Research on heat transfer in geothermal wellbore and surroundings

Zhou, Fuzong

doi:10.14279/depositonce-3861

Cited by 3 publications

(1 citation statement)

References 89 publications

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“…When it comes to the fluids trapped in the annuli, the thermal resistance consists of two components in parallel. One component is the resistance caused by natural convection, which is calculated using the correlation provided by Zhou (2013). The other component is the resistance resulting from radiation between the solid surfaces, as suggested by Hasan and Kabir (1994).…”

Section: Problem Formulationmentioning

confidence: 99%

Laplace transform-based modeling of heat transfer in producing wellbores

Alves,

Barbosa

2023

J Braz. Soc. Mech. Sci. Eng.

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This paper presents a novel approach to modeling heat transfer in hydrocarbon-producing wells, aiming to simulate Annular Pressure Buildup (APB) in offshore wells. The proposed framework enhances traditional models by incorporating previously overlooked terms in pseudo-steady-state simulators. A Laplace transformation-based formulation of the governing differential equations is developed and solved to achieve better simulation results for shorter timespans. Two actual oilproducing wellbores are used for model validation. The first wellbore, a vertical well with the first annulus partially filled with N2, assesses the new formulation's performance compared to the traditional pseudosteady-state formulation. Additionally, a convergence test is conducted in this well to verify the level of additional computational complexity associated with the new formulation. Simulation results show that slower annuli heating leads to a slower APB, resulting in an 8 MPa difference in predicted pressurization. The second case, from a well undergoing an Extended Well Test, provides field data to simulate wellbore heating due to heat transfer from the production stream. A comparison of the new formulation with the field data demonstrates improved temperature representation within the first few days of production, with an average deviation of 4 K in predicted wellhead-produced fluid temperature.

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Section: Problem Formulationmentioning

confidence: 99%

Laplace transform-based modeling of heat transfer in producing wellbores

Alves,

Barbosa

2023

J Braz. Soc. Mech. Sci. Eng.

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A Numerical Study on the Thermal Behavior of Wellbores

Ferreira

Hafemann

Barbosa

et al. 2016

Day 2 Thu, September 15, 2016

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The thermal behavior of a deepwater well was simulated using an existing mathematical model in which a rigorous flow-pattern based multiphase flow model was employed to predict the pressure drop of the hydrocarbon stream. The heat transfer model relied on the energy equation for the hydrocarbon mixture and on a radial thermal resistance network between the wellbore and the formation. Different annulus convection and thermal formation models were evaluated. Production pressure and temperature results were compared with field data and with a commercial software package, showing good agreement with both. The model was able to capture important quantitative phenomena associated with the wellbore heat transmission (e.g., lithologic column and annulus fluid type). The simulations showed that for short production times the heat transfer to the formation was significantly influenced by the wellbore thermal resistances, namely the cement sheaths and the nitrogen present in the production annulus. As the production time increased, the formation became the dominant thermal resistance. The mathematical model was capable of handling real production scenarios, such as the impact of a watercut time-dependent behavior on the temperature distribution in the wellbore.

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Laplace Transform-Based Modeling of Heat Transfer in Producing Wellbores

Alves,

Barbosa

2023

Preprint

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This paper presents a novel approach to modeling heat transfer in hydrocarbon-producing wells, aiming to simulate Annular Pressure Buildup (APB) in offshore wells. The proposed framework enhances traditional models by incorporating previously overlooked terms in pseudo-steady-state simulators. A Laplace transformation-based formulation of the governing differential equations is developed and solved to achieve better simulation results for shorter timespans. Two actual oil-producing wellbores are used for model validation. The first wellbore, a vertical well with the first annulus partially filled with N2, assesses the new formulation's performance compared to the traditional pseudo-steady-state formulation. Additionally, a convergence test is conducted in this well to verify the level of additional computational complexity associated with the new formulation. Simulation results show that slower annuli heating leads to a slower APB, resulting in an 8 MPa difference in predicted pressurization. The second case, from a well undergoing an Extended Well Test, provides field data to simulate wellbore heating due to heat transfer from the production stream. A comparison of the new formulation with the field data demonstrates improved temperature representation within the first few days of production, with an average deviation of 4 K in predicted wellhead-produced fluid temperature.

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Research on heat transfer in geothermal wellbore and surroundings

Cited by 3 publications

References 89 publications

Laplace transform-based modeling of heat transfer in producing wellbores

Laplace transform-based modeling of heat transfer in producing wellbores

A Numerical Study on the Thermal Behavior of Wellbores

Laplace Transform-Based Modeling of Heat Transfer in Producing Wellbores

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