Globally scalable geothermal energy production through managed pressure operation control of deep closed-loop well systems

AH Fallah, Q Gu, D Chen, P Ashok, E van Oort… - Energy Conversion and …, 2021 - Elsevier
Closed-loop geothermal systems (CLGS) have been recently proposed as an alternative to
the conventional enhanced geothermal system (EGS) concept to address many of the issues …

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 …

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 …

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 …

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 …

A novel dilution control strategy for gas kick handling and riser gas unloading mitigation in deepwater drilling

Q Gu, A Fallah, T Feng, S Bakshi, D Chen… - Journal of Petroleum …, 2021 - Elsevier
Non-aqueous drilling fluids are generally favored in risered deepwater drilling operations for
their capability to significantly improve drilling performance. However, their use may …

Gas in riser: On modeling gas influxes in non-aqueous drilling fluids with time-dependent desorption considerations

N Nwaka, C Wei, A Ambrus, Y Chen - Journal of Petroleum Science and …, 2020 - Elsevier
The presence of formation gas in a marine riser above the subsea blowout preventer
(SSBOP) can pose great risks to personnel, equipment, and the structural stability of the …

A data assimilation-based method for real-time monitoring and estimation of gas influx size and distribution during gas migration in a marine drilling riser

C Wei, Y Chen - Process Safety and Environmental Protection, 2025 - Elsevier
Effective well control is essential in marine drilling operations to prevent catastrophic
blowouts that endanger human lives and cause severe environmental damage, including …

A simplified two-phase flow model for riser gas management with non-aqueous drilling fluids

N Nwaka, C Wei, Y Chen - Journal of Energy …, 2020 - asmedigitalcollection.asme.org
Gas-in-riser events can lead to rapid unloading if not timely controlled in a proper manner.
When gas influx enters a wellbore with non-aqueous muds (NAMs), the ability of gas being …

Real-Time Casing Point Selection Optimization for MPD Wells Through Improved Kick Tolerance Analysis

S Callerio, P Ashok, E Oort - SPE/IADC Drilling Conference and …, 2024 - onepetro.org
Traditional casing point selection fails to reflect influx dynamics and leverage managed
pressure drilling (MPD) advancements in the well design process, which often leads to over …