Underbalanced-Drilling Operation for Reservoir Characterization in Jebel Aswad Field, Oman: Case History

2008 ◽  
Author(s):  
Karthikeyan Nellayappan ◽  
John Riley ◽  
Paco Vieira ◽  
Dean Rambo ◽  
Keith Moyse ◽  
...  
Keyword(s):  
Case History ◽  
Reservoir Characterization ◽  
Drilling Operation ◽  
Underbalanced Drilling

North Sea reservoir characterization using rock physics, seismic attributes, and neural networks; a case history

1999 ◽  
Author(s):  
Joel D. Walls ◽  
M. Turhan Taner ◽  
Tom Guidish ◽  
Gareth Taylor ◽  
David Dumas ◽  
...  
Keyword(s):  
Neural Networks ◽  
North Sea ◽  
Case History ◽  
Reservoir Characterization ◽  
Rock Physics ◽  
Seismic Attributes

Reservoir Characterization during Underbalanced Drilling: Methodology, Accuracy, and Necessary Data

2002 ◽  
Author(s):  
Erlend H. Vefring ◽  
Gerhard Nygaard ◽  
Kjell Kåre Fjelde ◽  
Rolf Johan Lorentzen ◽  
Geir Nævdal ◽  
...  
Keyword(s):  
Reservoir Characterization ◽  
Underbalanced Drilling

Modeling the Pressure Transverse for Foam Drilling Operation in Vertical Well

2021 ◽  
Author(s):  
Adesina Fadairo ◽  
Gbadegesin Adeyemi ◽  
Kegang Ling ◽  
Vamegh Rasouli ◽  
Adedayo Iroko ◽  
...  
Keyword(s):  
Drill Pipe ◽  
Flow Region ◽  
Percentage Error ◽  
Drilling Operation ◽  
Underbalanced Drilling ◽  
Proposed Model ◽  
Hydraulic Design ◽  
Foam Drilling ◽  
Function Time

Abstract Pressure transverse in foam drilling operation is sensitive and difficult to predict particular at the start of flow that follows the unavoidable shut in due to inevitable procedure of stop and proceed arising from re-connection of additional drilling pipe to further drill depth. The practice in drilling may not enable the flow to attain steadiness flow region before running in the length of drill pipe. Most existing models in the literature for predicting pressure transverse in foam drilling operation only captured the steadiness flow region of the foam drilling operation by keeping out restriction terms induced by accumulation and kinetic for simplicity sake, hence unsteadiness flow region experienced during foam drilling operation was rarely modelled. It is highly expedient to derive a model that evident the unsteadiness region in order to accurately predict pressure transverse, hence sufficiently analyses the well stability during foam drilling operation. In this study, a model for forecasting pressure transverse in foam drilling operation was established considering restriction term caused by accumulation and kinetic that constitute for accurate formulation of hydraulic model that govern flow of foam during underbalanced drilling. By applying the proposed model to a case study reported in literature, pressure transverse at unsteadiness flow region for foam drilling operation can be quantitatively estimated and analyzed. The result obtained in a case study carried out indicates high variance in pressure as function time at the beginning of flow in foam drilling where unsteadiness is promoted before matching up closely with the results obtained from the existing Guo et al 2003 model at the steadiness flow region. The new model has a better accuracy with a percentage error of 0.74% and 6.4% as compared to previous models by Guo et al 2003. The proposed model make possible for drilling engineer to take decision with larger precision during hydraulic design of foam drilling operation and guaranteeing well stability in complex drilling system.

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