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Failure analysis of the tripping operation and its impact on well control
Citation
Abimbola, M and Khan, F and Garaniya, V and Butt, S, Failure analysis of the tripping operation and its impact on well control, ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering, 31 May - 05 June 2015, St. Johns, Newfoundland, Canada, pp. 1-10. ISBN 9780791856475 (2015) [Refereed Conference Paper]
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Copyright Statement
Copyright 2015 ASME
Official URL: http://proceedings.asmedigitalcollection.asme.org/...
DOI: doi:10.1115/OMAE2015-42245
Abstract
As the cost of drilling and completion of offshore well is
soaring, efforts are required for better well planning. Safety is
to be given the highest priority over all other aspects of well
planning. Among different element of drilling, well control is
one of the most critical components for the safety of the
operation, employees and the environment. Primary well
control is ensured by keeping the hydrostatic pressure of the
mud above the pore pressure across an open hole section. A loss
of well control implies an influx of formation fluid into the
wellbore which can culminate to a blowout if uncontrollable.
Among the factors that contribute to a blowout are: stuck pipe,
casing failure, swabbing, cementing, equipment failure and
drilling into other well. Swabbing often occurs during tripping
out of an open hole. In this study, investigations of the effects
of tripping operation on primary well control are conducted.
Failure scenarios of tripping operations in conventional
overbalanced drilling and managed pressure drilling are studied
using fault tree analysis. These scenarios are subsequently
mapped into Bayesian Networks to overcome fault tree
modelling limitations such s dependability assessment and
common cause failure. The analysis of the BN models
identified RCD failure, BHP reduction due to insufficient mud
density and lost circulation, DAPC integrated control system,
DAPC choke manifold, DAPC back pressure pump, and human
error as critical elements in the loss of well control through
tripping out operation.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | well control, failure analysis, tripping operation |
| Research Division: | Engineering |
| Research Group: | Maritime Engineering |
| Research Field: | Ocean Engineering |
| Objective Division: | Environment |
| Objective Group: | Natural Hazards |
| Objective Field: | Natural Hazards in Marine Environments |
| Author: | Garaniya, V (Dr Vikram Garaniya) |
| ID Code: | 99597 |
| Year Published: | 2015 |
| Deposited By: | NC Maritime Engineering and Hydrodynamics |
| Deposited On: | 2015-03-29 |
| Last Modified: | 2018-04-05 |
| Downloads: | 0 |
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