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Practical Well-log Standards Phase 2 London 30th Jebruary, 2001. Agenda. 10:00Introduction 10:15Phase 1 Summary and Analysis 11:15Practical Implementation 11:30Phase 2 Definition 12:30Lunch 13:30Phase 2 Management 14:00Close. Introduction. David Archer. End. Agenda. - PowerPoint PPT Presentation
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Practical Well-log StandardsPhase 2
London30th Jebruary, 2001
Agenda
10:00 Introduction 10:15 Phase 1 Summary and Analysis 11:15 Practical Implementation 11:30 Phase 2 Definition 12:30 Lunch 13:30 Phase 2 Management 14:00 Close
Introduction
David Archer
AgendaEnd
Well-Log Management Business Issues
Data overload Too many curves - users can’t find the important
data
Complex naming Both curve and ‘LOG’ (collection of curves) names
are complex and changing at an ever increasing rate No consistency over time Confusing for experts and generalists alike
No recognised central source for well-log naming standards
End
Data Overload Business Value
Real “Business Value” is concentrated in a relatively small number of data curves - filtered views focus on high value data
Data Volume Business Value
50,000+'Visible'
AcquisitionCurves
1000+?‘Useful’Curves
Category 1
Category 3
Category 2
mapping
Data Overload!Data Overload!
End
Confusing Names
LOG*/Tool Names GRAND SLAM DSI Vs DSST Vs SDT? PEX (HALS) HALS, HDLL, HDIL,
HGNS, HNGS, HRDD, HRGD
PROC1 DAVE21 22MAY97 COMP GEOL
* LOG refers to a collection of curves: for example from a logging acquisition or interpretation process
CURVE Names Sonics: DT1R, DT4P,
DT4S, DT5, DTCR, DTMN, DTRP, DTSD, DTSM, DTHC, DTHU
Densities: RHOZ, NRHB, RHOM, HNRH, HRHO, RHOB, HDEB, HROM
712, 7121, 7122 All Sonics: DT, Densities:
RHOB GR_ED_001_AJB
End
Clear NamesTool
Tool Names: for acquisition data Keep full ‘technical/marketing’ name (information) Generic Tool String Name from component Tool Types (this
is main LOG-level NAME that is understandable to all and will be time-invariant
Specific Tool String Name created by concatenating component tool names (information and searchable)
(Other process stages) standard names for key ‘composite’ and ‘CPI’ data
sets
Purpose: to ‘de-mystify’ proprietary and esoteric naming systems
End
Generic Tool Type AttributeExamples
Tool Type Description
ARES Array ResistivityARIN Array InductionARLL Array LaterologASON Array SonicCAL CaliperCCL Collar LocatorCEM Cement EvaluationDEN DensityDEN.NEU Density/NeutronDIP DipmeterELEM ElementGR GammaIMG Imaging ToolIMGA Imaging Tool - AcousticNEU Neutron Porosity (dual spaced)NEU.NEUP Neutron Porosity/Pulsed NeutronNEUP Pulsed NeutronNMR Nuclear Magnetic ResonancePERF PerforatingPRES PressurePRES.FLOW Pressure/FlowmeterRIN InductionRLL LaterologRLL.RMIC Laterolog/Microresistivity
End
Clear NamesCURVE
CURVES Keep original Mnemonic as CURVE NAME Curve Property Type– Curve Type: generic classifications
which helps user understand purpose and can be used to drive processing
Property Type – based on extending Schlumberger’s original classifications
Curve Type – a ‘short-form’ version of the above based on mnemonic tokens
Property Type and Curve Type map one-to-one DESCRIPTION: a text description of the curve
Use generic names to ‘de-mystify’ proprietary and esoteric naming systems
End
Curve and Property Type AttributeExamples
Curve Type Property Type
Note on Curve Type Structure• Separator improves readability• Hierarchical structure - can set to level of detail required• Structure facilitates searching/listing• Can be treated as a single value (easy to use in existing systems)
AC.AMP. Acoustic_AmplitudeAC.ATT. Acoustic_Attenuation_RateAC.CBL.AMP. CBL_AmplitudeAC.CBL.QUAL. CBL_Quality_IndicatorAC.DTD. Sonic_Data_DensityAC.POR.APP.LIM. Sonic_Porosity_LimestoneAC.POR.APP.SND. Sonic_Porosity_SandstoneAC.SLO.STN. Stoneley_SlownessACCEL. AccelerationACCEL.X. X_AccelerationCAL.AC. Acoustic_CaliperCAL.DIF. Differential_CaliperCON.ARR.IND. Induction_Array_ConductivityCON.ARR.LAT. Laterolog_Array_ConductivityCON.DEP. Deep_Conductivity
End
Phase 1 Deliverables
Standard CURVE level attributes and reference values Business Value
Property and Curve Type
Classification hierarchy
Standard TOOL level attributes and reference values Generic, Technical and Marketing Tool Names
Web-based delivery mechanism
End
Phase 1 Project Management
POSC Multi-company sponsored Project POSC Management Flare Consultants as Technical Contractor
End
Project Management
Phase 1 consists of:Definition
Phase
Delivery Stage 1
Delivery Stage 2
Delivery Stage 3
End of Phase 1
Dec-2000
3 delivery stages
1 definition phase tool lists and grouping attribute definitions and usages
tools grouped by stage and service company
service companies make initial classifications
service company classifications 'normalised'
TechCom, Steering Group approval and publication
End
Lessons Learned
Things always take longerthan expected
Build on existing work – but need to balance ‘legacy’ effects
Main classification issuesare understood and solved
Difficult to get oil companyinvolvement/feedback
Is TechCom – Steering Groupsplit effective?
The project is deemed a success butuptake will be the real test
End
Success Factors
Need enthusiasm to keepProjects moving forward
AgendaEnd
Maintenance is veryimportant
Communicate results – but ittakes resources
Maintenance in Phase 1
Current maintenance is ‘self-policing’ Website can be updated by authorised service
company users Current standards are held as (an extendable) look-
up list Question:
Is this sufficient to prevent ‘standards creep’ due to Misapplication of existing standards Arbitrary addition of further classifications
If not, what is the alternative and is it cost-effective? Release schedule?
Should there be a release schedule?
Success FactorsEnd
Practical Implementation
Ingvar Espeland, PetroData The value of a common standard
A common dictionary
Business Value provides a selective loading mechanism
Norwegian DISKOS database dependencies Phase 2 required for completeness
DISKOS and CDA cooperation
AgendaEnd
Phase 2 Definition
Acquisition companies: their support is critical Undertake the bulk of the technical work Focus on technical details of acquisition process Baker and Schlumberger have already expressed an
interest Halliburton? Others?
Oil Companies Needed to provide a ‘reality-check’ on deliverables Focus on use of well-log data
End
Phase 2 Definition
Define target customers: Generalist
Tool-level standards Curve definitions for KEY products (Composites, CPIs)
only Specialist
Curve-level standards
End
Phase 2 Definition
Phase 2 Deliverables Extend scope of acquisition tools covered
Older technology tools Specialist tools Production tools Dipmeter/Image Mechanical Inspection
End
Phase 2 Definition
Phase 2 Deliverables Processed or Interpreted data sets
Composited sets (standard curve names/types, log names)
Interpreted sets
Web site improvements Cater for generalist and specialist users
End
Phase 2 Definition
Phase 2 Timing Phase 1 Stages were highly coupled Could deliver Stages more easily if coupling was
minimal: Older technology tools are unlikely to require much
additional technical input Processed and Interpreted products are not strongly
linked to tools Phase 2 is behind Phase 1 in terms of annual cycle.
Should optimise early deliverables before summer holiday season
AgendaENDEnd
Phase 2 Management
David Archer
Agenda