1. Evolution 1

2. WITSML Life Cycle Timeline Years 2000-20012002-20032004-20052006-20072008-20092010-2011 Version 1.0 Version 1.1 Version 1.2 Version 1.3.0 Version 1.3.1 Version 1.3.1.1 Version x.x? Version x.x.1 Version y.y Stage 8: AuditStage 5/6: ReleaseStages 2-5: DevelopmentStage 6,7: Deployment Stage 1 Planning

3. The Evolution of WITSML Standards - 1 Version 1.0 (2001) – first prototype specifications –Public Seminar in Austin, Texas Version 1.1 (2002) - Minor schema changes. Added server capabilities support –Public Seminar in Stavanger, Norway Version 1.2 (2003) – First version used widely –Public Seminars twice per year Follow 2 to 3 days of technical working meetings –Vendor Exhibition added in 2004 Version 1.3.0 (2005) - Tightening of constraints in data schema and web services specifications. Decoupled API from data schema. 3

4. The Evolution of WITSML Standards - 2 Version 1.3.1 (2006) – Minor cleanup, clarification, etc. Added XML version-to-version conversion script Version 1.3.1.1 (2007) - Bug fixes for data schema. Version 1.4.0 (2008) –Data schema documentation minor clarifications and backward compatible additions to data schema. –More Web Services minor clarifications. –Documented behavior for indicating changes. –Documented behavior for Store interface used for real-time data. –Public Seminar and Vendor Exhibition May in Houston, Texas November in Dubai, UAE 4

5. WITSML: Open Issues List

6. WITSML: Strategic Challenges 1.Grow from Early Adopter Use to Full Deployment 2.Widen the footprint of WITSML data types in use. 3.Engage Completion Contractors. 4.Refine ability to automate transfers. 5.Address workovers, maintenance, and services. 6.Address more analytical, decision-making processes. 7.Support use by PRODML. 8.Address bi-directional data transfers, e.g. well paths

7. WITSML: Measuring Progress Are we delivering the objective for the WITSML Standards? –Enable decisions using ‘Real Time’ data Proven, deployed solutions delivering real-time data for decision-making –Simplify data interaction and data reuse 90% of data transferred is related to four WITSML data objects Limited use of “Operational Information” –Reduce complexity Incorporation of new data has moved from days to hours and minutes Initiation of new data use still issue Some data errors still exist –Reduce cost Time savings –5 minute intervals on loading are now considered “Normal” or “Maximum” Technology Improvements –Application use of real-time data increasing More accuracy –Adoption and Use rate indicates value

8. Use 8

9. 9 Simplicity and Integration Simplicity –Achieved through Consistent data element and structure definitions and semantics Consistent interfaces among cooperating software components Integration –Achieved through the ability to Compare and Combine –Data from multiple diverse sources.

10. 10 Drilling Data Architecture (without WITSML)

11. 11 Drilling Data Architecture (with WITSML)

12. Slide 12 WITSML: Transfer End-Points Service Contractor to Service Contractor Service / Drilling Contractor to Operator Application to Application Operator to Operator Operator to Government

13. Slide 13 Example: Sharing a BHA description at the rig between different service vendors Usage: Reduce inefficient duplicate entry of data. Improve quality of stored data Service Contractor to Service Contractor

14. Slide 14 Drilling / Service Contractor to Operator Example: Automation of transfer of electronic report data from drilling contractor. Example: Geological data from Mud Logging company into wellsite composite log application Usage : Avoid costly re-keying of data received in paper form. Ensures all gathered data is stored in company repositories.

15. Slide 15 Application to Application Example: Migrating data from one proprietary format to another, using the WITSML API as the data mapping tool. Usage: Wellbore hardware configuration viewer, input to simulation models or 3D visualisation displays

16. Slide 16 Operator to Operator Example: Operator Daily drilling report object to a partner Usage: Current partner reports do not allow loading of data into company database. Access to data allows viewing in a format users are comfortable with, and retaining the data for benchmarking

17. Slide 17 Operator to Government Example: Filing of statutory documents relating to the well permitting process. UK DTI, Norway’s NPD, US MMS, BLM etc. Usage : Automate statutory reporting, reduced custom keying of data

18. What would success look like? Goals stated in Real Time/WITSML usage study 1 : “Access to the information I need to make time- critical decisions, regardless of who I am currently working with (as a Service Company)” “Save me 15 minutes a day, by not having to type in some data that is already in electronic format somewhere else” “Allow me to understand what is happening, at anytime, for any (drilling) operations, anywhere” “The ability to use drilling data from any technology provider within our (internal) processes for decision making” “Neutral way of encapsulating information so that it is available regardless of vendor, provider or version of their various technology” Operators Service Companies Information 1 – Marketing Analysis of Real Time Workflow initiatives. Landmark/Halliburton 2004

19. WITSML – Examples of Use Operating Company “A” 300+ wells affected by WITSML Impact in all regions of drilling activity 2 month study in 2006: –29 wells in WITSML –250000 ft drilled using WITSML Operating Company “B” 87 wells affected by WITSML –51 in first ¾ of 2006 alone Typically 10-15 actively running (WITSML) at any time Typical operations –5 minute update intervals –Operations Support Source – WITSML (October 2006) Public Forum presentations

20. InterACT Scalability - Getting data to where its needed….. Depth Data Geoframe etc Trajectory Data Drilling Office etc Time Data Operational Data Downhole Tools Wellsite data acquisition, aggregation and display Rig Sensors InterACT “DataHub” Client ”ODC” Schlumberger Secure Center Schlumberger OSC InterACT “Hub” InterACT “Inside” Specialist Services NDS / Perform Geosteering Remote Monitoring Remote Control Asset Team Experts Web based viewers InterACT interfaces:- WITSML API WITSML Streaming WITSML Data Exchange