The heat and mass transfer characteristics of superheated steam coupled with non-condensing gases in horizontal wells with multi-point injection technique

Sun, Fengrui; Yao, Yuedong; Li, Xiangfang

doi:10.1016/j.energy.2017.11.028

Cited by 199 publications

(47 citation statements)

References 35 publications

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“…There exists heat exchange between SHS in the IT and annuli (Sun et al 2018a). The energy balance equation of SHS flow in IT can be given as :…”

Section: Modeling Of Shs Flow In Itmentioning

confidence: 99%

“…The impulse of external force equals the change of SHS momentum (Sun et al 2018a). The momentum conservation equation can be given as :…”

Section: Modeling Of Shs Flow In Itmentioning

confidence: 99%

“…It is a variable mass flow process of SHS flow from toe point to heel point in annuli (Sun et al 2018a). The mass balance equation can be given as:…”

Section: Modeling Of Shs Flow In Annulimentioning

confidence: 99%

“…It is proved by field practices that conventional heelpoint steam injection technique may lead to serious fingering phenomenon (Sun et al 2018a;Wu et al 2012). Consequently, the alternative steam injection technique was proposed to overcome these shortcomings (Sun et al 2018a).…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the alternative steam injection technique was proposed to overcome these shortcomings (Sun et al 2018a). However, the mass and flow transfer characteristics of SNG in IT and annuli of the horizontal wellbores are quite complex (Sun et al 2018a). This paper has mainly three contributions to the existing body of the literature: (1).…”

Section: Introductionmentioning

confidence: 99%

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The heat and mass transfer characteristics of superheated steam in horizontal wells with toe-point injection technique

Sun

Yao

2018

J Petrol Explor Prod Technol

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Little efforts were done on the heat and mass transfer characteristics of superheated steam (SHS) flow in the horizontal wellbores. In this paper, a novel numerical model is presented to analyze the heat and mass transfer characteristics of SHS in horizontal wellbores with toe-point injection technique. Firstly, with consideration of heat exchange between inner tubing (IT) and annuli, a pipe flow model of SHS flow in IT and annuli is developed with energy and momentum balance equations. Secondly, coupled with the transient heat transfer model in oil layer, a comprehensive mathematical model for predicting distributions of pressure and temperature of SHS in IT and annuli is established. Then, type curves are obtained with numerical methods and iteration technique, and sensitivity analysis is conducted. The results show that (1). The decrease in SHS temperature in annuli caused by heat and mass transfer to oil layer is offset by heat absorbtion from SHS in IT. (2). SHS temperature in both IT and annuli increases with the increase in injection pressure. (3). IT heat loss rate decreases with the increases in injection pressure. (4). Increasing pressure can improve development effect. Keywords Superheated steam injection · Toe-point injection technique · Horizontal wellbores · Distributions of pressure and temperature · Heavy oil recovery List of symbols

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“…There exists heat exchange between SHS in the IT and annuli (Sun et al 2018a). The energy balance equation of SHS flow in IT can be given as :…”

Section: Modeling Of Shs Flow In Itmentioning

confidence: 99%

“…The impulse of external force equals the change of SHS momentum (Sun et al 2018a). The momentum conservation equation can be given as :…”

Section: Modeling Of Shs Flow In Itmentioning

confidence: 99%

“…It is a variable mass flow process of SHS flow from toe point to heel point in annuli (Sun et al 2018a). The mass balance equation can be given as:…”

Section: Modeling Of Shs Flow In Annulimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The heat and mass transfer characteristics of superheated steam in horizontal wells with toe-point injection technique

Sun

Yao

2018

J Petrol Explor Prod Technol

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Research on multi‐mechanism synergistic effects of gas cross‐scale percolation in tight gas reservoirs of Yanchang oilfield

Gao,

Bai,

Qiao

et al. 2024

Can J Chem Eng

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Revealing the gas transport patterns at the microscale and nanoscale is of great scientific and engineering significance for unconventional oil and gas exploration and development. This paper first systematically analyzes the properties of gas transport mechanism under different Knudsen number conditions. Second, the coupling modes of the cross‐scale multi‐drive mechanism are systematically categorized, and three typical coupling calculation methods are pointed out. Again, the rationality of the cross‐scale multi‐agency coupling is quantitatively calculated. The results show that (a) Under the influence of Fick's diffusion equation, when Knr > 0, the coupled ‘slip flow–Fick diffusion–Knudsen diffusion’ equation does not converge to the Knudson diffusion equation. (b) The ‘Fick diffusion–Knudsen diffusion’ coupled equation is calculated to be more than 102 times as large as the Knudsen diffusion equation.

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Research on microscale displacement characteristics of supercritical CO₂ fracturing in shale oil reservoirs

Dai

2024

Can J Chem Eng

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The great success of CO2 fracturing in shale oil reservoirs has not only increased the production capacity of shale oil, but also effectively carried out CO2 geological storage. In this paper, focusing on the microscale displacement characteristics of CO2 fracturing in shale oil reservoirs, first, the impact of oil saturation and gas invasion pressure on gas invasion is discussed. Then, the coupling control mode of oil saturation/pressure for various mechanisms of gas invasion is revealed. Results show that: (a) at lower displacement, the rock core has a lower initiation pressure and is fractured in a shorter period of time; (b) at higher displacement, the required fracturing time is longer and the fracturing pressure increases, but the fracturing effect is good and it is easy to form complex fracture networks; and (c) under higher pressure conditions, more complex fractures can be formed, which is beneficial for reservoir transformation and production improvement.

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The heat and mass transfer characteristics of superheated steam coupled with non-condensing gases in horizontal wells with multi-point injection technique

Cited by 199 publications

References 35 publications

The heat and mass transfer characteristics of superheated steam in horizontal wells with toe-point injection technique

The heat and mass transfer characteristics of superheated steam in horizontal wells with toe-point injection technique

Research on multi‐mechanism synergistic effects of gas cross‐scale percolation in tight gas reservoirs of Yanchang oilfield

Research on microscale displacement characteristics of supercritical CO₂ fracturing in shale oil reservoirs

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The heat and mass transfer characteristics of superheated steam coupled with non-condensing gases in horizontal wells with multi-point injection technique

Cited by 199 publications

References 35 publications

The heat and mass transfer characteristics of superheated steam in horizontal wells with toe-point injection technique

The heat and mass transfer characteristics of superheated steam in horizontal wells with toe-point injection technique

Research on multi‐mechanism synergistic effects of gas cross‐scale percolation in tight gas reservoirs of Yanchang oilfield

Research on microscale displacement characteristics of supercritical CO2 fracturing in shale oil reservoirs

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Product

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Research on microscale displacement characteristics of supercritical CO₂ fracturing in shale oil reservoirs