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Timothy Kneafsey P.E., Ph.D. is a Geological Scientist, Mechanical Engineer in the Energy Geosciences Division at Lawrence Berkeley National Laboratory (Berkeley Lab) and the Head of the Hydrocarbon Resources Program. He performs laboratory and field experimental studies on a variety of topics including heat transfer and mass transport in fractured and porous rock; measures hydrological, geophysical, and geomechanical properties of hydrate-bearing sediments and supercritical CO2-bearing rock; probes transport of acid gases in geothermal systems; visualizes fluids (liquid and gas) flow through coal and rock while simultaneously measuring geophysical properties related to coal-bed methane and CO2 sequestration; and investigates issues related to CO2 sequestration including CO2-induced density driven brine advection. Dr. Kneafsey has used a variety of visualization tools in his investigations including direct and differential imaging, spatially resolved infrared thermometry, and x-ray CT scanning, and has a patent for a CT scanner design. Dr. Kneafsey holds Bachelor of Science degrees in Mechanical and Civil Engineering from the University of New Mexico, a Masters of Science degree in Civil Engineering from the University of California at Berkeley, and a Doctorate in Civil and Environmental Engineering, also from the University of California at Berkeley. He is a registered Civil Engineer in California.
Carl Steefel is a Senior Scientist in the Energy Geosciences Division, Earth and Environmental Sciences Area at Berkeley Laboratory. He also serves as head of the Geochemistry Department. He has more than 30 years of experience in developing models for multicomponent reactive transport in porous media and applying them to topics in water-rock interaction, reactive contaminant transport, chemical weathering, isotopic exchange, and watershed modeling. Recent work has focused on modeling of geochemical transport and electrostatic effects in clay-rich rocks. He is the principal developer of the CrunchFlow software, which won an R&D100 Award in 2017 and was named an AGU Fellow in 2019.
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