PETROPHYSICAL INTERPRETATION
   
SINGLE WELL OR FIELD STUDIES

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Data edit and depth matching

  • Depth matching of curves to primary log
  • SP baseline correction
  • Merging/Splicing
  • Filter or smooth log curves
  • Construction of Temp. curve and differential caliper

Calculation of porosity and clay volume

  • Calculate clay volume using appropriate model for each zone
  • Calculate lithology corrected porosity curves
  • Calculate cross-plot porosity and "PHIE"
   

Environmental corrections for standard log curves

  • GR, NPHI, RHOB environmental correction
  • "Tornado chart" resistivity correction

Sw and other volumetric calculation
 

  • Select appropriate Sw model
  • Calculate gross, net, pay , N/G ratio, PHIE, average   PHIE, Sw, average
  • Sw, Phi-h, BVW, and HPV
   

Log normalization

  • Well/Field histograms for GR, RHOB, NPHI, DT, and Resistivity
  • Well/Field cross-plots for available porosity and resistivity data
  • Cross-plot and curve fit for core "P&P" and core/log Phi data

Summation reports

  • Input client defined formation tops and bottoms
  • Sensitivity analysis, select "cutoffs" for Vshale, PHIE,  and Sw
  • Spreadsheet summarize results by well and formation
   

Derivation of petrophysical parameters and "Rw"

  • Pickett plots for each zone to determine a, m, n, and Rw
  • Compute "Rwa" and Rw from the SP to verify Pickett plots

Deliverables

  • Color hard copy logs/pertinent cross-plots
  • Hard copy and digital summation spreadsheets
  • Original input and computed data on client specified media and format
  • Color hard copy or pertinent cross-plots and graphs
  • A written report summarizing methods, assumptions, parameters, and results
  • Summation spread sheets by well and formation
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