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{{Short description|German geophysicist (1927–2019)}}
{{Userspace draft|source=ArticleWizard|date=July 2019}}

{{Infobox scientist
{{Infobox scientist
| name = Reinhard Bortfeld
| name = Reinhard Bortfeld
| image = Reinhard Bortfeld 2007.jpg
| caption= Bortfeld in 2007
| nationality = German
| nationality = German
| fields = Geophysics
| fields = Geophysics
Line 9: Line 10:
| workplaces = {{ublist | [[Mobil Oil|Mobil Oil A.G.]] | [[:de:Prakla-Seismos|Prakla-Seismos]] | [[Royal Dutch Shell]] |[[Clausthal University of Technology]]}}
| workplaces = {{ublist | [[Mobil Oil|Mobil Oil A.G.]] | [[:de:Prakla-Seismos|Prakla-Seismos]] | [[Royal Dutch Shell]] |[[Clausthal University of Technology]]}}
| known_for = {{ublist | Bortfeld approximation | geometrical ray theory }}
| known_for = {{ublist | Bortfeld approximation | geometrical ray theory }}
| birth_date = 25 February 1927
| birth_date = {{birth date|1927|2|25|df=y}}
| birth_place = [[Belgern]]
| birth_place = [[Belgern]]
| death_date = 10 July 2019
| death_date = {{death date and age|2019|7|10|df=y|1927|2|25}}
| death_place = [[Hannover]]
| death_place = [[Hannover]]
}}
}}
__NOTOC__
__NOTOC__
'''Reinhard Bortfeld''' (25 February 1927 - 10 July 2019) was a German geophysicist.
'''Reinhard Bortfeld''' (25 February 1927 – 10 July 2019) was a German geophysicist.


== Life ==
== Life ==
Bortfeld grew up in [[Annaburg]] in [[Saxony-Anhalt]], Germany. After World War II he came to [[Göttingen]] where he studied [[Mathematics]], graduated with a [[Staatsexamen]] in 1950, and completed his [[:en:Doctor of Philosophy|Ph.D.]] in 1951. He worked for many years as a geophysicist in the industry: from 1952 until 1962 at [[Mobil Oil|Mobil Oil A.G.]] in [[Celle]], then until 1975 at [[:de:Prakla-Seismos|Prakla-Seismos]] in [[Hannover]], and finally until 1980 at [[Royal Dutch Shell]] in [[The Hague]], Netherlands. In 1980 he became a full professor and Director of the Institute of Geophysics at the [[Clausthal University of Technology]], Germany. He retired and became professor emeritus in 1992<ref name=Hubral_eulogy>{{cite web|title=Reinhard Bortfeld|periodical=Biography Citation for the Reginald Fessenden Award|publisher=Society of Exploration Geophysicists Wiki|url=https://wiki.seg.org/wiki/Reinhard_Bortfeld|deadurl=|format=|accessdate=|archiveurl=|archivedate=|last=Peter Hubral|date=|year=|month=|day=|language=en|pages=|quote=}}</ref><ref name=Hubral2002>{{citation|surname1=Peter Hubral|editor-surname1= European Association of Geoscientists and Engineers|title=Reinhard Bortfeld, Reflections Seismics|edition=Reprint Series No. 1|isbn=90-73781-22-1|date=2002|language=German
Bortfeld grew up in [[Annaburg]] in [[Saxony-Anhalt]], Germany. After World War II he came to [[Göttingen]] where he studied [[Mathematics]], graduated with a [[Staatsexamen]] in 1950, and completed his [[:en:Doctor of Philosophy|Ph.D.]] in 1951. He worked for many years as a geophysicist in the industry: from 1952 until 1962 at [[Mobil Oil|Mobil Oil A.G.]] in [[Celle]], then until 1975 at [[:de:Prakla-Seismos|Prakla-Seismos]] in [[Hannover]], and finally until 1980 at [[Royal Dutch Shell]] in [[The Hague]], Netherlands. In 1980 he became a full professor and director of the Institute of Geophysics at the [[Clausthal University of Technology]], Germany. He retired and became professor emeritus in 1992.<ref name=Hubral_eulogy>{{cite web|title=Reinhard Bortfeld|periodical=Biography Citation for the Reginald Fessenden Award|publisher=Society of Exploration Geophysicists Wiki|url=https://wiki.seg.org/wiki/Reinhard_Bortfeld|format=|accessdate=|archiveurl=|archivedate=|last=Peter Hubral|date=|year=|language=en|pages=|quote=}}</ref><ref name=Hubral2002>{{citation|surname1=Peter Hubral|editor-surname1= European Association of Geoscientists and Engineers|title=Reinhard Bortfeld, Reflections Seismics|edition=Reprint Series No. 1|isbn=90-73781-22-1|date=2002|language=German
}}</ref><ref>{{cite web|title=Institutsgeschichte|periodical=|publisher=Institut für Geophysik TU Clausthal|url=https://www.ifg.tu-clausthal.de/institutgeschichte/|deadurl=|format=|accessdate=|archiveurl=|archivedate=|last=|date=|year=|month=|day=|language=de|pages=|quote=}}</ref>. In 1960 Bortfeld married Monika Bortfeld, with whom he has a son, Thomas, and a daughter, Julia.
}}</ref><ref>{{cite web|title=Institutsgeschichte|periodical=|publisher=Institut für Geophysik TU Clausthal|url=https://www.ifg.tu-clausthal.de/institutgeschichte/|format=|accessdate=|archiveurl=|archivedate=|last=|date=|year=|language=de|pages=|quote=}}</ref> In 1960 Bortfeld married Monika Bortfeld, with whom he has a son, Thomas, and a daughter, Julia.


== Work in geophysics ==
== Work in geophysics ==
With his mathematical approach to solve problems of [[exploration geophysics]], Bortfeld has had long lasting impact, in particular on the field of [[reflection seismology]]. He is primarily known for the ''Bortfeld approximation'' <ref>R. Bortfeld: ''Approximations to the reflection and transmission coefficients of plane longitudinal and transverse waves'', Geophysical Prospecting, 1961, v.9 no. 4, 485–503.</ref><ref>{{cite web|title=Bortfeld equation|periodical=Encyclopedia of Subsurface Science|[http://subsurfwiki.org Subsurface Wiki]|publisher=|url=http://subsurfwiki.org/wiki/Bortfeld_equation|deadurl=|format=|accessdate=|archiveurl=|archivedate=|last=|date=|year=|month=|day=|language=en|pages=|quote=}}</ref> of the [[Zoeppritz equations|Zöppritz equations]], which facilitated a physical interpretation of the reflection coefficients of [[Seismic wave|seismic waves]]. He has been considered as the father of the [[amplitude versus offset]] method<ref name=Hubral_eulogy />, which, after further developments, has played a crucial role for the detection of economically useful geological deposits. Heading the data processing center at Prakla-Seismos<ref>{{cite web|title=Organisation PRAKLA 1. Januar 1969|periodical=Prakla Seismos Rundschau Heft 34|publisher=PRAKLA Gesellschaft für praktische Lagerstättenforschung GmbH|url=http://www.diehl-net.com/Download/Rundschau/OCR/Rundschau_1969_34.pdf|deadurl=|format=|accessdate=|archiveurl=|archivedate=|last=|date=1969|year=|month=|day=|language=de|pages=|quote=}}</ref>, he advanced the use of computers in exploration geophysics. During his tenure at the Clausthal University of Technology, he was in charge of processing the data for the German continental seismic reflection program (DEKORP)<ref>R. Meissner and R.K. Bortfeld. DEKORP–Atlas. ''Results of Deutsches Kontinentales Reflexionsseismisches Programm''. [[Springer_Science%2BBusiness_Media|Springer]] 1990</ref>. He also worked on the application of [[geometrical optics]] to seismic systems <ref>{{citation|surname1=R. Bortfeld|periodical=Geophysics|title=Geometrical ray theory: Rays and traveltimes in seismic systems (second‐order approximations of the traveltimes)|volume=54|issue=3|at=pp.&nbsp;342-349|date=1989|language=German
With his mathematical approach to solve problems of [[exploration geophysics]], Bortfeld has had long lasting impact, in particular on the field of [[reflection seismology]]. He is primarily known for the ''Bortfeld approximation''<ref>{{Cite journal |doi = 10.1111/j.1365-2478.1961.tb01670.x|title = Approximations to the Reflection and Transmission Coefficients of Plane Longitudinal and Transverse Waves|journal = Geophysical Prospecting|volume = 9|issue = 4|pages = 485–502|year = 1961|last1 = Bortfeld|first1 = R.|bibcode = 1961GeopP...9..485B}}</ref><ref>{{Cite book |doi = 10.1190/1.3513827|chapter = Bortfeld's Equation: A tool to discriminate commercial fluids on Hydrocarbons Exploration Projects through AVO analysis|title = SEG Technical Program Expanded Abstracts 2010|pages = 498–502|year = 2010|last1 = Giraldo|first1 = Lorena|last2 = Calle|first2 = Andrés|last3 = Plata|first3 = María}}</ref> of the [[Zoeppritz equations|Zöppritz equations]], which facilitated a physical interpretation of the reflection coefficients of [[seismic wave]]s. He has been considered as the father of the [[amplitude versus offset]] method,<ref name=Hubral_eulogy /> which, after further developments, has played a crucial role for the detection of economically useful geological deposits. Heading the data processing center at Prakla-Seismos,<ref>{{cite web|title=Organisation PRAKLA 1. Januar 1969|periodical=Prakla Seismos Rundschau Heft 34|publisher=PRAKLA Gesellschaft für praktische Lagerstättenforschung GmbH|url=http://www.diehl-net.com/Download/Rundschau/OCR/Rundschau_1969_34.pdf|format=|accessdate=|archiveurl=|archivedate=|last=|date=1969|language=de|pages=|quote=}}</ref> he advanced the use of computers in exploration geophysics. During his tenure at the Clausthal University of Technology, he was in charge of processing the data for the German continental seismic reflection program (DEKORP).<ref>R. Meissner and R.K. Bortfeld. DEKORP–Atlas. ''Results of Deutsches Kontinentales Reflexionsseismisches Programm''. [[Springer Science+Business Media|Springer]] 1990</ref> He also worked on the application of [[geometrical optics]] to seismic systems.<ref>{{cite journal |bibcode=1989Geop...54..342B|doi=10.1190/1.1442659|title=Geometrical ray theory: Rays and traveltimes in seismic systems (second-order approximations of the traveltimes)|journal=Geophysics|volume=54|issue=3|pages=342–349|year=1989|last1=Bortfeld|first1=R.}}</ref> This work inspired further developments by subsequent generations of geophysicists.<ref name=Hubral2002/> Bortfeld was awarded the [[Conrad Schlumberger Award]]<ref>{{cite web|title=Past Winners of the Conrad Schlumberger Award|periodical=|publisher=European Association of Geoscientists and Engineers|url=https://www.eage.org/en/about-eage/awards/overview-awards/conrad-schlumberger-award|format=|accessdate=|archiveurl=|archivedate=|last=|date=|year=|language=en|pages=|quote=}}</ref> in 1960 and the ''Reginald Fessenden Award'' in 1989.<ref>{{cite web|title=Recipients of the Reginald Fessenden Award|periodical=Reginald Fessenden Award|publisher=Society of Exploration Geophysicists|url=https://wiki.seg.org/wiki/Reginald_Fessenden_Award_(formerly_Medal_Award)|format=|accessdate=|archiveurl=|archivedate=|last=|date=|year=|language=en|pages=|quote=}}</ref>
}}</ref>. This work inspired further developments by subsequent generations of geophysicists<ref name=Hubral2002/>. Bortfeld was awarded the [[Conrad Schlumberger Award]]<ref>{{cite web|title=Past Winners of the Conrad Schlumberger Award|periodical=|publisher=European Association of Geoscientists and Engineers|url=https://www.eage.org/en/about-eage/awards/overview-awards/conrad-schlumberger-award|deadurl=|format=|accessdate=|archiveurl=|archivedate=|last=|date=|year=|month=|day=|language=en|pages=|quote=}}</ref> in 1960 and and the ''Reginald Fessenden Award'' in 1989.<ref>{{cite web|title=Recipients of the Reginald Fessenden Award|periodical=Reginald Fessenden Award|publisher=Society of Exploration Geophysicists|url=https://wiki.seg.org/wiki/Reginald_Fessenden_Award_(formerly_Medal_Award)|deadurl=|format=|accessdate=|archiveurl=|archivedate=|last=|date=|year=|month=|day=|language=en|pages=|quote=}}</ref>


== Selected publications ==
== Selected publications ==
* ''Approximations to the reflection and transmission coefficients of plane longitudinal and transverse waves'', Geophysical Prospecting, 1961.
* {{Cite journal |doi = 10.1111/j.1365-2478.1961.tb01670.x|title = Approximations to the Reflection and Transmission Coefficients of Plane Longitudinal and Transverse Waves|journal = Geophysical Prospecting|volume = 9|issue = 4|pages = 485–502|year = 1961|last1 = Bortfeld|first1 = R.|bibcode = 1961GeopP...9..485B}}
* ''Geometrical ray theory: Rays and traveltimes in seismic systems (second‐order approximations of the traveltimes)'', Geophysics 54(3): 342–349, 1989.
* {{cite journal |bibcode=1989Geop...54..342B|doi=10.1190/1.1442659|title=Geometrical ray theory: Rays and traveltimes in seismic systems (second-order approximations of the traveltimes)|journal=Geophysics|volume=54|issue=3|pages=342–349|year=1989|last1=Bortfeld|first1=R.}}
* R. Meissner and R.K. Bortfeld. ''DEKORP–Atlas. Results of Deutsches Kontinentales Reflexionsseismisches Programm'', Springer, Berlin-Heidelberg, 1990.
* R. Meissner and R.K. Bortfeld. ''DEKORP–Atlas. Results of Deutsches Kontinentales Reflexionsseismisches Programm'', Springer, Berlin-Heidelberg, 1990.


== Further reading ==
== Further reading ==
* [[:en:Exploration geophysics|Exploration geophysics]]
* [[Exploration geophysics]]
* [[:en:Amplitude versus offset|Amplitude vs. Offset]]
* [[Amplitude versus offset]]
* [[:en:Zoeppritz equations|Zoeppritz equations]]
* [[Zoeppritz equations]]


== Citations ==
==References==
<references />
<references />


{{Authority control}}


{{DEFAULTSORT:Bortfeld, Reinhard}}
<!--- Categories --->
[[Category:German geophysicists]]
[[Category:1927 births]]
[[Category:2019 deaths]]
[[Category:People from Wittenberg (district)]]
[[Category:People from Nordsachsen]]
[[Category:University of Göttingen alumni]]
[[Category:German expatriates in the Netherlands]]
[[Category:20th-century German geologists]]
[[Category:Academic staff of the Clausthal University of Technology]]

Latest revision as of 14:20, 22 August 2024

Reinhard Bortfeld
Bortfeld in 2007
Born(1927-02-25)25 February 1927
Belgern
Died10 July 2019(2019-07-10) (aged 92)
Hannover
NationalityGerman
Alma materUniversity of Göttingen
Known for
  • Bortfeld approximation
  • geometrical ray theory
Awards
Scientific career
FieldsGeophysics
Institutions

Reinhard Bortfeld (25 February 1927 – 10 July 2019) was a German geophysicist.

Life

[edit]

Bortfeld grew up in Annaburg in Saxony-Anhalt, Germany. After World War II he came to Göttingen where he studied Mathematics, graduated with a Staatsexamen in 1950, and completed his Ph.D. in 1951. He worked for many years as a geophysicist in the industry: from 1952 until 1962 at Mobil Oil A.G. in Celle, then until 1975 at Prakla-Seismos in Hannover, and finally until 1980 at Royal Dutch Shell in The Hague, Netherlands. In 1980 he became a full professor and director of the Institute of Geophysics at the Clausthal University of Technology, Germany. He retired and became professor emeritus in 1992.[1][2][3] In 1960 Bortfeld married Monika Bortfeld, with whom he has a son, Thomas, and a daughter, Julia.

Work in geophysics

[edit]

With his mathematical approach to solve problems of exploration geophysics, Bortfeld has had long lasting impact, in particular on the field of reflection seismology. He is primarily known for the Bortfeld approximation[4][5] of the Zöppritz equations, which facilitated a physical interpretation of the reflection coefficients of seismic waves. He has been considered as the father of the amplitude versus offset method,[1] which, after further developments, has played a crucial role for the detection of economically useful geological deposits. Heading the data processing center at Prakla-Seismos,[6] he advanced the use of computers in exploration geophysics. During his tenure at the Clausthal University of Technology, he was in charge of processing the data for the German continental seismic reflection program (DEKORP).[7] He also worked on the application of geometrical optics to seismic systems.[8] This work inspired further developments by subsequent generations of geophysicists.[2] Bortfeld was awarded the Conrad Schlumberger Award[9] in 1960 and the Reginald Fessenden Award in 1989.[10]

Selected publications

[edit]
  • Bortfeld, R. (1961). "Approximations to the Reflection and Transmission Coefficients of Plane Longitudinal and Transverse Waves". Geophysical Prospecting. 9 (4): 485–502. Bibcode:1961GeopP...9..485B. doi:10.1111/j.1365-2478.1961.tb01670.x.
  • Bortfeld, R. (1989). "Geometrical ray theory: Rays and traveltimes in seismic systems (second-order approximations of the traveltimes)". Geophysics. 54 (3): 342–349. Bibcode:1989Geop...54..342B. doi:10.1190/1.1442659.
  • R. Meissner and R.K. Bortfeld. DEKORP–Atlas. Results of Deutsches Kontinentales Reflexionsseismisches Programm, Springer, Berlin-Heidelberg, 1990.

Further reading

[edit]

References

[edit]
  1. ^ a b Peter Hubral. "Reinhard Bortfeld". Biography Citation for the Reginald Fessenden Award. Society of Exploration Geophysicists Wiki.
  2. ^ a b Peter Hubral (2002), European Association of Geoscientists and Engineers (ed.), Reinhard Bortfeld, Reflections Seismics (in German) (Reprint Series No. 1 ed.), ISBN 90-73781-22-1
  3. ^ "Institutsgeschichte" (in German). Institut für Geophysik TU Clausthal.
  4. ^ Bortfeld, R. (1961). "Approximations to the Reflection and Transmission Coefficients of Plane Longitudinal and Transverse Waves". Geophysical Prospecting. 9 (4): 485–502. Bibcode:1961GeopP...9..485B. doi:10.1111/j.1365-2478.1961.tb01670.x.
  5. ^ Giraldo, Lorena; Calle, Andrés; Plata, María (2010). "Bortfeld's Equation: A tool to discriminate commercial fluids on Hydrocarbons Exploration Projects through AVO analysis". SEG Technical Program Expanded Abstracts 2010. pp. 498–502. doi:10.1190/1.3513827.
  6. ^ "Organisation PRAKLA 1. Januar 1969" (PDF). Prakla Seismos Rundschau Heft 34 (in German). PRAKLA Gesellschaft für praktische Lagerstättenforschung GmbH. 1969.
  7. ^ R. Meissner and R.K. Bortfeld. DEKORP–Atlas. Results of Deutsches Kontinentales Reflexionsseismisches Programm. Springer 1990
  8. ^ Bortfeld, R. (1989). "Geometrical ray theory: Rays and traveltimes in seismic systems (second-order approximations of the traveltimes)". Geophysics. 54 (3): 342–349. Bibcode:1989Geop...54..342B. doi:10.1190/1.1442659.
  9. ^ "Past Winners of the Conrad Schlumberger Award". European Association of Geoscientists and Engineers.
  10. ^ "Recipients of the Reginald Fessenden Award". Reginald Fessenden Award. Society of Exploration Geophysicists.
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