WITSML™ Drilling Standards Pemex 21 August 2008 Ciudad de México Alan Doniger, Energistics

Outline Background –Data Transfer Standards, XML, Web Services, WITS Overview Evolution [2000 – the present] Use –Energy companies, service/software companies Discussion 2

Background 3

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

5 What is WITSML ? WITSML is a framework for moving drilling data between rig and office-based computer systems. Context: –Internet –XML Schema –Web Services Openly available to all to implement. – – Hosted by Energistics –User community is the WITSML Special Interest Group

Pre-WITSML Situation (up to year 2000) Industry Real-time Data Centers operated in 1980s – Amoco – Chevron – Mobil WITS (Wellsite Information Transfer Standard) – Before the Internet, though it stood the test of time, it became dated. Differing approaches to WITS implementations fragmented interoperability. – Level 0 [Other levels rarely used] – 25 Record Types Statoil (late 1990s) – DART (Drilling Automation Real Time) Project Proprietary Systems

Slide 7 The Origin of WITSML DART evolved into a multi company effort – Statoil, BP, BakerHughes, Halliburton, Schlumberger to create a new standard, replacing WITS, – based on evolving internet technology, – with much improved functionality Improves “Plug and play” approach to moving data between systems For Operators, reduces costs for moving data, and improves competitiveness (Selecting vendors not driven by impact of IT changes, but on the service provided) For Contractors, reduces need to support different systems for different operators WITSML covers not only real-time data, but also contextual data

WITSML’s original goal The “right time” seamless flow of well site data between operators and service companies to speed and enhance decision-making. Domain: Drilling (from 2000), then Completions (from 2004), and then Well Services and Maintenance (from 2008)

Pre-WITSML Drilling Standards WITS –Designed, implemented, and established as an industry standard in the mid 1980s –A binary file format for transferring wellsite drilling data –No standard programming interface –Limited data objects –It was great for it’s time, but times have changed

Limitations of the WITS Standards Outdated MWD data records Restrictions on number of drill string and casing sections Inflexibility for handling data in different units of measure Very limited capacity for handling static well information Use of binary data formats is not computer platform independent WITS records are extensible but not self-describing Limited bi-directional (pull) capability No standard programming interface

WITS: Well Identification Record Type #23 11

WITS: Well Identification Record Type #23 12

WITS Compared With WITSML A WITSML Data Stream TEST 1 Depth DMEA 1.5 FT Measured Depth TIME S Time</curveDescription ACTC A WITS 0 Data Stream && 0201Operator Name 1-5a !! && 1401 Operator Name 1-5a !! 6

WITSML: Original Use Scenario

WITSML: Early History October 2000 – Initiation by BP and Statoil May Data Objects defined July 2001 – Working prototype August Wider industry awareness at SPE Forum + Austin workshop October Data standard design freeze January 2002 – Early commercial offering by the three major service companies and at least one other company [Baker Hughes, Halliburton, Schlumberger, Kongsberg]

WITSML: Early Architecture Web Based & W3C Standards –Wide area networking –Cross-platform XML data formats –Platform and language independent (Web Services) SOAP for Programming Interface –Web server based –Platform and language independent API Prototype in MS Visual BASIC

WITSML: Intended Early Deliverables Definition of Data Objects & Catalogs Example WITSML files Validation tool for WITSML files Example code to read and write simple WITSML data files Documentation

WITSML: Original Data Objects Well Wellbore Rig Rig Equipment Pump Location Units Trajectory Target Bit Record Bottom Hole Assembly Wellbore Geometry Casing Scheme Open Hole Daily Operations Fluids Report Cement Job Log Real Time Mud Logging