Investigations on CO2 migration and flow characteristics in sandstone during geological storage based on laboratory injection experiment and CFD simulation

Xie, Jingyu; Yang, Xianyu; Qiao, Wei; Yue, Ye; Qiu, Chen; Cai, Jihua; Jiang, Guosheng; Liu, Yifan

doi:10.1016/j.jgsce.2023.205058

Cited by 6 publications

(1 citation statement)

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“…Berrezueta conducted laboratory studies on carbon dioxide-brine-rock interactions and performed some sensitivity analyses [25]. Xie investigated the influence of geological and engineering parameters on CO 2 migration and flow characteristics through indoor injection experiments, supplemented by X-ray computed tomography (CT) and scanning electron microscopy (SEM) experiments and computational fluid dynamics (CFD) numerical simulations [26]. These experimental studies did not conduct real simulations under formation conditions and could not directly guide the project.…”

Section: Introductionmentioning

confidence: 99%

A Case Study on the CO2 Sequestration in Shenhua Block Reservoir: The Impacts of Injection Rates and Modes

Tang,

Ding,

Song

et al. 2023

Energies

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Carbon capture and storage (CCS) is the most promising method of curbing atmospheric carbon dioxide levels from 2020 to 2050. Accurate predictions of geology and sealing capabilities play a key role in the safe execution of CCS projects. However, popular forecasting methods often oversimplify the process and fail to guide actual CCS projects in the right direction. This study takes a specific block in Shenhua, China as an example. The relative permeability of CO2 and brine is measured experimentally, and a multi-field coupling CO2 storage prediction model is constructed, focusing on analyzing the sealing ability of the block from the perspective of injection modes. The results show that when injected at a constant speed, the average formation pressure and wellbore pressure are positively correlated with the CO2 injection rate and time; when the injection rate is 0.5 kg/s for 50 years, the average formation pressure increases by 38% and the wellbore pressure increases by 68%. For different injection modes, the average formation pressures of various injection methods are similar during injection. Among them, the pressure increases around the well in the decreasing injection mode is the smallest. The CO2 concentration around the wellbore is the largest, and the CO2 diffusion range continues to expand with injection time. In summary, formation pressure increases with the increase in injection rate and injection time, and the decreasing injection mode has the least impact on the increase in formation pressure. The CO2 concentration is the largest around the well, and the CO2 concentration gradually decreases. The conclusion helps determine the geological carrying capacity of injection volumes and provides insights into the selection of more appropriate injection modes. Accurate predictions of CO2 storage capacity are critical to ensuring project safety and monitoring potentially hazardous sites based on reservoir characteristics.

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Section: Introductionmentioning

confidence: 99%