An Integrated Solution of Extended-Reach Drilling Problems in the Niakuk Field, Alaska: Part I - Wellbore Stability Assessment

1999 ◽  
Author(s):  
S.L. Dowson ◽  
S.M. Willson ◽  
L. Wolfson ◽  
G.G. Ramos ◽  
U.A. Tare
Keyword(s):  
Wellbore Stability ◽  
Stability Assessment ◽  
Extended Reach Drilling

First Managed Pressure Cementing with 7" Liner Overcoming a Challenging ERD Well Offshore Madura

2021 ◽  
Author(s):  
Galih Samudera ◽  
Hafidz Ali ◽  
Mohammad Zarir Bin Musa ◽  
Helmi Fauzi ◽  
Irwan Rubianto
Keyword(s):  
Pressure Profile ◽  
Wellbore Stability ◽  
Bottom Part ◽  
Wellbore Instability ◽  
Lost Circulation ◽  
Carbonate Formation ◽  
Execution Phase ◽  
Fractured Carbonate ◽  
Extended Reach Drilling ◽  
And Control

Abstract ZX is a development well located in offshore Madura, Indonesia. ZX is classified as an Extended Reach Drilling (ERD) well with 2.40 ERD ratio. ZX well is in KX field which known to have several drilling hazards. The formation has multiple lost circulation zones below the 9 5/8" casing shoe that is prone to total and partial losses due to combination depleted formation in the upper side and the nature of karst or fractured carbonate formation in middle and lower part of the interval. In addition, the bottom part of the hole section has problematic wellbore instability. These hazards lead to the necessity to closely monitor and control the pressure profile throughout the operation to find balance between loss circulation and wellbore stability to ensure an efficient and safe operation. An automated MPD system is used to precisely control bottom hole pressure. MPD system was used to drill 8-1/2" section of ZX well smoothly to target depth and geological objective was achieved without NPT. MPC was performed successfully for 7" liner cementing. This was the first MPC operation in offshore Madura and the application mitigated the loss circulation and avoided the unnecessary remedial cementing job. The paper will share the success story of MPD application in drilling narrow window ERD well in offshore Madura, Indonesia. It aims to describe the application of MPD for this specific ERD case from planning phase to execution phase as well as the lesson learned.

Geomaterial Characterization and Stability Assessment of Hydraulic Fill Dams

2021 ◽  
Vol 33 (2) ◽  
pp. 04020446
Author(s):  
Sayantan Chakraborty ◽  
Tejo V. Bheemasetti ◽  
Anand J. Puppala ◽  
Jasaswee T. Das ◽  
Santiago R. Caballero O
Keyword(s):  
Stability Assessment ◽  
Hydraulic Fill
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