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