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SPE Drilling Window Prediction and Real-Time
Management: Getting It Right the First Time

17 – 20 May 2015 :: Kuala Lumpur, Malaysia

Technical Agenda

Pre-Drilled Mud Weight Window and Well Trajectory Optimisation: 1-D vs 3-D/4-D

Session Chairpersons: Norazan Kadir, PETRONAS; Chee Phuat Tan, Schlumberger

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

Session Chairperson: Chee Phuat Tan, Schlumberger

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

Session Chairperson: Steve Nas, Schlumberger

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.

Real-time Wellbore Stability Execution

Session Chairpersons: Hasan Mousavi, Australian Drilling and Completion Co.; Sujit Kumar, Schlumberger

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 Part I & II

Session Chairpersons: Habil Akram, Halliburton; Chee Phuat Tan, Schlumberger

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

Session Chairpersons: Habil Akram, Halliburton; Chee Phuat Tan, Schlumberger

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?

Session Chairperson: Amitava Ghosh, Baker Hughes

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.