Geomechanical Evaluation of CO2 Storage in a Coal Seam with a Secondary Barrier

Geomechanical Evaluation of CO2 Storage in a Coal Seam with a Secondary Barrier

Carbon dioxide

Transport properties

Flow of fluids

Coal

Coal deposits

Petroleum reservoir evaluation

Coal storage

Geomechanics

Geologic models

Geomechanical evaluation of CO2 underground disposal is complex and can be even more challenging in coal reservoirs due to natural fractures and combined effects of multi-component transport. The objective of the research work presented in this paper is to investigate the geomechanical response of the geologic system due to large-scale CO2 injection in a targeted coal reservoir. Field-scale geomechanical models were constructed to capture overall geologic response at an active site due to injection, and the results were compared with long-term field monitoring work. Coupled multiphase fluid flow and geomechanical models developed for the project site are capable to understand the CO2 transport behavior within the targeted reservoir and geologic layers above the targeted reservoir. Additionally, modeling efforts were carried out to investigate CO2 transport behavior and geomechanical response, if CO2 were to break through the seal layer into overburden formations. The combined results of geomechanical modeling and tiltmeter monitoring provide useful information on the migration of CO2. Modeling results show that a secondary coal seam above the targeted coal reservoir could potentially acts as a barrier in the presence of a CO2 leakage. 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

126

16th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2021, May 5, 2021 - May 8, 2021

2021

Siriwardane, Hema

Gondle, Raj

Jawad, Zainab

1026-1032

conferencePaper

23662557

10.1007/978-3-030-64518-2_122