Drilling Window Prediction and Real-Time Management: Getting It Right the First Time May 2015 Kuala Lumpur, Malaysia

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1 Drilling Window Prediction and Real-Time Management: Getting It Right the First Time SPE Forum Description Industry statistics show that for GOM wells in water depth over 3,000ft, between 45% and 48% of wells require a sidetrack. Of those, 50% require more than one sidetrack which means we are not getting it right the first time, all the time. Exploring and drilling wells in deep water and HPHT environments can carry the challenge of narrow operating drilling windows. Optimum mud weights and casing point selections are crucial for safe, efficient and cost-effective planning and drilling. It is important to analyse the challenges prior to drilling to ensure that robust plans and systems can be established. The ability to predict and manage the drilling window in real-time based on actual well data would significantly assist in reducing non-productive time (NPT) and optimising drilling. Achieving this, however, will require an integrated approach, potentially involving estimation of geomechanics, geology, stratigraphy, tectonics, and geophysics, employing LWD and other parameters in real-time to understand factors such as the following: Stress Magnitude and Direction Pore Pressure Formation Property and Anisotropy Mud Weight Window Time-Dependent Shale Stability Depletion-Induced Changes in Stress State This demands closer collaboration between well construction engineers, drilling engineers, rig site staff, geomechanicists, reservoir engineers and geoscientists. It will necessitate the validation and verification of data from the rig, geomechanical models and drilling window updates in real-time, as well as closer control of the drilling process and drilling fluid properties. Given the need for real-time management of the drilling window, some methods that can be used to optimise the window include: Real-Time Pore Pressure and Wellbore Stability Analysis Drilling Parameter and ECD Control Geosteering: Azimuth/Deviation Control Drilling Fluid Property/ Flowrate Control Drilling Fluid Weight and Salinity Management Wellbore Strengthening Managed Pressure Drilling This Forum will discuss what would be required to achieve the goal of predicting and managing the drilling window in-real-time. Topics will include real-time data acquisition and real-time geomechanical and other model updating requirements, collaborative ways of working between stakeholders and implementation of lessons learned. To Whom the Forum Will Appeal The Forum is a limited attendance meeting, designed for professionals in the oil and gas industry who are interested in pre-drilled and realtime updating of drilling windows, and implementing and expanding the current technologies to reduce non-productive time (NPT) and increase drilling efficiency. The forum is aimed at people whose principal job falls into any of the following categories: Well Engineers and Managers Production Technologists and Managers Well Technology Engineers and Managers Geoscientists and Managers Research and Development Scientists and Managers Petroleum Engineers and Managers Academics

2 Drilling Window Prediction and Real-Time Management: Getting It Right the First Time Forum Sessions Session Title Pre-Drilled Mud Weight Window and Well Trajectory Optimisation: 1-D vs 3-D/4-D Pre-Job Multi-disciplinary Planning and Contingency Data Acquisition for Real-time Wellbore Stability Monitoring and Model Updating Real-time Wellbore Stability Execution New Drilling Technology for Mitigating/Managing Wellbore Instability in Challenging Drilling Environments Innovations and Solutions from Lessons Learned Where Do We Go From Here? Session Chairpersons Norazan Kadir, PETRONAS; Chee Phuat Tan, Schlumberger Chee Phuat Tan, Schlumberger Steve Nas, Schlumberger Hasan Mousavi, Australian Drilling and Completion Co.; Sujit Kumar, Schlumberger Habil Akram, Halliburton; Chee Phuat Tan, Schlumberger Habil Akram, Halliburton; Chee Phuat Tan, Schlumberger Amitava Ghosh, Baker Hughes Pre-Drilled Mud Weight Window and Well Trajectory Optimisation: 1-D vs 3-D/4-D There has been huge change in the technology available since the early 1930s. Critical field investment and development decisions must be based on the best possible information, prediction, and intelligence gained from accurate and detailed modeling. The industry has realised the importance of geomechanics analysis and pore pressure prediction for well planning and field development planning. Pre-drilled geomechanics studies and pore pressure prediction can significantly reduce the risks and costs for drilling operation. This session will discuss the knowns and unknowns behind the geomechanical input, pre-drilled geomechanical approach for modeling mud weight window, 4D geomechanical modeling for infill well drilling, as well as the effect of depletion on the drilling window. Pre-Job Multi-disciplinary Planning and Contingency This session will focus on pre-job planning and implementation of contingency measures to maximise drilling efficiency and to ensure safety. Effective planning and contingency implementation can be achieved through knowledge sharing and propagating best practices into the well construction plan. This includes collaborative well planning workflow which incorporates a holistic solution for the optimum well construction process, well control planning with contingency for potential drilling hazards, and decision making and protocols for action implementation during drilling. It is critical to communicate the plan, as well as the hazards involved to all stakeholders both at the rig-site and monitoring centres to ensure that best practices are observed and preventable mistakes are avoided. Data Acquisition for Real-time Wellbore Stability Monitoring and Model Updating Without real-time data, there can be no real-time drilling window management but how much data, and what kind of data is necessary? Monitoring of influxes, cavings and drilling-induced fractures can provide unambiguous data-points, but no one would regard shutting in for a kick, or side-tracking due to hole-collapse as successful exercises in drilling window monitoring. This session will explore how far wellbore stability can be directly measured, how much we must trust in models we can infer, and how those models can be tested against real-time data. Different environments require different levels of data-acquisition operational aspects of surveillance, comparison with models and model updates, and the link with execution will also be covered. Finally, the issue of how to monitor the state of the entire open-hole section from shoe to bit will be discussed.

3 Drilling Window Prediction and Real-Time Management: Getting It Right the First Time Real-time Wellbore Stability Execution This session will discuss the execution methods that relate to wellbore stability in real-time. Parameters such as annular pressure measurement using a Pressure While Drilling (PWD) tool is one key component of real-time wellbore stability analysis because knowledge of the hydrostatic and circulating pressures is required to determine the magnitude of kicks, identify borehole ballooning events, monitor hole cleaning and collapse pressure of the wellbore. Information for use in constraining pore pressure and rock strength is provided by Logging While Drilling (LWD) resistivity, sonic velocity and bulk density. In addition, direct pore pressure measurements while drilling can provide critical data to calibrate pore pressure predictions in permeable formations even observations of cuttings shapes and volume can be important to identify the severity and cause of wellbore instability. Since the relationship between rock strength and log data is often poorly known, rig-site property measurements on cuttings are useful both to quantify the strength parameters and relate them to drilling experiences and observations while drilling. New Drilling Technology for Mitigating/Managing Wellbore Instability in Challenging Drilling Environments Drilling in challenging environments including ultra-deep water, high pressure-high temperature (HPHT), severely depleted reservoirs and troublesome shales can result in costly and at times, catastrophic wellbore instability. This session will address new drilling technology to mitigate or at least manage wellbore instability in such drilling environments including, but not limited to, managed pressure drilling and casing drilling solutions for narrow/non-existent stable drilling window, holistic solutions for time-dependent stability management of troublesome shales and wire pipe measurements for high speed real-time data transfer. The technology adoption will have the potential to effectively minimise wellbore instability which could impact the technical feasibility and economic viability of development fields in such drilling environments. Innovations and Solutions from Lessons Learned Lessons learned from drilling experience and failure of offset wells provide highly valuable information to develop innovations and creative solutions for mitigating or managing drilling problems in future planned wells. This is particularly critical for complex wells, drilling in challenging environments with very narrow or non-existence stable mud weight windows, and/or where there are large uncertainties in the subsurface rock properties, and in-situ stress and pore pressure conditions. For drilling of such wells or in such subsurface conditions, innovative solutions will likely be a prerequisite and dictate the success or failure of the wells. This session will focus on the utilisation of lessons learned for developing innovative solutions to mitigate or minimise wellbore instability which will in turn maximise drilling efficiency and success of complex wells drilled in challenging environments. Where Do We Go From Here? This session will focus on innovative technology development including, but not limited to, data acquisition, drilling process, product development, wellbore stability modelling and real-time monitoring and updating, which are key enablers to drill complex wells in challenging environments right the first time and every time. This requires creative thinking outside the box the required technology development ranges from ahead and around formation characterisation while drilling to downhole and rig-site rock properties measurement, drilling process and methodology, products and techniques to widen stable mud weight window, and quick accurate 3-D pre-drill and real-time wellbore stability model and updating.

4 Drilling Window Prediction and Real-Time Management: Getting It Right the First Time Registration Information To register, complete and return the Forum Registration Form in the brochure by 1 May Include enough information about your experience and knowledge to enable the SPE Forum Series Steering Committee to evaluate your potential contribution to the Forum. You will receive registration materials in April 2015, including detailed information on housing, transportation, and fees. Your registration form with full payment must be returned to SPE by 1 May 2015 to ensure your place in the Forum. Forum Registration Fee MYR 9, per person (inclusive of 6% Malaysian GST) on/before 17 April 2015 MYR 9, per person (inclusive of 6% Malaysian GST) after 17 April 2015 Includes the following for the Forum participant: - Registration to attend all the Forum sessions - Three nights hotel accommodation based on single occupancy - Welcome reception and dinner on Sunday - Breakfast on Monday through Wednesday - Lunch on Monday through Wednesday - Dinner on Monday - Daily coffee breaks Please note: Attendees are expected to attend the full Forum. The full fixed registration fee is charged regardless of the length of time a registrant attends the Forum. The base registration fee does not include accompanying persons. Details of accommodation and rates for spouses and family members will be sent with the registration packet that will be mailed to each delegate upon acceptance. The Forum Series Format The SPE Forum Series provides morning, afternoon, and evening sessions of short, scheduled and unscheduled presentations, with maximum time available for informal discussions and exchange of experience. To encourage the free interchange of information and ideas, SPE Forums are conducted off the record. Written papers are prohibited, and extensive note taking is not allowed. Mechanical recording of any portion of the Forum in any form (photographic, electronic, etc.) is prohibited. Information disclosed at a Forum may not be used publicly without the originator s permission. Participants are specifically requested to omit reference to Forum proceedings in any subsequent published work or oral presentation. A short written summary of major issues and consensus arising from the Forum may be prepared and distributed to attendees after the Forum at the discretion of the steering committee, and with appropriate SPE approval. To encourage maximum discussion, lengthy, formal presentations are discouraged. Presentations are usually limited to three or four slides. Breakout sessions for discussions in smaller groups are common. Participants are encouraged to come prepared to contribute their experience and knowledge, NOT to be spectators or students. To create a cohesive group in which discussion is free flowing, attendance at Forums is limited, and only registrants are allowed to attend sessions. To ensure opportunities for formal and informal discussions, all attendees are expected to attend every Forum session.

5 Forum Registration Form Please print or type Name (First) (Middle) (Last) SPE Member Number Check here if you are not an SPE member Job Title and Discipline Company Name Complete Mailing Address Telephone Number Fax Number Address IMPORTANT: List experience that qualifies you to attend this Forum and specify your expectations of this Forum. Use additional paper if required. Please identify your primary discipline from the six categories below. Drilling and Completions Health, Safety, Security, Environment and Social Responsibility Production and Operations Projects, Facilities and Construction Management and Information Technology Reservoir Description and Dynamics Do you wish to make a presentation about evolving and future technologies, issues, or challenges? Presentations are 5 to 10 minutes long, with only 3 or 4 slides. No professionally prepared visual aid may be used. Attach additional paper if required. Do you wish to present a poster? If so, please specify topic and provide brief description. The Poster Chairperson will notify you by telephone or if your poster is accepted. Note: Recording of any portion of the SPE Forum Series in any form (photographic, electronic, etc.) is strictly prohibited. Extensive note taking is forbidden. Printed reference to any SPE Forum discussion is not permitted without the consent of the parties involved. All participants are specifically requested to omit public reference to Forum proceedings in any published work or oral presentation. Registrants agree to attend ALL Forum sessions, and discuss and share with Forum participants their experiences and knowledge in the subject area, specifically in those areas of advanced technology in a given subject. Each participant agrees to the above regulations when application is submitted. Signature Date Submit this completed application by mail, fax, online, or . Do not send payment with this form. Mail: Registrar: SPE Forum Series Level 35, The Gardens South Tower Mid Valley City, Lingkaran Syed Putra Kuala Lumpur Malaysia Fax: spekl@spe.org Website:

6 SPE Forum Series Drilling Window Prediction and Real Time Management: Getting It Right the First Time Le Meridien Kuala Lumpur at KL Sentral May 2015 Kuala Lumpur, Malaysia REGISTRATION FORM Fee includes attending all Forum sessions, 3 nights accommodation with daily breakfast, Welcome Reception & Dinner on Sunday, Luncheons & coffee breaks and Dinner on Monday. (Registration fees shown inclusive of 6% GST) Registration fees: (Please select appropriate box) Single Occupancy Registration on/before 17 April 2015 Registration after 17 April 2015 MYR 9, MYR 9, Double Occupancy (includes spouse s breakfast & dinner and accommodation) MYR 10, MYR 10, PAYMENT OPTIONS Telegraphic Transfer (Bank details will be provided on the invoice) Payment by Credit Card (Credit card payment will be processed in US Dollars equivalent based on exchange rate specified on the registration website) American Express Diners Club MasterCard Visa Card Number Expiry Date (mm/yy) CVV Code CVV code is the 3 digit code on back of VISA/ MasterCard and the 4 digit code on the front of American Express Name as it appears on card Billing address of card Total Amount Zip/Postal code of card Signature Registration Policy Full fixed fee is charged regardless of the length of time that the registrant attends the Forum. Fixed fees cannot be prorated or reduced for anyone (Forum chairpersons, speakers, discussion leaders, or registrants). Forum is fully residential. Registrants are expected to attend all Forum sessions and are not permitted to attend on a partial basis. Cancellation policy A full refund less MYR processing fee will be charged for cancellation received before 3 May For cancellation received after 3 May 2015, 25% refund will be made to the registrant. No refund on cancellation received seven (7) days prior to the starting of the Forum date, on or after 10 May Substitutions will not be accepted without prior Steering Committee approval. NO refund will be issued if a registrant fails to show up at the Forum on site. In the event of the Forum being cancelled or rescheduled due to unforeseen circumstances, SPE will offer a full refund to registrants. Mail completed registration form with remittance and any supporting materials to: SPE Asia Pacific (M) Sdn. Bhd Level 35, The Gardens South Tower, Mid Valley City Lingkaran Syed Putra, Kuala Lumpur, Malaysia. Tel: Fax: E mail: spekl@spe.org