Ultra-Deepwater Hydraulics and Well Control Tests with Extensive Instrumentation: Field Tests and Data Analysis

Rommetveit, Rolv; Bjorkevoll, Knut Steinar; Gravdal, Jan Einar; Gonçalves, Clemente; Lage, Antonio; Campos, Jose E.A.; Aragao, Atila Fernando Lima; Arcelloni, Alberto; Ohara, Shiniti

doi:10.2118/84316-ms

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…is used to relate the steady-state pressure drop to the acceleration term plus a frictional and gravitational source term. Further, the DynaFloDrill (Rommetveit et al, 2005) simulator is based on this approach, solving for 7 mass equations (for oil, water, gas, mud and cuttings) coupled to a static pressure balance where convective momentum terms are neglected.…”

Section: Reduced Drift Flux Modelmentioning

confidence: 99%

Review of two-phase flow models for control and estimation

Aarsnes

Flåtten

Aamo³

2016

Annual Reviews in Control

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Most model-based control and estimation techniques put limitations on the structure and complexity of the models to which they are applied. This has motivated the development of simplified models of gas-liquid two-phase flow in drilling for control and estimation applications. This paper reviews the literature for such models. The models are categorized in terms of complexity and the physical interpretation of the simplifications employed. A simulation study is used to evaluate their ability to qualitatively represent dynamics of 3 different gas-liquid scenarios encountered in drilling, based on which conclusions are drawn.

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Section: Reduced Drift Flux Modelmentioning

confidence: 99%

Review of two-phase flow models for control and estimation

Aarsnes

Flåtten

Aamo³

2016

Annual Reviews in Control

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“…The importance of dynamic surge pressures was originally developed by Lubinski and extended by several other authors [10][11][12][13][14] . The dynamic formulations have been extensively tested against field data and found to be accurate [15][16][17][18][19][20] . Dynamic surge models can now be used with reasonable confidence.…”

Section: Introductionmentioning

confidence: 99%

Surge Pressures in Low-Clearance Liners

Mitchell¹

2004

Proceedings of IADC/SPE Drilling Conference

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fax 01-972-952-9435. AbstractPressure surges have long been known to cause well-control problems. As early as 1934, pressure surges resulting from pipe swabbing were identified as a possible cause of fluid influx, and in extreme cases, blowouts, and lost-circulation problems. This paper fully describes the technical details for calculating dynamic surge pressures with high viscous forces in the low clearance liner annulus. Several sample problems of realistic low clearance liner runs are used to show the unusual pressure distributions developed by these cases. The potential problems running low clearance liners are examined, and possible solutions are presented.

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Drilltronics: An Integrated System for Real-Time Optimization of the Drilling Process

et al. 2004

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Drilltronics is the project name of a new and innovative system for drilling automation and simulation. The concept uses all available drilling data (surface and downhole) in real time to optimize the drilling process. If a sensor is failing (PWD for example) then advanced models mirroring the drilling process will calculate the parameter missing (pressure at the PWD sensor position). The system is composed of the following elements:Software modelling with algorithms that reflect the wellbore behaviour and its interaction with the drilling equipment. Currently under development are transient flow and heat transfer models, a drillstring torque and drag model, weight on bit optimization, and stick/slip analysis.The models are driven in real time by drilling data that are logged at high acquisition rate. The system is continuously calibrated through analysing the data with advanced filtering techniques.Real-time diagnosis of the drilling process is obtained from comparing measured data with model predictions. This makes up a basis for continuous adjustments to the drilling strategy.An integrated drilling simulator is developed by linking the modules together, and combining it with an ROP model. This can be used for pre-planning, sensitivity analysis during drilling, post-well analysis, and training objectives.Selected, critical sub-operations will be automated for fast and reliable reaction, e.g. automatic control of the drawwork based on dynamic surge and swab calculations, and automatic detection and first action after easily recognised symptoms on hole problems like pack off or stuck pipe. In order to realize the full potential of Drilltronics, surface and downhole drilling data must be available in real time. The drilling equipment will need to be computer controlled with an interface that supports automatic responses to the model's analysis. Introduction Other systems The oil industry has made significant progress in developing new facilities to improve the drilling operation and its technology. Examples are real-time formation evaluation, directional control while drilling, improved bottom hole assembly components, and improved drilling fluids. In the last few years, the request for real-time applications to improve performance and, at the same time, maintain safety for personnel and environments has increased related research activities. A historical view of the driller's role from the early start of the oil industry at the beginning of the twentieth century until today is given in [1]. The driller's role will need to evolve from one of basic drilling mechanics into that of real time drilling supervisor. This was emphasized when Havrevold and Hytten presented their Analysis-While-Drilling (AWD) in 1991 [2], one of the first real-time applications for drilling operations. At this time the increasing amount of available data from Measurement-While-Drilling tools (MWD) not only gave valuable information on many drilling conditions, but also enforced the need for a more efficient data handling. Based on relatively simple prediction models, the AWD concept included a real-time application with modules handling crucial parts of drilling operations such as standpipe pressure analysis and tripping optimization.

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Ultra-Deepwater Hydraulics and Well Control Tests with Extensive Instrumentation: Field Tests and Data Analysis

Cited by 4 publications

References 10 publications

Review of two-phase flow models for control and estimation

Review of two-phase flow models for control and estimation

Surge Pressures in Low-Clearance Liners

Drilltronics: An Integrated System for Real-Time Optimization of the Drilling Process

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