Anisotropic Wellbore Stability Model for Drilling Through Challenged Environment
Gongrui YAN - Schlumberger
Wednesday, Oct 15th, 2014 6pm - 8pm
You must RSVP below!
Abstract:
A full anisotropic wellbore stability model and demonstrate its applications in drilling in challenging environment. Wells drilled through laminated rocks like shales, particularly highly deviated wells, are often less stable than similar wells drilled through non-laminated rocks. This can result in significant wellbore instability-related drilling problems that can increase drilling operation costs substantially.
In anisotropic rocks like highly laminated shales and fractured rocks, traditional approaches are no longer valid as borehole failure can occur along weak planes and fractures.
An anisotropic wellbore stability model in which the rock anisotropic elastic properties and anisotropic strength characteristic are incorporated has been developed to address wellbore instability mechanism in any laminated formations. Wellbore shear failure mechanism is modelled by a Modified Plane-of-Weakness Model to identify the onset of rock sliding along a weak plane and fracture. The active shearing effect is adopted to delineate whether the onset of sliding along weak planes or fractures at wellbore wall will develop and cause wellbore instability. The influences of laminated plane and fracture orientations as well as drilling experience are incorporated into the model. The model can predict the extent of failure region around the wellbore and subsequently provide mud weight window for safe and efficient drilling.
Biography:
Gongrui YAN is a principal engineer at Schlumberger. He has received a Ph.D degree of Hydraulic Engineering from Tsinghua University. He joined Schlumberger in 1997 as a project engineer working on software development. He has contributed on Schlumberger geomechanical software and applications development, as well as on geoscience and shale gas research projects. He is currently geomechanics domain architect at Schlumberger Beijing Geoscience Center in Beijing, China.
Where:
This event will be held at the Rosedale Hotel, Grand Ballroom.
Rosedale Hotel is located in No. 8 Jiang Tai Road West, Chaoyang District, Beijing
When:
Oct 15th, 2014
Cocktails at 6:00pm –
Dinner at 6:30pm –
Presentation at 7:00pm with Q&A afterward time permitting.
RSVP by 5pm Tuesday Oct 14th - Log in and RSVP below!
lzhang13@slb.com
Questions, please call Lei ZHANG @ 18600464356.
Members: 200RMB at the door or 150RMB if you RSVP to Lei ZHANG
Non-members: 300RMB at the door
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