Wellsite Information Transfer Standard Markup Language, WITSML, an Introduction Alan Doniger, POSC November 2004

WITSML™ – Wellsite Information Transfer Standard Markup Language The “right time” seamless flow of well site data between operators and service companies to speed and enhance decision-making A New Open Information Transfer Standard for the Oilfield

WITSML started as a collaborative effort to update the widely used WITS standard for moving drilling data between rig and office based computer systems WITSML is designed for the standards of today's “always on” Internet environment while still accommodating those rigs not yet “Wired” WITSML is published and available to all to implement Real world use of WITSML is happening NOW The scope of practical usage is being extended based on practical experience and pragmatic needs

The POSC WITSML™ Special Interest Group (SIG) The WITSML SIG is the formal user community for the WITSML standards. –Membership is open to all (POSC members and non-member alike) –Membership has grown in ’04 from 17 to over 30 –The SIG recognizes requirements and needs –The SIG is the first line of review of new and updated specifications –The SIG helps promote vendor take-up and operator deployment

April '04 in Calgary

Nov. '04 in Paris

Special Interest Group Participants Operators Statoil BP Shell ExxonMobil ChevronTexaco Pioneer Nat. Res. Hydro ONGC Total Regulators UK DTI US DOI Service/Software Suppliers Baker Hughes Landmark/Halliburton/Sperry Schlumberger NPSi Sense Technology SDC Geologix Petrolink INT Paradigm UPEG POSC special interest groups are open to all interested parties. Recent New SIG members Service/Software Suppliers Pason Weatherford OpenSpirit HRH Geological Services Smith Technologies IFP Interaction US Synthetic Knowledge Systems AspenTech

Sample WITSML Data Flow API server (InterACT) Office(s) Wellsite(s) Source: Schlumberger

Real-time drilling Alarms Raw Data Archive FilterTransform WITSML Technical Database Environment Service company Technical Application Environment RIG or OFFICE Source: Landmark Right-time Data

Wellsite data transferred to WITSML Server Real time via subscription Batch via file transfer etc. Data upload to Total Recall WITSML API calls from 3 rd Party systems MWD Wireline Total Recall Server Mudlogging Client Applications Client User RigLink/WITSML Data Aggregator Wellsite Real Time Data Feeds via WITSML Publish & Subscribe Upload Log Data Connect via Internet or WAN OpenWorks / Geoframe OpenWorks/GeoFrame Server Proprietary Data Store Fluids/DD Batch Transfer Total Recall Access via Internet Query Source: Baker Hughes Information Delivery via

Bottom Hole Assembly Run Cement Job Conventional Core Fluids Report Formation Marker Log (updated) Message Mud Log (updated) Operations Report Real Time (updated) Rig / Rig Equipment Server Capabilities Sidewall Core Subscription Survey Program Target Trajectory & Trajectory Station (updated) Tubular / Bit Record / Open Hole Well Wellbore (update) Wellbore Geometry Risk (new) Event Notification (new) Completion / Well Mechanical (draft) Regulatory Permitting and Reporting (draft) Data Objects: Original, New, Updated, Draft

Benefits Improved “plug and play” for moving data between “systems” Operators: reduce cost, improve vendor competitiveness Contractors: reduce need to support different systems for different operators (Near) real-time, sequential data, but also contextual data

Internet standards driven / Hardware & software platform independent XML (eXtensible Markup Language) & xsd, (XML schema definition) WITSML Server Application Programming Interface (API) XML Specification of data objects A formal and validated “Dictionary” and “Grammar” World Wide Web-compatible / Web services HTTP, SOAP & WSDL, XML Broad coverage of mainly drilling related data Well, trajectory, drill string, wellbore, reports, logs, real time data Designed to support drilling workflows, with or without network links WITSML Server Behavior Profiles Data Transfer, Data Management, Data Archive Technologies

CURRENT RELEASE Version 1.2 Released in early 2003 FUTURE PLANS Version 1.2 Clarifications (published as identified) Version 1.3 Updates (release ~ Feb. 1, 2005) Version (release ~ late 2005) EXPANSION AND INTEGRATION During 2004, existing and new POSC data transfer standards are being adapted as part of a broader based family of standards based on WITSML’s technical architecture and characteristics WellPathML  Trajectory and Wellbore (path), WellLogML  CompositeLog, WellSchematicML  Completion, etc. What’s Happening and What’s Next?

WITSML Version 1.3 Highlights General –Data object (schema) and Server (API) specifications are now independent and will evolve separately –Server behavior profiles defined: Data Transfer, Data Management, and Data Archive –Many small corrections and enhancements based on usage feedback

WITSML Version 1.3 Highlights Improvements –Consistency: realtime and log objects –Tighter constraints on individual values –Mud log upgrades to handle time logs –Log enhanced to handle array data and multiple passes CompositeLog on a path to subsuming WellLogML

WITSML Version 1.3 Highlights Additions –Change notification –Composite object schema –New measure types with enumerated Unit of Measure values –Well datum capability –New risk object –Calculated path in Wellbore

5 th Public Seminar and SIG Working Meetings Held in Europe Venue: IFP, Paris, France Dates: Seminar, Nov. 4; Working Meetings Nov. 2-3 Oil Co. Presenters: BP, ChevronTexaco, Statoil, ExxonMobil Regulator: UK Service Co.: Schlumberger, Baker Hughes, Sense Intellifield, Paradigm, Geologix, Smith, US Synthetic, KSI, and Aspentech SIG updates on current and future work efforts. Next: May 24-26, Houston, Texas USA hosted by ChevronTexaco

WITSML SIG Membership Tops 30 Organizations The number of service and operator organizations making use of the WITSML Standards continue to grow. More have joined as SIG members. The SIG began ’04 with 17 members and ends ’05 with 31 members. Recent additions to the SIG include Total, US Department of the Interior, HRH Geological Services, Smith Technologies, IFP, Interaction, US Synthetic, Knowledge Systems, Aspentech.

Mud Log Sub-Team’s Work Evolves Into Formal Change Requests In Sep. ’03, it was agreed to review and enhance the mud log data specifications of WITSML. A sub-team, led by ExxonMobil, worked throughout ’04 leading to a set of change requests integrated into WITSML Version 1.3. ExxonMobil is leading a pilot project to test the mud logging work flow. Other organizations are invited to joint his pilot test or to organize tests of their own.

Version 1.3 On-Track for Year-End Release The previous release of the WITSML Standards was made in early ’03 as Version 1.2. In the fall of ’03, we set a target to release an enhancement version by year-end ’04. A list of issues was managed throughout the year. Individual issues were resolved as clarifications, minor fixes, or larger issues. By the fall WITSML meetings in Nov. ’04, almost all pending issues were resolved. The final review period for the SIG and the public will close at the end of Jan. ’05.

Well Path and Well Log Data Transfer Standards In early ’04, POSC stated the policy of integrating all data exchange standards in an extended family of WITSML Standards. One area of enhancement provides support for wellbore paths and trajectories – planned and actual – measurements and calculated results. A second area of enhancement extends support for well log data to include wireline as well as LWD.

Use Case and Requirements Team Looks to the Future At the WITSML meetings in Paris in Nov. 04, the following were identified as candidate future subjects. –Daily Drilling Reporting (BP, ChevronTexaco, and Hydro expressed interest) –Completions and Well Mechanical (ChevronTexaco has used a draft version of this; Statoil, ExxonMobil, and Hydro are interested) –HSE Reporting –Operational Data Reporting to ERP Systems –Distributed Temperature Surveys (underway as an IntOPS SIG effort)

Product Certification Program Will Start in Early ‘05 A Certification Program for POSC Standards is being beta-tested for WITSML enabled products. This is a self- certifying program, in which product vendors fill out a form indicating the nature of their product’s use of WITSML. Products in the program may use a special logo and the phrase, “POSC WITSML Certified Product” in literature and on packaging. A related program allows oil companies to be designated as Registered Users of the WITSML Standard.