Thomas Demchuk

Adjunct Professor

Bachelor's Degree: Geology 1983, University of Alberta (Edmonton), Department of Geology
Master's Degree: Geology 1987, University of Alberta (Edmonton), Department of Geology
PhD: Geology 1992, University of Calgary, Department of Geology and Geophysics

Telephone. 281-660-1491
Email: tdemchuk1@lsu.edu
Office: E225 Howe-Russell Geoscience Complex

Professional Background

2026-current, Senior Technical Manager-Geology, Gulf Companies, Houston, TX

2024-2026, Assistant Vice-President Geology, WSP USA Inc., Houston, TX

2020-2024, Business Development Manager, PetroStrat Inc., Houston TX

2015-2020, Business Development Manager, RPS Group Inc., Houston TX

1997-2015, Principal Stratigrapher, ConocoPhillips Ltd., Geoscience Upstream Technology

1992-1997, Biostratigrapher, Amoco Corp., Exploration and Production Technology

Research Interests

Palynology

  • Characterization of the PETM and general Paleogene of the U.S. Gulf Coast
  • Source-to-sink depositional understanding of the Wilcox Group
  • Chronostratigraphy and paleoproductivity of Albian-Maastrichtian strata in the Cretaceous Western Interior
  • Organic Petrography including characterization of organic matter in source rocks and source-rock reservoirs (unconventional resources)
  • Maturation assessment including vitrinite reflectance, spectral fluroescence and Raman spectroscopy integrated with organic geochemical data
  • General geology of underground injection control (UIC), carbon sequestration and geothermal resources

Selected Publications

  • Barbato, A.K., Armentrout, J.M. Magoon, L.B., Demchuk, T.D. and Warny, S. (2024) Organic geochemical characterization of Paleogene rock units in Coos Bay, Oregon: evaluation of kerogen type and richness in response to environmental changes. AAPG Bulletin, v. 108, pp. 1767-1798
  • Korasidis, V.S., Wing, S.L. Demchuk, T.D., Gravendyck, J., Harrington, G.J., Jardine, P. and Willard, D. (2023) New and important palynofloras from the Paleocene-Eocene transition of North America. Palynology, v.47, Article 2115159
  • Flaig, P.P., Denison, C.N., Ambrose, W.A. and Demchuk, T.D. (2022) Outcrop evidence for variations in channel-floodplain facies and stratal architectures across the Simsboro to Calvert Bluff transition, Wilcox Group, Butler, Texas. GCAGS Journal, v.22, pp. 83-103
  • Cedeno, A., Ohm, S., Escalona, A., Marin, D. Olaussen, S., and Demchuk, T. (2021) Upper Jurassic to Lower Cretaceous source rocks in the Norwiegan Barents Sea, part 1: Organic geochemical, petrographic and paleogeographic investigations. Marine and Petroleum Geology, v. 134, Article 105342 
  • Hackley, P.C..... Demchuk, T.D. et al. (2020) Testing reproducability of vitrinite and solid bitumen reflectance measurements in North American unconventional petroleum sysytems. Journal of Marine and Petroleum Geology. v. 114, pp 104-172
  • Demchuk, T.D., Denison, C.N. and O'Keefe, J.M.K. (2019) An integrated reevaluation of Wilcox/Carrizo stratigraphy, Bastrop County: Refined chronostratigraphy and revised paleoenvironments. Geologic Problem Solving with Microfossils, SEPM Special Publication No. 111, pp. 172-185