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World Scientist and University Rankings 2026
Spain Engineering & Technology / Petroleum Engineering 22 Scientists Subject Rankings
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 5 years. As of Jan 03, 2026, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (1.131.752) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H Index Rankings
Rankings
60,702
World Rank
1,485
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Petroleum Engineering
petrologia | volcanologia | riesgo | hazard | geologí
petrologia | volcanologia | riesgo | hazard | geologí
H-Index Metrics
-
H-Index59
-
i10 Index237
-
Citation Counts11,983
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* Total H Index Rankings
Rankings
77,576
World Rank
2,027
Country Rank
101
University
Ranking Based On Selection:
2
Engineering & Technology / Petroleum Engineering
Petrology | Geochronology | Geochemistry | Variscan | Tectonic
Petrology | Geochronology | Geochemistry | Variscan | Tectonic
H-Index Metrics
-
H-Index54
-
i10 Index102
-
Citation Counts9,222
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* Total H Index Rankings
Rankings
114,748
World Rank
3,267
Country Rank
228
University
Ranking Based On Selection:
3
Engineering & Technology / Petroleum Engineering
Mineralogy | Ore deposits | Petrology | Geochemistry | Geodynamic
Mineralogy | Ore deposits | Petrology | Geochemistry | Geodynamic
H-Index Metrics
-
H-Index46
-
i10 Index154
-
Citation Counts8,240
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* Total H Index Rankings
Rankings
170,763
World Rank
5,242
Country Rank
10
University
Ranking Based On Selection:
4
Engineering & Technology / Petroleum Engineering
Organic Petrology | Organic Geochemistry | Peat | Coal Science | Coal Combustio
Organic Petrology | Organic Geochemistry | Peat | Coal Science | Coal Combustio
H-Index Metrics
-
H-Index39
-
i10 Index76
-
Citation Counts3,976
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* Total H Index Rankings
Rankings
197,078
World Rank
6,104
Country Rank
159
University
Ranking Based On Selection:
5
Engineering & Technology / Petroleum Engineering
Metamorphic Petrology | Experimental Petrology | Microstructur
Metamorphic Petrology | Experimental Petrology | Microstructur
H-Index Metrics
-
H-Index36
-
i10 Index60
-
Citation Counts3,807
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* Total H Index Rankings
Rankings
222,341
World Rank
6,994
Country Rank
56
University
Ranking Based On Selection:
6
* Total H Index Rankings
Rankings
258,165
World Rank
8,306
Country Rank
480
University
Ranking Based On Selection:
7
Engineering & Technology / Petroleum Engineering
Sedimentary Petrology | Structural Geology | Geofluids | Energy Transitio
Sedimentary Petrology | Structural Geology | Geofluids | Energy Transitio
H-Index Metrics
-
H-Index31
-
i10 Index70
-
Citation Counts4,046
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* Total H Index Rankings
Rankings
337,303
World Rank
11,097
Country Rank
709
University
Ranking Based On Selection:
8
Engineering & Technology / Petroleum Engineering
Petrología y Geoquímica de rocas ígneas | Geocronología U-Pb en circones | Magmatismo básico | Lamprófidos | Xenolitos del manto. ..
Petrología y Geoquímica de rocas ígneas | Geocronología U-Pb en circones | Magmatismo básico | Lamprófidos | Xenolitos del manto. ..
H-Index Metrics
-
H-Index27
-
i10 Index37
-
Citation Counts1,980
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* Total H Index Rankings
Rankings
339,248
World Rank
11,190
Country Rank
718
University
Ranking Based On Selection:
9
Engineering & Technology / Petroleum Engineering
Conservation heritage | weathering/decay | natural/artifical stones | petrology & petrophysic
Conservation heritage | weathering/decay | natural/artifical stones | petrology & petrophysic
H-Index Metrics
-
H-Index27
-
i10 Index56
-
Citation Counts2,665
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* Total H Index Rankings
Rankings
357,743
World Rank
11,774
Country Rank
352
University
Ranking Based On Selection:
10
Engineering & Technology / Petroleum Engineering
Igneous petrology | volcanology | geochemistry | mineralog
Igneous petrology | volcanology | geochemistry | mineralog
H-Index Metrics
-
H-Index26
-
i10 Index70
-
Citation Counts2,715
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Premium Data
* Total H Index Rankings
Rankings
433,934
World Rank
14,408
Country Rank
284
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
466,784
World Rank
15,624
Country Rank
1,020
University
Ranking Based On Selection:
12
Engineering & Technology / Petroleum Engineering
Petrología sedimentaria | diagénesis de carbonatos | sedimentologí
Petrología sedimentaria | diagénesis de carbonatos | sedimentologí
H-Index Metrics
-
H-Index22
-
i10 Index36
-
Citation Counts1,394
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* Total H Index Rankings
Rankings
531,544
World Rank
17,803
Country Rank
1,178
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
678,710
World Rank
22,561
Country Rank
1,481
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
722,883
World Rank
24,029
Country Rank
1,604
University
Ranking Based On Selection:
15
Engineering & Technology / Petroleum Engineering
Mineralogy | Sedimentary Petrology | Palaeoclimatology | Taphonomy | Educatio
Mineralogy | Sedimentary Petrology | Palaeoclimatology | Taphonomy | Educatio
H-Index Metrics
-
H-Index15
-
i10 Index26
-
Citation Counts705
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Premium Data
* Total H Index Rankings
Rankings
724,954
World Rank
24,115
Country Rank
483
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
733,692
World Rank
24,501
Country Rank
352
University
Ranking Based On Selection:
17
* Total H Index Rankings
Rankings
770,939
World Rank
25,665
Country Rank
457
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
885,970
World Rank
29,780
Country Rank
577
University
Ranking Based On Selection:
19
Engineering & Technology / Petroleum Engineering
Microscopía | Petrología | Geocronología | Mineralogía | Recursos Minerale
Microscopía | Petrología | Geocronología | Mineralogía | Recursos Minerale
H-Index Metrics
-
H-Index12
-
i10 Index17
-
Citation Counts923
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Premium Data
* Total H Index Rankings
Rankings
1,557,879
World Rank
50,754
Country Rank
556
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
1,598,380
World Rank
51,770
Country Rank
1,403
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
1,935,066
World Rank
58,348
Country Rank
1,606
University
Ranking Based On Selection:
22
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