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Charles Kang ResFrac

Charles A. Kang

Co-Founder and Chief Technology Officer

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Charles Kang is an engineer experienced in developing software tools for the modeling, optimization, and visualization of subsurface and energy systems.

Prior to ResFrac, he served as R&D Director at Tiandi Energy, an oilfield data services company. Charles received a PhD in energy resources engineering from Stanford University and a Bachelor of Science degree in engineering physics from UC Berkeley. Charles’s academic research is focused on the optimization of energy systems and hydraulic fracturing.

His awards include:

  • Hank Ramey Award for Outstanding Research and Service to the Department, Stanford Department of Energy Resources Engineering, 2014
  • Illich-Sadowsky Interdisciplinary Graduate Fellowship, Stanford Vice Provost for Graduate Education, 2012

Click here for a list of Charles’ publications.

Charles's posts

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Production impact of horizontal fractures

At the 2025 SPE International Hydraulic Fracturing Technology Conference, we (Dontsov, Zoback, McClure, and Fowler) presented “Hydraulic Fracture Propagation Along Bedding Planes Might Be More Prevalent Than We Think” (SPE-226637). The paper reviewed case studies with evidence of horizontal or bedding plane fractures from microseismic, fiber optics, core observations, and casing deformation.

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Testing the new Kryvenko model for proppant washout

What controls proppant placement during hydraulic fracturing? As described in Chapter 8 from McClure et al. (2025), ResFrac incorporates a variety of physical processes – viscous drag, gravitational settling, hindered settling, clustered settling, bed slumping, and more. In addition, ResFrac accounts for the complex physics associated with proppant flowing out of the wellbore (Dontsov, 2023; Ponners et al., 2025).

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