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Subsurface Flow and Coupled Processes: Cross-Scale Lab Investigations and Capability Development

April 27, 2020 @ 10:00 am - 11:00 am

Chun Chang, Energy Geosciences Division, Lawrence Berkeley National Laboratory

What to Expect

Subsurface flow affected by thermal, mechanical, chemical and other processes is of great interest to geological CO2 sequestration, spent nuclear fuel and waste disposal, shale oil and gas recovery and geothermal energy production, etc. The processes can be complicated by the formation heterogeneity and anisotropy, inducing great uncertainties in modeling predictions. This talk will focus on (1) pore-scale supercritical CO2-brine displacement in 2D heterogeneous micromodels, including mass transfer and interfacial wetting effects; (2) core-scale fracture-matrix multiphase flow and interactions with X-ray CT imaging, and (3) bench-scale investigations of coupled THMC processes in engineered (clay) barrier systems. In addition, I will present lab capability development for rock creep behavior under controlled conditions of stress, temperature and aqueous geochemistry.

Speaker Bio

Dr. Chun Chang is currently a Postdoctoral Research Fellow in the Energy Geosciences Division at Lawrence Berkeley National Laboratory (LBNL). He received a Ph. D. in Hydrogeology from China University of Geosciences (Beijing) in the fall of 2016. From 2013 to 2015, he spent two years at LBNL and Pacific Northwest National Laboratory (PNNL) as a visiting student. Before joining LBNL, he was a Postdoctoral Research Fellow at China University of Mining and Technology (Beijing) from 2016 to 2017.

Dr. Chang’s primary research interests are experimental studies of reservoir processes and subsurface hydrology in porous and fractured media, including multiphase flow, phase dissolution and mass transfer, interfacial and wetting phenomena, rock mechanics and coupled THMC fundamentals. His experimental studies are motivated by the need to better understand processes controlling geological CO2 sequestration, spent nuclear fuel and waste disposal, shale gas & oil and geothermal energy production, and other energy and environment-related problems.


Tim Kneafsey