Analysis of Factors on Flue Gas Assisted SAGD Based on a 2D Visualization Physical Model

Wang, Zhuangzhuang; Lu, Teng; Li, Zhaomin; Wang, Fei; Li, Songyan; Chen, Hailong

doi:10.1021/acs.energyfuels.1c01304

Cited by 4 publications

(2 citation statements)

References 39 publications

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“…These included steam and gas push (SAGP), 7,14 combustion-assisted gravity drainage (CAGD), 15 multithermal fluid-assisted gravity drainage (MFAGD), 16 expanding solvent SAGD (ES-SAGD), 3,17,18 solvent-aided SAGD, 19−22 flue gas-assisted SAGD, etc. 23 Regarding the influence of these geological factors, the initial gas saturation and reservoir heterogeneity were discussed.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Uniform Steam Injection Method of Horizontal Wells during the SAGD Process in Heavy Oil Fields

Wang,

Liu,

Zhao

et al. 2023

Energy Fuels

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Uniform steam chamber expansion over the whole well length significantly affects the development of steam-assisted gravity drainage (SAGD) in oil reservoirs. Currently, most research is focused on optimizing the steam suction profile through the production wells. While uniform steam injection (USI) along horizontal wells is often neglected and studied in only a few reports, it is a critical technique to enhance oil recovery. Herein, a novel type of USI-SAGD process using an injector tube with variable density perforation was developed. The performance of USI-SAGD was evaluated based on a custom-built physical experimental setup and numerical simulation. The experimental findings demonstrate that the USI-SAGD method exhibits a more homogeneous steam injection profile by mitigating the accumulation of wellbore fluids and, thereby, making the steam injection profile more uniform. This resulted in a notable increase of 22.6% in the uniformity of steam chamber development and an 8.02% increase in oil recovery compared with the single-point SAGD method under identical experimental conditions. Numerical simulations indicate that USI-SAGD effectively regulates the outflow profile and mitigates the decrease in steam quality caused by steam overlay along the injector. As a result, the method achieves an even distribution of the pressure and steam quality, which corresponds to an improvement in steam injection uniformity. The perforating point number and distribution were optimized, which indicated an optimal critical value of 30 perforating points per 1000 m wellbore and a 4:6 distribution ratio for improving the uniformity of the steam chamber and enhancing the production performance in the horizontal well. This work proves that USI-SAGD is efficient in improving heavy oil production and has great potential for use in field applications.

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Section: Introductionmentioning

confidence: 99%

“…For example, several secondary solvent technologies were verified as enhancements to conventional SAGD. These included steam and gas push (SAGP), , combustion-assisted gravity drainage (CAGD), multithermal fluid-assisted gravity drainage (MFAGD), expanding solvent SAGD (ES-SAGD), ,, solvent-aided SAGD, − flue gas-assisted SAGD, etc …”

Section: Introductionmentioning

confidence: 99%

Study on the Uniform Steam Injection Method of Horizontal Wells during the SAGD Process in Heavy Oil Fields

Wang,

Liu,

Zhao

et al. 2023

Energy Fuels

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Technical transformation of heavy/ultra-heavy oil production in China driven by low carbon goals: A review

Xiong,

Guo,

Kiyingi

et al. 2024

Journal of Cleaner Production

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Influence of Temperature on the Adsorption and Diffusion of Heavy Oil in Quartz Nanopore: A Molecular Dynamics Study

et al. 2022

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The desorption of heavy oil is one of the important indicators affecting the development efficiency of the remaining oil in nanopores. However, the study of the adsorption and diffusion mechanisms of heavy oil molecules in nanopores remains scarce. In this work, the influences of temperature on the adsorption and diffusion properties of the heavy oil four-fractions in quartz nanopore have been investigated via molecular dynamics simulations. Our results show that the heavy oil molecules will form a denser multilayer adsorption oil layer on the nanopore surface, and high temperature can alter the adsorption behaviors of the heavy oil four-fractions. As the temperature increases, the saturate molecules are desorbed from the nanopore surfaces, but the aromatic, resin, and asphaltene molecules maintain a tendency to aggregate towards the nanopore surface. In particular, the agglomeration behaviors of most saturate, aromatic and asphaltene molecules in nanopore can be suppressed by the confined space compared with the heavy oil molecules in oil droplet. In addition, the influence of temperature on the movement of heavy oil molecules in nanopore decreases compared with the oil molecules in a heavy oil droplet due to the confined space and adsorption effect. Interestingly, there is a competition phenomenon between the adsorption and diffusion of aromatic, resin, and asphaltene molecules in the nanopore, resulting in different adsorption behaviors with the increase in temperature. The results obtained in this paper will provide molecular-level theoretical guidance for understanding the adsorption and desorption mechanisms of heavy oil in nanopores.

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Analysis of Factors on Flue Gas Assisted SAGD Based on a 2D Visualization Physical Model

Cited by 4 publications

References 39 publications

Study on the Uniform Steam Injection Method of Horizontal Wells during the SAGD Process in Heavy Oil Fields

Study on the Uniform Steam Injection Method of Horizontal Wells during the SAGD Process in Heavy Oil Fields

Technical transformation of heavy/ultra-heavy oil production in China driven by low carbon goals: A review

Influence of Temperature on the Adsorption and Diffusion of Heavy Oil in Quartz Nanopore: A Molecular Dynamics Study

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