“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:
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:
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.
The Forum is a limited attendance meeting for up to 75 people, designed for professionals in the oil and gas industry who are interested in pre-drilled and real-time 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:
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