Consideration Of Compressibility Effects For Applied Back Pressure Dynamic Well Control Response To A Gas Kick In Managed Pressure Drilling
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Consideration Of Compressibility Effects For Applied Back Pressure Dynamic Well Control Response To A Gas Kick In Managed Pressure Drilling
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Author : William Alexander Bacon
language : en
Publisher:
Release Date : 2011
Consideration Of Compressibility Effects For Applied Back Pressure Dynamic Well Control Response To A Gas Kick In Managed Pressure Drilling written by William Alexander Bacon and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Managed Pressure Drilling (MPD) operations offer the ability to control a relatively small gas kick dynamically, without shutting in the well using blowout preventers. One currently employed method of dynamic well control uses applied-back-pressure to force flow exiting the wellbore to equal flow entering the drill-pipe, which is taken as an indication that the influx has stopped. However, for flow out equals flow in to imply influx cessation, the assumption of incompressibility of fluid in the wellbore is necessary. When fluid compressibility is appreciable, solely ensuring flow rate continuity does not necessarily imply influx cessation. The period of "dynamic well control" in an MPD operation- from the moment an influx is identified until the moment the influx is believed to have ceased- is examined in this work. A control volume mass balance with compressibility is used to analyze the system. This approach enables inclusion in flow calculations of the expansion or compression of in-situ influx gas within the wellbore. Since cessation of influx is the primary goal of dynamic well control, this work examines the transient, multiphase flow behavior in the annulus to explore limitations of the existing applied-back-pressure, dynamic, well control technique. It is shown that with the existing method, influx cessation does not always occur once flow out is constrained to equal flow in. It is also shown that in some situations where influx cessation is indeed achieved when flow out equals flow in, the back pressure applied at surface is higher than required to achieve influx cessation- i.e., influx ceases before the moment when flow out equals flow in. These outcomes are the consequence of the compressibility of the in-situ gas, and make the existing method unreliable in some critical situations of influx. A new applied-back-pressure, dynamic well control technique has been proposed, and a transient, multiphase flow analysis is used to identify pressure-based indicators of influx cessation. It is shown that time derivatives of pressure and pressure transfer carry the signature of well response for the given control strategy, and can be used to infer cessation of influx. It is argued that, taken together, these are more reliable indicators of influx cessation (and hence successful well control) than solely ensuring flow out equals flow in. Numerous transient, multiphase flow simulations have been conducted to support the key conclusions of this work.
Proceedings Of The International Field Exploration And Development Conference 2023
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Author : Jia’en Lin
language : en
Publisher: Springer Nature
Release Date :
Proceedings Of The International Field Exploration And Development Conference 2023 written by Jia’en Lin and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Numerical Evaluation Of Various Well Control Methods With Emphasis On Application In Managed Pressure Drilling Operation
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Author : Edgar Alexis Flores Barriguette
language : en
Publisher:
Release Date : 2020
Numerical Evaluation Of Various Well Control Methods With Emphasis On Application In Managed Pressure Drilling Operation written by Edgar Alexis Flores Barriguette and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Managed Pressure Drilling (MPD) is a modified drilling process designed to accurately manage the annular pressures of the wellbore with a combination of surface back pressure (SBP), flow rate and drilling mud density. MPD is designed to identify and circulate out kicks (uncontrolled flow of formation fluids into the wellbore) that possess blowout risk. Since MPD allows fast changes in the bottom hole pressure, the reaction to an undesirable inflow is not automatically to shut in the well and increase the density of the mud which is the well control procedure in conventional drilling. This feature of MPD can aid in lowering the non-productive time (NPT) as well as drilling related problems such as stuck pipe that results from well control operations. The objective of this research is to compare and evaluate the current conventional and MPD well control methods for gas kicks in a deepwater well. A total of seven well control methods are chosen from literature and subjected to an effectiveness criterion such as total time to control and circulate the kick, maximum pressures imposed on surface equipment and whether each well control method resulted in fracturing the formation at the casing shoe. Two different kick volumes (2 bbl and 10 bbl) with two different values of formation permeability (10 mD and 500 mD) and three different kick intensities (0.1 ppge, 0.5 ppge, 1.0 ppge) are chosen for kick scenarios in this study. The kick scenarios are selected to resemble realistic events that occur during drilling operations. In this study, only kicks resulting from drilling into a higher-pressure zone than expected are subjected to analysis. DrillbenchTM Dynamic Well Control simulator, is used in this research. A model validation, in terms of drilling hydraulics and rising gas velocities in the annuli, is included in this study to verify the reliability of the software's output. The validation is carried out using analytical relations and experimental correlations obtained from literature. The Bingham Plastic fluid model is used in the drilling hydraulics validation and the correlations suggested by Caetano (1985) and Hassan and Kabir (1992) are used for the verification of rising gas velocity in the annular space. In general, validation results show a reasonable agreement with the software's output. The results of 84 simulations showed that in the scenarios with low permeability, with both kick volumes and with the three different kick intensities, MPD well control methods were able to reduce the total well control time by more than 50% compared to the driller's method. ii Furthermore, in the same scenarios with high permeability, the MPD methods outperformed the driller's method in terms of time to stop the kick as well as maximum pressures imposed on surface equipment. The MPD well control method that combines Qin-SBP increments shows to have better results in terms of the total time to control and circulate the kick as well as lower imposed pressures in the casing shoe and surface equipment. This study can be used as a basis for further research in well control with MPD, with more attention to the method of combining Qin-SBP to stop the kick. Finally, this research can be used as a guide to determine the best combination of well control practices for wells with similar characteristics of the well studied in this thesis.
Safety And Reliability Assessment Of Managed Pressure Drilling In Well Control Operations
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Author : Idris Olusola Sule
language : en
Publisher:
Release Date : 2019
Safety And Reliability Assessment Of Managed Pressure Drilling In Well Control Operations written by Idris Olusola Sule and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Managed pressure drilling (MPD) is a technique utilized in drilling to manage annular pressure, hold reservoir influx, and divert mud returns away safely from the rig floor through a closed loop system. Thus, MPD plays key roles in well control operations and in drilling deepwater wells. However, despite the operational, safety, and economic benefits, limited information is available on understanding the complexity of MPD system. Furthermore, the oil and gas industry currently relies on a flow monitoring system for earlier kick detection but faces severe flaws and limited progress has been made on approach that monitors kick from downhole due to the complexity of offshore drilling operations. Thus, the main objective of this research is to assess the safety and reliability of MPD. In this research, following novel contributions have been made: several dynamic downhole drilling parameters have been identified to enhance earlier kick detection technique during drilling, including about 33 - 89% damping of bit-rock vibrations due to gas kick; a reliability assessment model has been developed to estimate the failure probability of an MPD system as 5.74%, the assess the increase in reliability of kick control operation increases from 94% to 97% due to structural modification of the MPD components, identify that MPD operational failure modes are non-sequential, and identify that an MPD control system is the most safety-critical components in an MPD system; an automated MPD control model, which implements a nonlinear model predictive controller (NMPC) and a two-phase hydraulic flow model, has been developed to perform numerical simulations of an MPD operation; and lastly, an integrated dynamic blowout risk model (DBRM) to assess the safety during an MPD operation has been developed and its operation involves three key steps: a dynamic Bayesian network (DBN) model, a numerical simulation of an MPD control operation, and dynamic risk analysis to assess the safety of the well control operation as drilling conditions change over time. The DBRM also implemented novel kick control variables to assess the success / failure of an MPD operation, i.e. its safety, and are instrumental in providing useful information to predict the performance of / diagnose the failure of an MPD operation and has been successfully applied to replicate the dynamic risk of blowout risk scenarios presented in an MPD operation at the Amberjack field case study from the Gulf of Mexico.
Pressure Control During Oil Well Drilling
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Author :
language : en
Publisher: Bookboon
Release Date :
Pressure Control During Oil Well Drilling written by and has been published by Bookboon this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Advanced Blowout Well Control
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Author : Robert D. Grace
language : en
Publisher: Gulf Professional Publishing
Release Date : 1994
Advanced Blowout Well Control written by Robert D. Grace and has been published by Gulf Professional Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Technology & Engineering categories.
Full text engineering e-book.
The Diagnosis Of Well Control Complications During Managed Pressure Drilling
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Author : Brian Piccolo
language : en
Publisher:
Release Date : 2013
The Diagnosis Of Well Control Complications During Managed Pressure Drilling written by Brian Piccolo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Design Development And Control Of A Managed Pressure Drilling Setup
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Author : Al Amin
language : en
Publisher:
Release Date : 2017
Design Development And Control Of A Managed Pressure Drilling Setup written by Al Amin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Drilling in challenging conditions require precise control over hydrodynamic parameters for safer and efficient operation in oil and gas industries. Automated managed pressure drilling (MPD) is one of such drilling solution which helps to maintain operational parameters effectively over conventional drilling technique. The main goal is to maintain bottomhole pressure between reservoir formation pressure and fracture pressure with kick mitigation ability. Real life MPD system has to confront nonlinearity induced by drilling fluid rheology and flow parameters. To obtain a better understanding of this operation, a lab scale experimental setup has been developed. Reynolds number and pressure drop per unit length were considered to obtain hydrodynamic similarity. A vertical concentric pipe arrangement has been used to represent the drill string and annular casing region. A linearized gain switching proportional integral (PI) controller and a nonlinear model predictive controller (NMPC) have been developed to automate the control operation in the experimental setup. A linearizer has been designed to address the choke nonlinearity. Based on the flow and pressure criteria, a gain switching PI controller has been developed which is able to control pressure and flow conditions during pipe extension, pump failure and influx attenuation cases. On the other hand, a nonlinear Hammerstein-Weiner model has been developed which assists in bottomhole pressure estimation using pump flow rate and choke opening. The identified model has been integrated with a NMPC algorithm to achieve effective control within predefined pressure and flow constraints. Lastly, a performance comparison has been provided between the linearized gain switching PI controller and NMPC controller.
Real Time Kick Estimation And Monitoring In Managed Pressure Drilling System
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Author : M. Musab Habib
language : en
Publisher:
Release Date : 2020
Real Time Kick Estimation And Monitoring In Managed Pressure Drilling System written by M. Musab Habib and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
The influx of reservoir fluid (kick) has a significant impact on drilling operations. Unmitigated kick can lead to a blowout causing financial losses and impacting human lives on the rig. Kick is an unmeasured disturbance in the system, and so detection, estimation, and mitigation are essential for the safety and efficiency of the drilling operation. Our main objective is to develop a real time warning system for a managed pressure drilling (MPD) system. In the first part of the research, an unscented Kalman filter (UKF) based estimator was implemented to simultaneously estimate the bit flow-rate, and kick. The estimated kick is further used to predict the impact of the kick. Optimal control theory is used to calculate the time to mitigate the kick in the best case scenario. An alarm system is developed based on total predicted influx and pressure rise in the system and compared with actual well operation control matrix. Thus, the proposed method can estimate, monitor, and manage kick in real time, enhancing the safety and efficiency of the MPD operation. So, a robust warning framework for the operators based on real life operational conditions is created in the second part of the research. Proposed frameworks are successfully validated by applying to several case studies.
A Simulation Based Evaluation Of Alternative Initial Responses To Gas Kicks During Managed Pressure Drilling Operations
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Author : Majid Davoudi
language : en
Publisher:
Release Date : 2009
A Simulation Based Evaluation Of Alternative Initial Responses To Gas Kicks During Managed Pressure Drilling Operations written by Majid Davoudi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.