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Michael D. Lewan publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Michael D. Lewan sits on this spectrum.

38–42 publications: 1 scientists 43–47 publications: 0 scientists 48–52 publications: 3 scientists 53–57 publications: 8 scientists 58–62 publications: 11 scientists 63–67 publications: 16 scientists 68–72 publications: 24 scientists 73–77 publications: 31 scientists 78–82 publications: 49 scientists 83–87 publications: 77 scientists 88–92 publications: 86 scientists 93–97 publications: 88 scientists 98–102 publications: 92 scientists 103–107 publications: 84 scientists 108–112 publications: 102 scientists 113–117 publications: 108 scientists 118–122 publications: 117 scientists 123–127 publications: 126 scientists 128–132 publications: 146 scientists 133–137 publications: 114 scientists 138–142 publications: 102 scientists 143–147 publications: 127 scientists 148–152 publications: 102 scientists 153–157 publications: 112 scientists 158–162 publications: 102 scientists 163–167 publications: 127 scientists 168–172 publications: 121 scientists 173–177 publications: 112 scientists 178–182 publications: 109 scientists 183–187 publications: 98 scientists 188–192 publications: 92 scientists 193–197 publications: 105 scientists 198–202 publications: 77 scientists 203–207 publications: 80 scientists 208–212 publications: 89 scientists 213–217 publications: 70 scientists 218–222 publications: 74 scientists 223–227 publications: 74 scientists 228–232 publications: 70 scientists 233–237 publications: 67 scientists 238–242 publications: 59 scientists 243–247 publications: 67 scientists 248–252 publications: 51 scientists 253–257 publications: 46 scientists 258–262 publications: 41 scientists 263–267 publications: 39 scientists 268–272 publications: 34 scientists 273–277 publications: 39 scientists 278–282 publications: 35 scientists 283–287 publications: 36 scientists 288–292 publications: 35 scientists 293–297 publications: 29 scientists 298–302 publications: 23 scientists 303–307 publications: 39 scientists 308–312 publications: 34 scientists 313–317 publications: 23 scientists 318–322 publications: 18 scientists 323–327 publications: 18 scientists 328–332 publications: 21 scientists 333–337 publications: 20 scientists 338–342 publications: 15 scientists 343–347 publications: 13 scientists 348–352 publications: 24 scientists 353–357 publications: 25 scientists 358–362 publications: 10 scientists 363–367 publications: 20 scientists 368–372 publications: 17 scientists 373–377 publications: 18 scientists 378–382 publications: 15 scientists 383–387 publications: 7 scientists 388–392 publications: 22 scientists 393–397 publications: 9 scientists 398–402 publications: 11 scientists 403–407 publications: 16 scientists 408–412 publications: 4 scientists 413–417 publications: 5 scientists 418–422 publications: 14 scientists 423–427 publications: 8 scientists 428–432 publications: 7 scientists 433–437 publications: 7 scientists 438–442 publications: 10 scientists 443–447 publications: 10 scientists 448–452 publications: 3 scientists 453–457 publications: 9 scientists 458–462 publications: 11 scientists 463–467 publications: 4 scientists 468–472 publications: 6 scientists 473–477 publications: 11 scientists 478–482 publications: 8 scientists 483–487 publications: 2 scientists 488–492 publications: 3 scientists 493–497 publications: 4 scientists 498–502 publications: 4 scientists 503–507 publications: 4 scientists 508–509 publications: 4 scientists 510+ publications: 100 scientists
38 publications 510+

The last bar groups every scientist with 510 publications or more.

Michael D. Lewan D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Michael D. Lewan sits on this spectrum.

30 D-Index: 15 scientists 31 D-Index: 42 scientists 32 D-Index: 60 scientists 33 D-Index: 90 scientists 34 D-Index: 103 scientists 35 D-Index: 108 scientists 36 D-Index: 142 scientists 37 D-Index: 147 scientists 38 D-Index: 147 scientists 39 D-Index: 152 scientists 40 D-Index: 143 scientists 41 D-Index: 157 scientists 42 D-Index: 141 scientists 43 D-Index: 151 scientists 44 D-Index: 140 scientists 45 D-Index: 135 scientists 46 D-Index: 121 scientists 47 D-Index: 108 scientists 48 D-Index: 128 scientists 49 D-Index: 111 scientists 50 D-Index: 106 scientists 51 D-Index: 112 scientists 52 D-Index: 102 scientists 53 D-Index: 103 scientists 54 D-Index: 94 scientists 55 D-Index: 61 scientists 56 D-Index: 101 scientists 57 D-Index: 71 scientists 58 D-Index: 65 scientists 59 D-Index: 78 scientists 60 D-Index: 93 scientists 61 D-Index: 56 scientists 62 D-Index: 58 scientists 63 D-Index: 52 scientists 64 D-Index: 63 scientists 65 D-Index: 49 scientists 66 D-Index: 53 scientists 67 D-Index: 57 scientists 68 D-Index: 50 scientists 69 D-Index: 44 scientists 70 D-Index: 44 scientists 71 D-Index: 31 scientists 72 D-Index: 33 scientists 73 D-Index: 33 scientists 74 D-Index: 23 scientists 75 D-Index: 32 scientists 76 D-Index: 24 scientists 77 D-Index: 17 scientists 78 D-Index: 19 scientists 79 D-Index: 9 scientists 80 D-Index: 21 scientists 81 D-Index: 20 scientists 82 D-Index: 17 scientists 83 D-Index: 19 scientists 84 D-Index: 19 scientists 85 D-Index: 14 scientists 86 D-Index: 6 scientists 87 D-Index: 14 scientists 88 D-Index: 17 scientists 89 D-Index: 10 scientists 90 D-Index: 8 scientists 91 D-Index: 8 scientists 92 D-Index: 9 scientists 93 D-Index: 6 scientists 94+ D-Index: 98 scientists
30 D-Index 94+

The last bar groups every scientist with 94 D-Index or more.

Overview

Michael D. Lewan is affiliated with the United States Geological Survey in the United States. Their research spans multiple areas within engineering, environmental science, and agricultural and biological sciences, with a focus on hydrocarbon exploration and reservoir analysis, petroleum processing and analysis, and atmospheric and environmental gas dynamics.

The scientist has contributed notably to fields such as mechanics of materials, analytical chemistry, global and planetary change, environmental chemistry, and ocean engineering. Their research topics include methane hydrates and related phenomena, coal properties and utilization, biological control of invasive species, and botany, ecology, and taxonomy studies.

Lewan's recent publications reflect a broad engagement with geosciences and organic geochemistry. Notable papers include:

  • Trends in thermal maturity indicators for the organic sulfur-rich Eagle Ford Shale (2020), Marine and Petroleum Geology
  • Position-specific distribution of hydrogen isotopes in natural propane: Effects of thermal cracking, equilibration and biodegradation (2020), Geochimica et Cosmochimica Acta
  • Comment: Suppression of vitrinite reflectance by bitumen generated from liptinite during hydrous pyrolysis of artificial source rock by Peters et al. (2018) (2023), Organic Geochemistry
  • Thermal stability of freshwater fern Azolla biomarkers as assessed by hydrous pyrolysis (2025), Organic Geochemistry
  • Scanning electron microscopy of tight oil reservoirs before and after low-temperature hydrous pyrolysis, lower Permian Wolfcamp shale, Delaware Basin, Texas (2025), AAPG Bulletin

Their frequent coauthors include Katherine L. French, Justin E. Birdwell, Hao Xie, Camilo Ponton, and Michael J. Formolo, indicating collaborations across various sub-disciplines within Earth sciences and geochemistry.

Lewan has published primarily in the journals Organic Geochemistry, Marine and Petroleum Geology, Geochimica et Cosmochimica Acta, and AAPG Bulletin. These venues align with their research interests in organic geochemical processes, isotopic analysis, and reservoir characterization.

Best Publications

  • Experiments on the role of water in petroleum formation

    M.D. Lewan

  • Factors controlling the proportionality of vanadium to nickel in crude oils

    Unknown

  • Factors controlling enrichment of vanadium and nickel in the bitumen of organic sedimentary rocks

    Unknown

  • Generation of oil-like pyrolyzates from organic-rich shales.

    M. D. Lewan;J. C. Winters;J. H. Mcdonald

  • Evaluation of petroleum generation by hydrous phrolysis experimentation

    Unknown

  • Sulphur-radical control on petroleum formation rates

    Michael D. Lewan

  • D/H isotope ratios of kerogen, bitumen, oil, and water in hydrous pyrolysis of source rocks containing kerogen types I, II, IIS, and III

    Arndt Schimmelmann;Michael D. Lewan;Robert P. Wintsch

  • Effects of thermal maturation on stable organic carbon isotopes as determined by hydrous pyrolysis of Woodford Shale

    M.D Lewan

  • Comparison of petroleum generation kinetics by isothermal hydrous and nonisothermal open-system pyrolysis

    M.D. Lewan;T.E. Ruble

  • Formation temperatures of thermogenic and biogenic methane

    D.A. Stolper;M. Lawson;C.L. Davis;A.A. Ferreira

  • FTIR absorption indices for thermal maturity in comparison with vitrinite reflectance R0 in type-II kerogens from Devonian black shales

    Grzegorz P. Lis;Maria Mastalerz;Arndt Schimmelmann;Michael D. Lewan

  • Stable carbon isotopes of amorphous kerogens from Phanerozoic sedimentary rocks

    Unknown

  • Role of water in hydrocarbon generation from Type-I kerogen in Mahogany oil shale of the Green River Formation

    Michael D. Lewan;Stéphanie Roy

  • Organic acids in geological processes

    Edward D. Pittman;Michael D. Lewan

  • Role of NSO compounds during primary cracking of a Type II kerogen and a Type III lignite

    Françoise Behar;François Lorant;Michael Lewan;Michael Lewan

  • Effects of thermal maturation on steroid hydrocarbons as determined by hydrous pyrolysis of Phosphoria Retort Shale

    M.D Lewan;M Bjorøy;D.L Dolcater

  • Experimental investigation of changes in methane adsorption of bitumen-free Woodford Shale with thermal maturation induced by hydrous pyrolysis

    Haiyan Hu;Haiyan Hu;Tongwei Zhang;Tongwei Zhang;Jaclyn D. Wiggins-Camacho;Geoffrey S. Ellis

  • Petroleum generation and migration in the Mesopotamian Basin and Zagros Fold Belt of Iraq: results from a basin-modeling study

    Janet K. Pitman;Douglas Steinshouer;Michael D. Lewan

  • A thermal and chemical degradation approach to decipher pristane and phytane precursors in sedimentary organic matter

    Martin P Koopmans;W.Irene C Rijpstra;Mariëtte M Klapwijk;Jan W de Leeuw

  • New insights on the Green River petroleum system in the Uinta basin from hydrous pyrolysis experiments

    Tim E. Ruble;M. D. Lewan;R. P. Philp

  • Comparison of artificial maturation of lignite in hydrous and nonhydrous conditions

    F Behar;M.D Lewan;F Lorant;M Vandenbroucke

  • Experimental controls on D/H and 13C/12C ratios of kerogen, bitumen and oil during hydrous pyrolysis

    Arndt Schimmelmann;Jean-Paul Boudou;Michael D. Lewan;Robert P. Wintsch

  • Impact of dia- and catagenesis on sulphur and oxygen sequestration of biomarkers as revealed by artificial maturation of an immature sedimentary rock

    Martin P. Koopmans;Jan W. De Leeuw;Michael D. Lewan;Jaap S. Sinninghe Damste

  • Evaluation of the petroleum composition and quality with increasing thermal maturity as simulated by hydrous pyrolysis: A case study using a Brazilian source rock with Type I kerogen

    André L. D. Spigolon;André L. D. Spigolon;Michael D. Lewan;Henrique Luiz de Barros Penteado;Luiz Felipe C. Coutinho

Frequent Co-Authors

Maciej J. Kotarba
Maciej J. Kotarba AGH University of Science and Technology
Jaap S. Sinninghe Damsté
Jaap S. Sinninghe Damsté Royal Netherlands Institute for Sea Research
Jan W. de Leeuw
Jan W. de Leeuw International Soil Reference and Information Centre
John M. Eiler
John M. Eiler California Institute of Technology
Arndt Schimmelmann
Arndt Schimmelmann Indiana University
Alex L. Sessions
Alex L. Sessions California Institute of Technology
David Selby
David Selby Durham University
Stefan Schouten
Stefan Schouten Utrecht University
James R. Maxwell
James R. Maxwell University of Bristol
W. Irene C. Rijpstra
W. Irene C. Rijpstra Utrecht University

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