1. PWLS SIG Area of Interest –the “practical” definition, movement, and storage of E&P well log data. –This group is essentially a cross-vendor, cross-product line user community for well log data store, data conversion, and data transfer products. Players –operators, service and software providers, government agencies, consultancies, and POSC.

2. PWLS SIG Active POSC members include: –Oil companies: ExxonMobil, Shell, Hydro, Statoil –Non-profit: US DOI, Norway NPD –Commercial: Baker Hughes, Flare, Halliburton/Landmark, Oilware, Paradigm, Pathfinder, Schlumberger Other attendees included: –Oil companies: DONG (Denmark), Shell, Anadarko, BP, Burlington Resources, Oxy, Pioneer Nat. Resources –Commercial: LogTek (Norway), National Oilwell, PetroData, ROQC, Tellus Software, Adaptable Technology, DrillingInfo, GTS Geotech, Volant Solutions

3. PWLS SIG History –Evolved from PWLS project Phase 2 –PWLS Project published Version 1 standards in ’01 6 major types of acquisition well logging tools addressed 3 major service companies involved Classification –Good: based on broad taxonomy of property (measurement) types –Issue: taxonomy was proprietary –Issue: alternate classification was also adopted

4. PWLS SIG History –SIG Meetings started in ’03 More players; more oil company players Clear need to resolve classification issues Focus shifted to oil company calculated –PWLS Version 2 released in ’03 POSC now has rights to the property (measurement) type taxonomy The alternate classification was eliminated Class attributes were added to enhance searching Joined and Interpreted curve mnemonics defined Supported in PPDM V3.7 work

5. PWLS SIG History –SIG Meetings in ‘04 Log / Service Classification use by Norway’s DISKOS (SINAS) described Changes to joined and interpreted specifications proposed by Shell Interest expressed in expanding the coverage of acquisition curve types –SIG and Vendor Meetings BakerAtlas confirmed that RECALL support for PWLS will be upgraded from Version 1 to Version 2 in early ’05 –RECALL is a product in its own right and it is the also underlying engine beneath PetroBank from Landmark.

6. POSC Standards & SIGs Std/SIGWITSMLInt. Ops.DSSPWLS eRegulatory Geoshare Data Exch - WITSML - Other Practical E&P - Ref Vals - Catalog - Well Log - Other Data Mgt - Epicentre - Geoshare App Interop

7. PWLS SIG What’s Next? –Complete processing of Shell’s Change Requests –Expand Acquisition Curve Classification Coverage More types of curves Additional acquisition service companies –Improve user documentation and Web Service functionality –Continue work on Calibrated Image specifications Q1 review of initial results

8. 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.

9. 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]

10. 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] {Shell may propose [DT]} [AC_CMP_CAL] Calibrated Compressional Acoustic Slowness [AC_CMP_GP] Geophysical Compressional Acoustic Slowness –Stoneley_Slowness [AC_STONE] –Acoustic_Impedence [AC_IMP]

11. 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]

12. 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]

13. 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]

14. PWLS Joined Curve Standards “Classification [Mnemonic] Description” {Resistivity} –Deep_Resistivity [RES_DEP] –Medium_Resistivity [RES_MED] Medium or Shallow –Shallow_Resistivity [RES_SHA] {Shell may propose [SHW]} –Micro_Resistivity [RES_MIC] –Formation_Resistivity [RT] –Flushed_Zone_Resistivity [RXO] Spontaneous_Potential [SP]

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

16. PWLS Interpreted Curve Standards “Classification [Mnemonic] Description” Permeability [LPERM] {Shell may propose [PERM]} –[LPERM_NET] Net Log-derived Permeability Porosity [POR] –Effective_Porosity [POR_EFF] {Shell may propose [PORE} –[POR_NET] Net Porosity {Shell may propose [PORNET]} –Total_Porosity [POR_TOT] {Shell may propose [POR]} Hydrocarbon_Saturation [SHYD] {Shell may propose adding net, effective, effective-net, and flushed-zone} Water_Saturation [SW] –Flushed_Zone_Water_Saturation [SXO] {Shell may propose adding net, effective, and effective-net]

17. 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]

18. PWLS SIG More –Overview PresentationOverview Presentation –NPD PresentationNPD Presentation –DISKOS PresentationDISKOS Presentation –Demo PresentationDemo Presentation

19. Alan Doniger POSC Chief Technology Officer 24 Greenway Plaza Suite 1000-B Houston, TX 77046-2401 +1 713 267-5124 phone +1 713 784-9219 fax Doniger@POSC.org http://www.posc.org