Review of two-phase flow models for control and estimation

UJF Aarsnes, T Flåtten, OM Aamo - Annual Reviews in Control, 2016 - Elsevier
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 …

The modeling of two-way coupled transient multiphase flow and heat transfer during gas influx management using fiber optic distributed temperature sensing …

C Wei, JL Tabjula, J Sharma, Y Chen - … Journal of Heat and Mass Transfer, 2023 - Elsevier
Effective management of gas influxes during drilling for either oil-gas or geothermal wells is
crucial for ensuring operational safety and minimizing non-productive times, especially for …

The WAF scheme for the isentropic drift-flux model of compressible two-phase flows

S Ouffa, D Zeidan, D Seba - Computers & Fluids, 2021 - Elsevier
This paper focuses on the extension of the Weighted Average Flux (WAF) scheme for the
numerical simulation of two-phase gas–liquid flow by imposing velocity equilibrium and …

A novel data assimilation-based real-time state estimation method for gas influx profiling during riser gas events

C Wei, JL Tabjula, J Sharma… - Journal of Energy …, 2023 - asmedigitalcollection.asme.org
Riser gas events during offshore drilling operations are hazardous and challenging to
control. Therefore, knowledge of the gas influx sizes and distributions in a marine drilling …

Computationally efficient simulation of non-isothermal two-phase flow during well construction using a new reduced drift-flux model

Q Gu, AH Fallah, A Ambrus, T Feng, D Chen… - Applied Thermal …, 2022 - Elsevier
Two-phase flow modeling is important in well construction field for well planning and real-
time applications. In this paper, a new non-isothermal two-phase flow model is presented …

On improving algorithm efficiency of gas-kick simulations toward automated influx management: a Robertson differential-algebraic-equation problem approach

C Wei, Y Chen - SPE Drilling & Completion, 2021 - onepetro.org
Improved numerical efficiency in simulating wellbore gas-influx behaviors is essential for
realizing real-time model-prediction-based gas-influx management in wells equipped with …

Temperature dynamics and its effects on gas influx handling during managed pressure drilling operations

AH Fallah, Q Gu, Z Ma, AK Vajargah, D Chen… - Journal of Natural Gas …, 2020 - Elsevier
Abstract With Managed Pressure Drilling (MPD) becoming increasingly important to oil and
gas well construction, there has been a growing demand for comprehensive models that can …

Real-time estimation of reservoir influx rate and pore pressure using a simplified transient two-phase flow model

A Ambrus, UJF Aarsnes, AK Vajargah, B Akbari… - Journal of Natural Gas …, 2016 - Elsevier
The ability to perform accurate pore pressure and reservoir inflow estimation during a kick
incident is necessary, particularly when drilling in formations with narrow pressure margins …

Modeling and numerical implementation of managed-pressure-drilling systems for the assessment of pressure-control systems

SN Lordejani, MH Abbasi, N Velmurugan… - SPE Drilling & …, 2020 - onepetro.org
Automated managed‐pressure drilling (MPD) is a method to enhance downhole pressure‐
control performance and safety during drilling operations. It is becoming more common to …

Gas kicks in non-aqueous drilling fluids: a well control challenge

Z Ma, AK Vajargah, D Chen, E Van Oort… - SPE/IADC Drilling …, 2018 - onepetro.org
Non-aqueous drilling fluids (such as synthetic-based mud) are frequently used to drill one or
more sections of an oil/gas well to reduce drilling problems such as shale sloughing …