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World Scientist and University Rankings 2026

Engineering & Technology / Petroleum Engineering 2.300 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 yearsAs of Jan 03, 2026, the rankings are determined according to the Total H IndexBETA 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 2.300 scientist , 221 country , 24,661 institution , Updates every 3 days
* Total H Index Rankings

Rankings

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4,646
World Rank
177
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Petroleum Engineering
Geochronology | Geochemistry | Petrology | Chemical geodynamic

H-Index Metrics

  • H-Index
    124
  • i10 Index
    341
  • Citation Counts
    59,540
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* Total H Index Rankings

Rankings

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4,952
World Rank
57
Country Rank
10
University
Ranking Based On Selection:
2
Engineering & Technology / Petroleum Engineering
Igneous Petrology | Economic Geology | Ore Deposit

H-Index Metrics

  • H-Index
    122
  • i10 Index
    396
  • Citation Counts
    48,686
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* Total H Index Rankings

Rankings

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9,026
World Rank
837
Country Rank
118
University
Ranking Based On Selection:
3
Engineering & Technology / Petroleum Engineering
element partitioning | planetary accretion | volcanic gases | experimental petrolog

H-Index Metrics

  • H-Index
    105
  • i10 Index
    250
  • Citation Counts
    33,385
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* Total H Index Rankings

Rankings

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10,369
World Rank
4,512
Country Rank
34
University
Ranking Based On Selection:
4
Engineering & Technology / Petroleum Engineering
petroleum engineering | hydraulic fracturing | formation damage | water injection | production engineerin

H-Index Metrics

  • H-Index
    101
  • i10 Index
    635
  • Citation Counts
    41,453
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* Total H Index Rankings

Rankings

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10,797
World Rank
4,691
Country Rank
4
University
Ranking Based On Selection:
5
Engineering & Technology / Petroleum Engineering
mineralogy | astrobiology | astrochemistry | petrolog

H-Index Metrics

  • H-Index
    100
  • i10 Index
    354
  • Citation Counts
    35,592
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* Total H Index Rankings

Rankings

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12,828
World Rank
631
Country Rank
5
University
Ranking Based On Selection:
6
Engineering & Technology / Petroleum Engineering
Igneous petrology/geochemistry | Lithospheric mantle | Large igneous provinces | Big mantle Wedge | Earth's habitabilit

H-Index Metrics

  • H-Index
    95
  • i10 Index
    331
  • Citation Counts
    33,719
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* Total H Index Rankings

Rankings

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13,042
World Rank
5,639
Country Rank
130
University
Ranking Based On Selection:
7
Engineering & Technology / Petroleum Engineering
Igneous petrology | Experimental Petrology | Geochemistry | Mineralog

H-Index Metrics

  • H-Index
    95
  • i10 Index
    219
  • Citation Counts
    33,403
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* Total H Index Rankings

Rankings

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13,401
World Rank
672
Country Rank
12
University
Ranking Based On Selection:
8
Engineering & Technology / Petroleum Engineering
Geochronology | Isotope Geochemistry | LA-ICP-MS | Laser ablation ICP-MS | Petrolog

H-Index Metrics

  • H-Index
    94
  • i10 Index
    394
  • Citation Counts
    35,792
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* Total H Index Rankings

Rankings

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14,529
World Rank
586
Country Rank
38
University
Ranking Based On Selection:
9
Engineering & Technology / Petroleum Engineering
Isotope Geochemistry | Re-Os isotopes | Mantle Petrolog

H-Index Metrics

  • H-Index
    92
  • i10 Index
    364
  • Citation Counts
    31,162
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* Total H Index Rankings

Rankings

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15,906
World Rank
6,827
Country Rank
66
University
Ranking Based On Selection:
10
Engineering & Technology / Petroleum Engineering
petroleum engineering | reservoir engineering | enhanced oil recovery | reservoir simulatio

H-Index Metrics

  • H-Index
    91
  • i10 Index
    377
  • Citation Counts
    30,076
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* Total H Index Rankings

Rankings

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16,960
World Rank
7,251
Country Rank
15
University
Ranking Based On Selection:
11
Engineering & Technology / Petroleum Engineering
coal petrology | fly ash petrology | coal geochemistry | coal maceral origin

H-Index Metrics

  • H-Index
    88
  • i10 Index
    448
  • Citation Counts
    29,347
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* Total H Index Rankings

Rankings

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17,422
World Rank
888
Country Rank
8
University
Ranking Based On Selection:
12
Engineering & Technology / Petroleum Engineering
Switched systems | Fuzzy systems | Markovian jump systems | Delay systems | Robust contro

H-Index Metrics

  • H-Index
    87
  • i10 Index
    415
  • Citation Counts
    28,044
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* Total H Index Rankings

Rankings

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18,159
World Rank
929
Country Rank
1
University
Ranking Based On Selection:
13
Engineering & Technology / Petroleum Engineering
heat transfer | solar energy | optical properties | building | cf

H-Index Metrics

  • H-Index
    86
  • i10 Index
    658
  • Citation Counts
    34,609
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* Total H Index Rankings

Rankings

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18,431
World Rank
7,849
Country Rank
77
University
Ranking Based On Selection:
14
Engineering & Technology / Petroleum Engineering
Petroleum Engineering | Reservoir Simulatio

H-Index Metrics

  • H-Index
    86
  • i10 Index
    474
  • Citation Counts
    28,813
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* Total H Index Rankings

Rankings

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22,001
World Rank
1,036
Country Rank
21
University
Ranking Based On Selection:
15
Engineering & Technology / Petroleum Engineering
Mineralogy | Geochemistry | Petrolog

H-Index Metrics

  • H-Index
    82
  • i10 Index
    276
  • Citation Counts
    24,590
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* Total H Index Rankings

Rankings

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23,446
World Rank
1,245
Country Rank
42
University
Ranking Based On Selection:
16

H-Index Metrics

  • H-Index
    80
  • i10 Index
    656
  • Citation Counts
    31,142
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* Total H Index Rankings

Rankings

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24,291
World Rank
1,274
Country Rank
1
University
Ranking Based On Selection:
17
Engineering & Technology / Petroleum Engineering
Energy and materials | Oil and gas utilizatio

H-Index Metrics

  • H-Index
    79
  • i10 Index
    248
  • Citation Counts
    18,946
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* Total H Index Rankings

Rankings

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24,334
World Rank
1,163
Country Rank
3
University
Ranking Based On Selection:
18

H-Index Metrics

  • H-Index
    79
  • i10 Index
    393
  • Citation Counts
    26,504
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* Total H Index Rankings

Rankings

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24,595
World Rank
10,238
Country Rank
28
University
Ranking Based On Selection:
19

H-Index Metrics

  • H-Index
    79
  • i10 Index
    483
  • Citation Counts
    27,256
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* Total H Index Rankings

Rankings

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25,801
World Rank
1,257
Country Rank
36
University
Ranking Based On Selection:
20
Engineering & Technology / Petroleum Engineering
Earth Sciences | Geochemistry | Astrobiolog

H-Index Metrics

  • H-Index
    78
  • i10 Index
    184
  • Citation Counts
    25,599
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* Total H Index Rankings

Rankings

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25,956
World Rank
10,751
Country Rank
106
University
Ranking Based On Selection:
21
Engineering & Technology / Petroleum Engineering
reservoir engineering | enhanced oil recovery | petroleum engineerin

H-Index Metrics

  • H-Index
    79
  • i10 Index
    280
  • Citation Counts
    27,891
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* Total H Index Rankings

Rankings

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27,646
World Rank
1,459
Country Rank
2
University
Ranking Based On Selection:
22
* Total H Index Rankings

Rankings

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28,389
World Rank
1,204
Country Rank
59
University
Ranking Based On Selection:
23
Engineering & Technology / Petroleum Engineering
Petroleum Microbiology | Sulfate-reducing bacteri

H-Index Metrics

  • H-Index
    76
  • i10 Index
    215
  • Citation Counts
    17,843
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* Total H Index Rankings

Rankings

flag
32,300
World Rank
1,382
Country Rank
98
University
Ranking Based On Selection:
24
Engineering & Technology / Petroleum Engineering
heavy oil | interfacial science | chemical reactors | biochemical reactor

H-Index Metrics

  • H-Index
    73
  • i10 Index
    251
  • Citation Counts
    16,568
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* Total H Index Rankings

Rankings

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34,297
World Rank
141
Country Rank
5
University
Ranking Based On Selection:
25
Engineering & Technology / Petroleum Engineering
Enhanced Oil Recovery | Flow in Porous Media | Nano and Bio Technologies in Oil and Gas Industrie

H-Index Metrics

  • H-Index
    71
  • i10 Index
    255
  • Citation Counts
    15,524
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