Preprint Article Version 1 This version is not peer-reviewed

Evaluation of effectiveness of CO2 sequestration in geological reservoir based on Unified Pipe-network Method

Version 1 : Received: 12 December 2019 / Approved: 13 December 2019 / Online: 13 December 2019 (10:48:44 CET)

A peer-reviewed article of this Preprint also exists.

Yan, X.; Sun, Z.; Li, S.; Yang, W.; Zhang, Y. Evaluation of Effectiveness of CO2 Sequestration Using Portland Cement in Geological Reservoir Based on Unified Pipe-network Method. Energies 2020, 13, 387. Yan, X.; Sun, Z.; Li, S.; Yang, W.; Zhang, Y. Evaluation of Effectiveness of CO2 Sequestration Using Portland Cement in Geological Reservoir Based on Unified Pipe-network Method. Energies 2020, 13, 387.

Journal reference: Energies 2020, 13, 387
DOI: 10.3390/en13020387

Abstract

The underground injection and geological sequestration of carbon dioxide (CO2) is a promising approach for reducing the levels of CO2 in the atmosphere. To mitigate the leakage of CO2 resulting from natural fracture networks in rock masses, the sequestration process is commonly accompanied by the injection of reactive Portland cement representing a coupled hydro-chemo-mechanical process. In this work, a numerical approach based on the unified pipe network method (UPM) is presented that considers the coupled permeation and diffusion processes with chemical precipitation. Most input parameters are derived from the published literature. The proposed approach is validated through a comparison with analytical solutions, which are applied to simulate the CO2 sequestration process in a fractured rock mass. The results indicate that the long-term sequestration effect, which is highly influenced by the fracture distribution, can be captured effectively by the model. Consequently, the presented approach can assist engineers in properly designing the arrangement of boreholes and determining the concentration of the grouting material.

Subject Areas

co$_2$ sequestration; multifield analysis; unified pipe-network method; reactive portland cement

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