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PWLS for Joined and Interpreted

PWLS for Joined and Interpreted. April 2005. Shell’s Change Requests. We try to balance needs of one organization with needs of industry as a whole. General issues: Level of granularity Scope – Some of Shell’s requests are beyond current PWLS scope – These will be addressed later on.

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PWLS for Joined and Interpreted

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  1. PWLS for Joined and Interpreted April 2005

  2. Shell’s Change Requests • We try to balance needs of one organization with needs of industry as a whole. • General issues: • Level of granularity • Scope – Some of Shell’s requests are beyond current PWLS scope – These will be addressed later on. • Mnemonic spelling • We are in the process of reviewing detailed issues.

  3. PWLS Joined Curve Standards “Classification [Mnemonic] Description” • Acoustic_Slowness [AC] • Shear_Slowness [AC_SHEAR] • [AC_SHR_CAL] Calibrated Shear Acoustic Slowness • [AC_SHR_GP] Geophysical Shear Acoustic Slowness • Compressional_Slowness [AC_COMP] • [AC_CMP_CAL] Calibrated Compressional Acoustic Slowness • [AC_CMP_GP] Geophysical Compressional Acoustic Slowness • Acoustic_Impedence [AC_IMP]

  4. PWLS Joined Curve Standards “Classification [Mnemonic] Description” • Acoustic_Slowness [AC] • Shear_Slowness [AC_SHEAR] • [AC_SHR_CAL] Calibrated Shear Acoustic Slowness • [AC_SHR_GP] Geophysical Shear Acoustic Slowness • Compressional_Slowness [AC_COMP] • [AC_CMP_CAL] Calibrated Compressional Acoustic Slowness • [AC_CMP_GP] Geophysical Compressional Acoustic Slowness • Acoustic_Impedence [AC_IMP]

  5. PWLS Joined Curve Standards “Classification [Mnemonic] Description” • There are change requests for Slowness, as follows: • Shear_Slowness [DT_SHEAR] • [DT_SHR_CAL] Calibrated Shear Acoustic Slowness • [DT_SHR_GP] Geophysical Shear Acoustic Slowness • Compressional_Slowness [DT] • [DT_CAL] Calibrated Compressional Acoustic Slowness • [DT_GP] Geophysical Compressional Acoustic Slowness • Stoneley_Slowness [DT_STONE] • This would leave Acoustic_Impedence [AC_IMP] as it was.

  6. PWLS Joined Curve Standards “Classification [Mnemonic] Description” • Nominal_Borehole_Size [BIT_SIZE] • Caliper [CALI] • Bulk_Density [DEN] • [DEN_GP] Calibrated Geophysical Density • Gamma_Ray [GR] • Neutron_Porosity [NEU] • Bulk_Modulus [BULK_MOD] • Poisson_Ratio [PR] • Time [TIM_DEP] • Compressional_Shear_Velocity_Ratio [VP_VS]

  7. PWLS Joined Curve Standards “Classification [Mnemonic] Description” • {Concentrations} • Potassium_Concentration [K] • Gamma_Ray_Minus_Uranium [GRKT] • Thorium_Concentration [TH] • Uranium_Concentration [U] • Photoelectric_Factor [PEF]

  8. PWLS Joined Curve Standards “Classification [Mnemonic] Description” • {Resistivity} • Deep_Resistivity [RES_DEP] • Medium_Resistivity [RES_MED] Medium or Shallow • Micro_Resistivity [RES_MIC] • Formation_Resistivity [RT] • Flushed_Zone_Resistivity [RXO] • Spontaneous_Potential [SP]

  9. PWLS Joined Curve Standards “Classification [Mnemonic] Description” • There is a change request • For Resistivity to have separate • Medium_Resistivity [RES_MED] and • Shallow_Resistivity [RES_SHA (or SHW)]

  10. PWLS Interpreted Curve Standards “Classification [Mnemonic] Description” • Permeability [LPERM] • [LPERM_NET] Net Log-derived Permeability • Porosity [POR] • Effective_Porosity [POR_EFF] • Net Porosity [POR_NET] • Total_Porosity [POR_TOT] • Hydrocarbon_Saturation [SHYD] • Water_Saturation [SW] • Flushed_Zone_Water_Saturation [SXO]

  11. PWLS Interpreted Curve Standards “Classification [Mnemonic] Description” • There are Change Requests to: • Use PERM as mnemonic for Permeability. • Porosity • Eliminate Total Porosity (as distinct from Porosity) • Use PORE for Effective Porosity • Use PORNET for Net Porosity • Add Effective Net Porosity as PORENET (or POR_EFF_NET) • Hydrocarbon Saturation: • Add Net, Effective, Effective Net, and Flushed Zone as SHNET, SHE, SHENET, SHXO (or SH_NET, SH_EFF, SH_EFF_NET, SH_XO) • Water Saturation: • Add Net, Effective, and Effective Net as SWNET, SWE, and SWENET (or SW_NET, SW_EFF, SW_EFF_NET)

  12. PWLS Interpreted Curve Standards “Classification [Mnemonic] Description” • {Volume_Fractions} • Anhydrite_Volume_Fraction [VANHYD] • Clay_Volume_Fraction [VCLAY] • Coal_Volume_Fraction [VCOAL] • Dolomite_Volume_Fraction [VDOLO] • Halite_Volume_Fraction [VHALITE] • Limestone_Volume_Fraction [VLIME] • Sand_Volume_Fraction [VSAND] • Shale_Volume_Fraction [VSHALE]

  13. Alan DonigerPOSC Chief Technology Officer24 Greenway PlazaSuite 1000-BHouston, TX 77046-2401+1 713 267-5124 phone+1 713 784-9219 faxDoniger@POSC.orghttp://www.posc.org

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