.]]
Formation water density (view source)
Revision as of 20:05, 5 February 2014
, 20:05, 5 February 2014→Determine NaCl concentration from rw
==Determine NaCl concentration from r<sub>w</sub>==
==Determine NaCl concentration from r<sub>w</sub>==
[[file:formation-fluid-pressure-and-its-application_fig5-5.png|thumb|{{figure number|1}}. Copyright: Schlumberger.]]
The predominant solute in most formation water is sodium chloride (NaCl). Its concentration determines formation water density and R<sub>w</sub>. When only R<sub>w</sub> is available, we can use NaCl concentration to determine density.
The predominant solute in most formation water is sodium chloride (NaCl). Its concentration determines formation water density and R<sub>w</sub>. When only R<sub>w</sub> is available, we can use NaCl concentration to determine density.
Use Figure 5-5 below to determine NaCl concentration. At the intersection of formation temperature (from Y-axis) and R<sub>w</sub> (from X-axis), find the NaCl concentration (in ppm) by reading diagonal line labels and interpolating.
Use [[:file:formation-fluid-pressure-and-its-application_fig5-5.png|Figure 1]] to determine NaCl concentration. At the intersection of formation temperature (from Y-axis) and R<sub>w</sub> (from X-axis), find the NaCl concentration (in ppm) by reading diagonal line labels and interpolating.
==Estimate density==
==Estimate density==