© copyright 2006 posc pwls update aberdeen, scotland june 21, 2006

© Copyright 2006 POSC

PWLS Update

Aberdeen, Scotland June 21, 2006


PWLS

• A set of industry-standard dictionaries– curve classes, tool classes, property

types, ...• A set of dictionaries of company-defined

mnemonics– services, tools, channels, ...– classified by reference to industry

standard dictionary entries


PWLS Website

• http://w3.posc.org/pwls• your log + PWLS => standard descriptions

for your log's service, tools, and channels• your log database + PWLS => search for

logs using non-proprietary keys


PWLS Process

• Industry standard dictionaries maintained by POSC community, administered by POSC

• Company-defined dictionary content managed by respective companies, facilitated by POSC

• Classification of company-defined mnemonics submitted by respective companies, validated by industry


Current Work in Progress

• Update PWLS curve classes, property types from WITSML 'realtime' (MWD) class dictionary

• Incorporate PWLS curve classes into WITSML wellLog channel classifications

• Recent proposal for managed dictionary of curve and parameter definitions, e. g. for use as LAS dictionaries


PWLS Change Requests

Joined and Interpreted MnemonicsSource: Shell


Well Logs: Business IssuesHuge numbers of curves (information overload)

Most oil company customers only load a small sub-set of curves into their data stores

Huge numbers of curves (information overload) Most oil company customers only load a small sub-set of curves into their data stores

Complex naming at BOTH Curve and Tool level Confusing even to petrophysicists Others got lost years ago!

Complex naming at BOTH Curve and Tool level Confusing even to petrophysicists Others got lost years ago!

Hard to find up to date information in public domain Isolated lists, complex language

Hard to find up to date information in public domain Isolated lists, complex language

Expert (petrophysicist) and generalist users have different requirements

Expert (petrophysicist) and generalist users have different requirements


Information Overload - Business Value

Most CommonlyLoaded

RarelyLoaded

Loaded Curve Names

Load Frequency High Business ValueMost oil company customers only load a small sub-set of curves into their data stores

Medium Business ValueLoaded for specialist applications

Note: Business Value does not take account of usage. It deals with the ‘average’ case


Company:

Service Class:

Tool Series:

Service-Channel Xref:

Channel/Curve (Mnemonic):

Tool Class: Curve Class:


Company:

Service Class:

Tool Series:



Tool Class:

Curve Class:

Generic Name:

FunctionModifier(s):Pure Property:Technique:Object:

Querysimple

specific


Examples of Company Curve Classifications

Company (and Code)

Curve Mnemonic

Curve Description Business Value

Curve Class

Baker 150 GR Gamma Ray HIGH Gamma_Ray

Schlumberger 440

SP Spontaneous Potential HIGH Spontaneous_ Potential

Baker 150 CAL Caliper HIGH Caliper

Baker 150 RD Deep resistivity MED Deep_Laterolog_Resistivity

Baker 150 RS Shallow resistivity MED Shallow_Laterolog_Resistivity

Baker 150 RMLL Micro-laterolog resistivity

HIGH Micro_Laterolog_Resistivity


For Oil Company Generated Curves

Recommended Curve Mnemonics


Company: POSC (1000)

Service Class: Joined, Interpreted

Tool Series:Joined, Interpreted





PWLS Joined (1 of 3)Company (and Code)

Curve Mnemonic


Curve Class

POSC 1000 AC Acoustic Slowness HIGH Acoustic_Slowness

POSC 1000 AC_SHEAR Shear Slowness HIGH Shear_Slowness

POSC 1000 AC_SHR_CAL

Calibrated Shear Acoustic Slowness

HIGH Shear_Slowness

POSC 1000 AC_SHR_BP Geophysical Shear Acoustic Slowness

HIGH Shear_Slowness

POSC 1000 AC_COMP Compressional Slowness

HIGH Compressional Slowness

POSC 1000 AC_CMP_CAL

Calibrated Compressional Acoustic Slowness

HIGH Compressional_Slowness

POSC 1000 AC_CMP_GP

Geophysical Compressional Acoustic Slowness


POSC 1000 AC_IMP Acoustic Impedance HIGH Acoustic_Impedance


2004 Shell Change Requests• In summer 2004, Shell presented an alternate

set of joined and interpreted curve mnemonics at PWLS meetings

• Shell and POSC staff analyzed the similarities and differences, resulting in a set of Change Requests

• 6 Change Requests– Were posted for comment– Were resolved based on comments received

• Accepted changes constitute Version 2.1 update


Curve Naming Standards in Shell

PresentingTo

POSCSIG

6/2004

CollatingExisting

Documents

8/2003

CreatingVirtualTeam

(Domain Experts &Data Managers)

9/2003

Endorsed byDiscipline

LeadershipTeam

3/2004

DiscussingPWLS

Change Request

with POSC

12/2004

• Joined Curves• Calculated / Interpreted Curves

Internal: ImplementingExternal....


Shell Curve Naming Standards vs. PWLS V2.0Joined & Calculated Curves

SIMILARITIES:• Most maps comfortably

DIFFERENCES:• Terminology:

– DT vs. AC• Granularity:

– PWLS V2 Porosity does not have classes Net or Net Effective– HC Saturation does not have any subclass– Water Saturation does not have any subclass except Flushed Zone– Resistivity Depths of Investigation does not differentiate Shallow and Micro

• Scope:– PWLS does not cover RFT pressures, TVD, FLD, LITH, Cased Hole, etc.– Shell does not cover Minerals, Drilling Bit Size, etc.

• Flexibility:– Shell allows local specific for Volume Fractions– Shell allows interpretation method as the suffix for all Calculated Curves


Change Requests and Results1. Acoustic:

– Add Stoneley Slowness curve – Accepted– Replace AC with DT – Not Accepted

2. Resistivity:– Differentiate Shallow and Micro – Accepted

3. Permeability:– Replace LPERM with PERM – Accepted

4. Porosity:– Remove Total Porosity. Use generic Porosity instead – Not Accepted– Add Effective, Net Effective – Accepted

5. HC Saturation:– Add Net, Effective, Effective Net, and Flushed Zone – Accepted

6. Water Saturation:– Add Net, Effective, and Effective Net - Accepted


PWLS V2.0 – Use in Shell• Petris is working on implementing PWLS v2.0 standard

for Raw Curves in Recall by Shell’s request; – Plan to implement PWLS v2.0 for Raw Curves Names in Recall Standard

Data Dictionaries– Shell Global Standard on Joined and Calculated Curves implemented in

Global Recall Data Dictionaries; Deviations to PWLS V2.0 need to be revisited

• Shell is working on:– How and to what extend to use PWLS V2.0 (Raw Curves)

• Property Types• Attributes

– Mapping between:• TechLog Curve Family • Recall Curve Types• PWLS Property Types

– Targeting to find alignment by end of 2005


PWLS Joined (1 of 3): Change ResultsCompany (and Code)

Curve Mnemonic


Curve Class

POSC 1000 AC Acoustic Slowness HIGH Acoustic_Slowness

POSC 1000 AC_SHEAR Shear Slowness HIGH Shear_Slowness

POSC 1000 AC_SHR_CAL

Calibrated Shear Acoustic Slowness

HIGH Shear_Slowness

POSC 1000 AC_SHR_BP Geophysical Shear Acoustic Slowness

HIGH Shear_Slowness

POSC 1000 AC_COMP Compressional Slowness

HIGH Compressional Slowness

POSC 1000 AC_CMP_CAL

Calibrated Compressional Acoustic Slowness


POSC 1000 AC_CMP_GP

Geophysical Compressional Acoustic Slowness


POSC 1000 AC_STONE Stoneley Slowness HIGH Stoneley_Slowness

POSC 1000 AC_IMP Acoustic Impedance HIGH Acoustic_Impedance

REMOVED


PWLS Joined (2 of 3)Company (and Code)

Curve Mnemonic


Curve Class

POSC 1000 BIT_SIZE Bit Size HIGH Nom_Borehole_Size

POSC 1000 CALI Caliper HIGH Caliper

POSC 1000 DEN Density HIGH Bulk_Density

POSC 1000 DEN_GP Calibrated Geophysical Density

HIGH Bulk_Density

POSC 1000 GR Gamma Ray HIGH Gamma_Ray

POSC 1000 NEU Neutron Porosity HIGH Neutron_Porosity

POSC 1000 PR Poisson Ratio HIGH Poisson_Ratio

POSC 1000 TIM_DEP Time Depth HIGH Time

POSC 1000 VP_VS Compressional to Shear Acoustic Velocity Ratio

HIGH Compressional_Shear_Velocity_Ratio


PWLS Joined (3 of 3): Change Results

Company (and Code)

Curve Mnemonic


Curve Class POSC 1000 K Potassium HIGH Potassium_Concentrati

on

POSC 1000 GRKT Potassium Plus Thorium

HIGH Gamma_Ray_Minus_Uranium

POSC 1000 TH Thorium HIGH Thorium_Concentration

POSC 1000 U Uranium HIGH Uranium_Concentration

POSC 1000 PEF Photoelectric Factor HIGH Photoelectric_Factor

POSC 1000 SP Spontaneous Potential HIGH Spontaneous_Potential

POSC 1000 RES_DEP Deep Resistivity HIGH Deep_Resistivity

POSC 1000 RES_MED Medium Resistivity HIGH Medium_Resistivity

POSC 1000 RES_SHA Shallow Resistivity HIGH Shallow_Resistivity

POSC 1000 RES_MIC Micro Resistivity HIGH Micro_Resistivity

POSC 1000 RT Formation Resistivity HIGH Formation_Resistivity

POSC 1000 RXO Flushed Zone Resistivity

HIGH Flushed_Zone_Resistivity


PWLS Interpreted (1 of 2): ChangesCompany (and Code)

Curve Mnemonic


Curve Class POSC 1000 PERM Permeability HIGH Permeability

POSC 1000 PERM_NET New Log-derived Perm.

HIGH Permeability

POSC 1000 POR Porosity HIGH Porosity

POSC 1000 POR_EFF Effective Porosity HIGH Effective_Porosity

POSC 1000 POR_NET Net Porosity HIGH Porosity

POSC 1000 POR_EFF_NET

Effective Net Porosity HIGH Effective_Porosity

POSC 1000 POR_TOT Total Porosity HIGH Total_Porosity

POSC 1000 SHYD Hydrocarbon Saturation

HIGH Hydrocarbon_Saturation

POSC 1000 SHYD_EFF Effective Hydro. Sat. HIGH Hydrocarbon_Saturation

POSC 1000 SHYD_NET Net Hydro. Sat. HIGH Hydrocarbon_Saturation

POSC 1000 SHYD_EFF_NET

Effective Net Hydro. Sat.


POSC 1000 SHYD_XO Flushed Zone Hydro. Sat.


POSC 1000 SW Water Saturation HIGH Water_Saturation

POSC 1000 SW_EFF Effective Water Sat. HIGH Water_Saturation

POSC 1000 SW_NET Net Water Saturation HIGH Water_Saturation

POSC 1000 SW_EFF_NET

Effective Net Water Sat.

HIGH Water_Saturation

POSC 1000 SX_XO Flushed Zone Water Sat.

HIGH Flushed_Zone_Water_Saturation

NOT REMOVED


PWLS Interpreted (2 of 2)Company (and Code)

Curve Mnemonic


Curve Class POSC 1000 VANHYD Anhydrite Volume HIGH Anhydrite Volume

Fraction

POSC 1000 VCLAY Clay Volume HIGH Clay Volume Fraction

POSC 1000 VCOAL Coal Volume HIGH Coal Volume Fraction

POSC 1000 VDOLO Dolomite Volume HIGH Dolomite Volume Fraction

POSC 1000 VHALITE Halite Volume HIGH Halite Volume Fraction

POSC 1000 VLIME Limestone Volume HIGH Limestone Volume Fraction

POSC 1000 VSAND Sand Volume HIGH Sand Volume Fraction

POSC 1000 VSHALE Shale Volume HIGH Shale Volume Fraction


PWLS Change Requests(new)

1. Generic Curve Classes2. New Curve Classes

Source: CDA


Information Overload - Business Value

Most CommonlyLoaded

RarelyLoaded

Loaded Curve Names

Load Frequency High Business ValueMost oil company customers only load a small sub-set of curves into their data stores

Medium Business ValueLoaded for specialist applications

Note: Business Value does not take account of usage. It deals with the ‘average’ case


Company:

Service Class:

Tool Series:





Company:

Service Class:

Tool Series:



Tool Class:

Curve Class:

Generic Name:

FunctionModifier(s):Pure Property:Technique:Object:

Querysimple

specific


Examples of Company Curve Classifications

Company (and Code)

Curve Mnemonic


Curve Class &Generic Curve Name

Baker 150 GR Gamma Ray HIGH Gamma_Ray [GR]

Schlumberger 440

SP Spontaneous Potential HIGH Spontaneous_ Potential [SP]

Baker 150 CAL Caliper HIGH Caliper [CAL]

Baker 150 RD Deep resistivity MED Deep_Laterolog_Resistivity [RES_DEP]

Baker 150 RS Shallow resistivity MED Shallow_Laterolog_Resistivity [RES_SHA]

Baker 150 RMLL Micro-laterolog resistivity

HIGH Micro_Laterolog_Resistivity [RES]


Draft Change Requests…PWLS Generic

Curve NameCDA CS-3 Generic

Curve Type = CURVE_ +

Comment / Change Request

CAL CAL Caliper matches

DEN DEN Density matches

INC Change Request: Add Curve Class = Inclinometry

NEU NEUTRON

Alias: Neutron

GR NGR Alias: Natural Gamma Ray

NMR NMR Nuclear Magnetic Resonance matches

RES, RES_DEP, REF_MED, RES_SHA, RES_MIC

RES Granularity Difference


Draft Change Requests…PWLS Generic Curve

NameCDA CS-3

Generic Curve Type = CURVE_

+

Comment / Change Request

AC, AC_COMP, AC_SHEAR

SON Alias and Granularity Differences; sonic (SON) with acoustic (AC)

SP SP Spont. Potential matches

TEMP TEMP Temperature matches

TIME Change Request: Add Time

DIP, GR_MINU, K, MNR, PEF, PERM*, POR*, RT, SHYD, SIGMA, SW, TH, U, V*

OTHER NB: CDA also use QUARANTINE to data pending further work


Next Steps• Review and refine change requests with CDA.• Produce change request document. • Post change requests with 6 to 8 week comment

period; conduct conference call within Geology / PWLS community.

• Evaluate feedback• Accept uncontested change requests and cycle

contested ones for reconsideration.• Publish updated Standards and promote usage.


Alan DonigerPOSC Chief Technology Officer

24 Greenway PlazaSuite 1000-B

Houston, TX 77046-2401+1 713 267-5124 phone

+1 713 784-9219 [email protected]://www.posc.org

© copyright 2006 posc pwls update aberdeen, scotland june 21, 2006

Documents

posc classification

posc community

industry slide

posc pwls update aberdeen

service class

posc pwls change requests

posc pwls website http

managed dictionary of