POSC / WITSML Mudlog SIG - April 27, 28 2004

1. POSC / WITSML Mudlog SIG - April 27, 28 2004 Project Review • 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

2. 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

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

4. 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)

5. 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’

6. 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: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> • </w:annotation> 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

7. 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

8. Examples: • Annotation • Lithology • Annotation • Interpreted Interval • Mixed Interval • Directional Survey • Annotation • 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’

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

10. 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 ? ?

11. 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

12. Thank - You

13. 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.