Anisotropic Wellbore Stability Model for Transversely Isotropic Formation and Its Application in Drilling Through Shale Formation

2015 ◽  
Author(s):  
Y. H. Lu ◽  
M. Chen ◽  
Y. Jin ◽  
G. Chen ◽  
B. T. Lin ◽  
...  
Keyword(s):  
Transversely Isotropic ◽  
Wellbore Stability ◽  
Stability Model ◽  
Shale Formation

A Wellbore Stability Model for a Deviated Well in a Transversely Isotropic Formation Considering Poroelastic Effects

2016 ◽  
Vol 49 (9) ◽  
pp. 3671-3686 ◽  
Author(s):  
Ming Liu ◽  
Yan Jin ◽  
Yunhu Lu ◽  
Mian Chen ◽  
Bing Hou ◽  
...  
Keyword(s):  
Transversely Isotropic ◽  
Wellbore Stability ◽  
Stability Model

scholarly journals Investigation on influence of drilling unloading on wellbore stability in clay shale formation

2020 ◽  
Vol 17 (3) ◽  
pp. 781-796 ◽  
Author(s):  
Yi Ding ◽  
Xiang-Jun Liu ◽  
Ping-Ya Luo
Keyword(s):  
Wellbore Stability ◽  
Clay Shale ◽  
Shale Formation

scholarly journals Precise inversion of logged slownesses for elastic parameters in a gas shale formation

Geophysics ◽  
2012 ◽  
Vol 77 (4) ◽  
pp. B197-B206 ◽  
Author(s):  
Douglas E. Miller ◽  
Steve A. Horne ◽  
John Walsh
Keyword(s):  
Inclination Angle ◽  
Vertical Direction ◽  
Transversely Isotropic ◽  
Gas Shale ◽  
Elastic Parameters ◽  
Associated Production ◽  
Sonic Log ◽  
Inclination Angles ◽  
Shale Formation ◽  
Sonic Logs

Dipole sonic log data recorded in a vertical pilot well and the associated production well are analyzed over a [Formula: see text]-ft section of a North American gas shale formation. The combination of these two wells enables angular sampling in the vertical direction and over a range of inclination angles from 54° to 90°. Dipole sonic logs from these wells show that the formation’s average properties are, to a very good approximation, explained by a transversely isotropic medium with a vertical symmetry axis and with elastic parameters satisfying [Formula: see text], but inconsistent with the additional ANNIE relation ([Formula: see text]). More importantly, these data clearly show that, at least for fast anisotropic formations such as this gas shale, sonic logs measure group slownesses for propagation with the group angle equal to the borehole inclination angle. Conversely, the data are inconsistent with an interpretation that they measure phase slownesses for propagation with the phase angle equal to the borehole inclination angle.

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