Pore-scale mechanisms of the competition effects between temperature and solubility on the crude oil recovery during the CO2 huff-n-puff process

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

CO2 huff-n-puff technology has been acknowledged to enhanced oil recovery in tight reservoirs by improving mobility via dissolution. Temperature fluctuations induced on the reservoir depth have an impact altering dissolution and mobility. A microscopic visualization simulation experiment was carried out under 2 MPa condition observe interactions between crude at various temperatures (30, 45, 60, 75, 90 °C). The contribution of viscosity reduction competition temperature improvement thoroughly evaluated. findings showed that dramatically lowers 30–50 °C, facilitating Oil are reduced 8.2% as a result decreasing with increasing temperature, while volume gas increases 1.3 times. At 50–60 improves significantly when increment amplitude is about two times amplitude. Temperature-induced predominates 60 °C. Furthermore, dominated matrix region low (30–60 °C) fracture high (75–90 °C), both regions weighing more than 40% ultimate recovery. Therefore, suitable range °C extraction reservoirs.

Language: Английский

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2024, A Landmark Year for Climate Change and Global Carbon Capture, Utilization, and Storage: Annual Progress Review

Energy Science & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 4, 2025

ABSTRACT This annual review outlines the progress of carbon capture, utilization, and storage (CCUS) technologies in 2024. As human‐induced CO 2 emissions continued to rise, year presented critical challenges. Notably, 2024 was hottest on record first which global temperatures exceeded preindustrial levels by more than 1.5°C, driving intensified efforts advance CCUS. Scientific interest CCUS grew significantly, with number related publications increasing 11.4% compared 2023, reaching 53,970. The total operational commercial facilities also expanded, rising 16.3% a 50. In political area, governments introduced targeted policies accelerate adoption, focusing economic investment specific implementation requirements.

Language: Английский

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Mechanism and Formation Conditions of Foamy Oil During Gas Huff-n-Puff in Edge and Bottom Water Heavy Oil Reservoirs

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1127 - 1127

Published: April 9, 2025

The thermal development in heavy oil reservoirs with edge and bottom water is poor, while gas huff-n-puff shows a high recovery strong adaptability. formation of foamy during one the reasons for recovery. In order to determine factors affecting flow huff-n-puff, experiments using one-dimensional sandpack were conducted. influences drawdown pressure cycle number analyzed. conditions preliminarily clarified, enhanced (EOR) mechanism was revealed. experimental results show that are two important oil. Foamy prone forming under moderate 0.5–0.75 MPa, being too small or large unfavorable. more likely form first cycles, it becomes increasingly challenging increase number. These reflect necessary huff-n-puff: allowing adequately provide shear mixing generation micro-bubbles, other content should not be avoid inability disperse stabilize bubbles. oil, on hand, increases volume phase, reduces mobility phase slows down decline rate core, thereby enhancing driving force displacement. So, influence production declined by about 26%, average increased 4.5–6.9%.

Language: Английский

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Oriented conversion of low-value heavy oil to acetylene and hydrogen using pulsed spark discharge

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162956 - 162956

Published: April 1, 2025

Language: Английский

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Design of CO2 Huff-n-Puff Parameters for Fractured Tight Oil Reservoirs Considering Geomechanical Effects

Processes, Journal Year: 2024, Volume and Issue: 12(12), P. 2777 - 2777

Published: Dec. 6, 2024

CO2-Huff-n-Puff (CO2-HnP) is an effective method for improving oil recovery in conventional reservoirs and has been widely applied to tight reservoirs. Recently, there a series of studies published on the increase mechanism huff-n-puff parameter optimization CO2-HnP. However, understanding influence fracture characterization, threshold pressure gradient (TPG), geomechanical effects CO2-HnP fractured still limited. In this paper, numerical model based embedded discrete (EDFM) was constructed investigate impact TPG cumulative production (COP). The various parameters, including bottomhole pressure, rate, total CO2 injection amount, number cycles, timing transfer injection, time, soaking time COP replacement ratio were also explored paper. results include following: (1) led significantly reduced COP. (2) A positive correlation with found parameters such as while negative correlations rate. For ratio, rate positively correlated, amount cycles showed correlation. (3) With constant volume, it crucial avoid excessive that reduce On basis optimization, can be enhanced by advancing shortening extending time. findings help optimize strategies improve economic benefits from reservoir. This paper provides simulation reservoirs, which certain reference value.

Language: Английский

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The application prospect of biomass hydrogen-donors in steam-assisted oil recovery

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 110, P. 251 - 270

Published: March 1, 2024

Language: Английский

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