Development and Application of a Simulator for Simulating the Behaviors of a Geological System When Replacing CH 4 from Hydrate-Bearing Reservoirs by CO 2

Yan Li and Hailong Tian ()
Additional contact information
Yan Li: School of Science, Changchun University, Changchun 130022, China
Hailong Tian: Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China

Energies, 2023, vol. 16, issue 8, 1-19

Abstract: Conventional techniques for hydrate production may cause the deconstruction of hydrate, changing the geomechanical stresses of the reservoir, which could trigger the subsidence of the seafloor. A new method for replacing CH 4 from the hydrate lattice by CO 2 , without damaging the mechanical structure of sediment, has been proposed. This approach can achieve both the objectives of long-term CO 2 sequestration and the safe production of CH 4 from hydrates. By coupling the Chen-Guo model into Tough+Hydrate V1.5, an updated simulator CO 2 -EGHRSim V.10 (CO 2 Enhanced Gas Hydrate Recovery simulator) was developed in this work to describe the replacing processes of CH 4 from the hydrate lattice by CO 2 and to evaluate the storage potential of CO 2 and the recovery efficiency of CH 4 from the hydrate-bearing reservoirs. The developed simulator was verified using measured data obtained from laboratory experiments. The verification suggested that CO 2 -EGHRSim performed well in predicting the replacing processes of CH 4 with CO 2 . The simulator was applied to calculate the CO 2 storage potential combined with the CH 4 recovery from hydrates at the site of Iġnik Sikumi on the North Slope of Alaska. The simulated results indicated that the CO 2 –CH 4 exchange mostly occurred inside the gas plume, and the CO 2 hydrate was only present around the production well. The simulated CO 2 storage ratio was 0.58, and the CH 4 recovery efficiency was 25.95%.

Keywords: CO 2 geological storage; CO 2 -enhanced gas hydrate recovery; mixed-gas hydrate; CO 2 /N 2 –CH 4 exchange; simulator development (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/8/3342/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/8/3342/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:8:p:3342-:d:1119386

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().