Project Review POSC / WITSML Mudlog SIG - April 27, 28 2004 Agenda: Presented by Cary Fico (ExxonMobil) Participants: John Lottinville (BHI) Jim Theriot (POSC) Agenda: Project Status & Examples Next Steps Project Resources POSC Presentation Mudlog SIG Apr 2004.ppt

Complexity of Mudlog Data Content from Different Sources / Operations Gas & Hydrocarbon Data hydrocarbon shows; staining, fluorescence, cut total gas, gas chromatograph analysis (component concentrations), gas ratios H2S & CO2 Cuttings & Lithologic Data lith description rock type, color, texture etc., visual porosity interpreted log and lithology percentage log Mud Data composition, volume, temp, resistivity, mud wt (in/out) Drilling & Operation Data hole depth, ROP bit info: bit trips, type, no.,WOB, RPM drilling parameter changes, drilling rate exponent pump pressure, mud rate, mud pump stroke counts coring points, DST, LOT MWD / LWD

Mudlog Data Definitions (Partial List) Approximately 175 types of information

POSC / WITSML Meeting: Sep 18, 19 2003 POSC / WITSML Meeting: Mudlog Initiative Agreed upon as high priority. Interested Parties: Shell [Linda Dodge] BP [Matthew Kirkman] Statoil [Oivind Berrgraf] ExxonMobil (Cary Fico) Paradigm [John Turvill] Datalog [David Tonner] Baker Hughes Inteq [John Lottinville, John Shields] Halliburton Sperry Sun [Robert Schave] Petrolink [Nick Williams] SDC Geologix [Samit Sengupta] POSC (Alna Doniger, Jim Theriot) Landmark (Marcus Ridgway)

Mudlog Worksessions: Dec 2003 - Apr 2004 Core Work Team POSC (Jim Theriot) Baker Hughes Inteq [John Lottinville] ExxonMobil (Cary Fico) Early Discussions SDC Geologix [Samit Sengupta] Datalog [David Tonner] ?? Mudlog Data Definitions Map to WITSML Elements Propose New Elements ‘Cold Eyes’ Review of Data & Elements Review of Other Implementations Data Flow / Process Data Exchange Data ‘Packaging’

Annotation Style of Information Mudlog Data Elements WITSML Element - New - Mudlog Annotation <?xml version="1.0" encoding="UTF-8" ?> - <w:mudLogs xmlns:w="http://www.witsml.org/schemas/130"> - <w:mudLog> - <w:annotation> <w:annotationType>Midnight_Depth</w:annotationType> <w:mdDepth uom="ft">11695</w:mdDepth> <w:text>12/7/02</w:text> </w:annotation> <w:annotationType>Core_Interval</w:annotationType> <w:mdTop uom="ft">9000</w:mdTop> <w:mdBottom uom="ft">9090</w:mdBottom> <w:text>Core #3. Core 81/2 “ from 9000 MD to 9090 MD, recovered 98%</w:text> Casing Point Midnight Depth Bit Change Bit Parameters Short Trip Gen Engr Comment Core Interval Sidewall Core Gas Peaks Show Report Circulation System Comments Steam Sill Results Gen Chromatograph Comment Lithlog Log Comment General Mudlog Comment Directional Survey Comment MudCheck Paramertes Wireling Log Run Etc... annotation type mdTop - uom & depth; mdBottom - uom & depth or mdDepth - uom & depth text

Curve Style Information Mudlog Curve Data WITSML Elements - logHeader, logCurveInfo, logData Curve Data Drilling Ops ROP RPM Torque WOB Hookload SPM Pump Pressure Dxc Gas Total Gas Reference Gas C1, C2, C3 ... Etc. log.xsd logHeader logCurveInfo mnemonic - use spreadsheet ‘curve mnemonic’ units mnemonic index nullValue classPOSC - Property Type Name (PWLS classification) mnemAlias - not needed curveDescription - use spreadsheet ‘Description’ logData

Examples: Annotation Lithology Interpreted Interval Mixed Interval Directional Survey Survey Object Log / Curve Objects Lithology Qualifier Hydrocarbon Show Discrete Value Data Mudlog Data Definitions Map to WITSML Elements Propose New Elements ‘Cold Eyes’ Review of Data & Elements Review of Other Implementations Data Flow / Process Data Exchange Data ‘Packaging’

Business View: Complexity of Capturing and Distributing Mudlog Data Rig Rig Server HTTP Mudloggers or WSG Server Cuttings lithology & show Screens descriptions, calcimetry , shale density On-line plots Contractor Reports Drilling (DOC, XLS) Real-time Analysis Log Image Sensors (PDF, PDS) HTTP Engineer Raw Comments & Reports (DOC, XLS) Data Observations Multiplex Mudlogger’s Time Log Image Data Edited (PDF, TIFF) Database disk Depth Samples/ Geol Data File (ASCII, LAS) Cores Ops transported Data /FE Bus. Unit from disk wellsite Generalized Data Flow Model (Changes with time, technology and organizational roles) WSG Lithology & Show Descriptions from SWC and cores Network WITS WSG E-Mail, Reports HTTP Comments & Wellsite (DOC, XLS) Observations HTTP Geologist Log Image (PDF) Archive QA/QC HTTP Screens Memory Real-time On-line plots Tools Data HTTP Ext Links Raw Engineer Reports (DOC, XLS) Data Comments & Data LWD/MWD Observations Log Image disk Multiplex (PDF, PDS, Database Edited TIFF) Gov Partners/ Data File (ASCII, LAS) Tools Engineer Raw Comments & Data Data Observations Log Image disk (PDF, PDS) Wireline Edited Multiplex Database Data File (DLIS, LAS) Real-time Screens On-line plots Rig Server

Mudlog Format / Media Standards Data Transfer, Usage and Display Data Type Recommended Format Curves & Associated Data Log Image Log Drawing File (Geo) Files / Reports Etc. Physical Media LAS 3 (LAS 2+, XML) .PDF (.PDS, .TIFF) .ODF .xls, .doc, .mdb Needs to be worked with data providers, database & apps vendors ? ?

Next Steps & Project Resource Review ExxonMobil, BHI, POSC, Datalog, Geologix, Landmark, ?? ‘Cold Eyes’ Review Mudlog Data Content, Mapping to WITSML Elements Propose Mudlog data process as seen in ‘Business View’ - how data is generated, captured, distributed, used Data ‘Packaging’ (Multiple Objects / Multiple Data Streams) Use of WITSML Server - Publish, Subscribe ... Service Provider and Application Vendor Specifications Tentative Pilot Project 4th Qtr: pending scope and commitment Organizational Acceptance & Use Future Potential (2005 - 2006 ?) Core Analysis / Reports WITSML Object Fluid Reports WITSML Object Formation Evaluation / Log WITSML Object Operations Report / Daily Drilling WITSML Object Real Time Data WITSML Data Object

Thank - You

Benefits Why Standardized Formats ? (Data Content) Ensure complete data set; with at least minimal data + information Expedite data receipt & loading, data search & tracking Expedite transfer and integration of data for Engineers & Geoscientists Simplify the Complexity - WITSML benefits achieved through data schema standards applied across different processes (as provided by service providers and internal departments) that generate or modify data; eliminate need for point to point specifications for data exchange Business Benefits Reduce administration costs Reduce loss of data & cost associated with re-order, time searching or re-creating data Reduces time & costs associated with data loading into repositories and applications Improves data quality by ensuring data is complete and fit for business use. Improved decision making i.e more comprehensive information readily available when needed in a useable format.