World Scientist and University Rankings 2025

Canada Engineering & Technology / Petroleum Engineering 56 Scientists Subject Rankings - 2025

The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 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 6 yearsAs of Jan 30, 2025, 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 (873.690) 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 56 scientists, 1 country, 15 institution
* Total H IndexRankings
Ranking Based On Selection: 1
DG Pearson
Geochemistry
igneous petrology
platinum group element geochemistry
Re-Os isotopes
Molecular
Metrics
H-Index
i10 Index
Citation Counts
88
346
28,444
* Total H IndexRankings
Ranking Based On Selection: 2
Gerrit Voordouw
Petroleum Microbiology
Sulfate-reducing bacteria
Metrics
H-Index
i10 Index
Citation Counts
74
214
17,006
* Total H IndexRankings
Ranking Based On Selection: 3
Murray Gray
heavy oil
interfacial science
chemical reactors
biochemical reactors
Metrics
H-Index
i10 Index
Citation Counts
71
250
15,921
* Total H IndexRankings
Ranking Based On Selection: 5
C Michael Lesher
Ore Deposits
Igneous Geochemistry
Igneous Petrology
Metrics
H-Index
i10 Index
Citation Counts
47
87
10,845
* Total H IndexRankings
Ranking Based On Selection: 7
Zhehui Jin
Statistical Thermodynamics
Interfacial Physics
Molecular Modeling and Simulation
Metrics
H-Index
i10 Index
Citation Counts
43
97
6,417
* Total H IndexRankings
Ranking Based On Selection: 9
Tony Withers
Experimental petrology
planetary volatiles
Metrics
H-Index
i10 Index
Citation Counts
38
46
5,491

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

* Total H IndexRankings
Ranking Based On Selection: 11
Jerry Jensen
Interwell connectivity
petrophysics
Metrics
H-Index
i10 Index
Citation Counts
37
75
5,657
* Total H IndexRankings
Ranking Based On Selection: 13
Maya Kopylova
diamond
diamond inclusions
mantle petrology
mantle xenoliths
kimberlite petrology
Metrics
H-Index
i10 Index
Citation Counts
35
73
5,221
* Total H IndexRankings
Ranking Based On Selection: 14
Shengnan Nancy Chen
reservoir engineering
machine learning
unconventional reservoir development
simulation and optimization
Metrics
H-Index
i10 Index
Citation Counts
32
93
3,248
* Total H IndexRankings
Ranking Based On Selection: 15
Hemanta Sarma
petroleum engineering
enhanced oil recovery
chemical engineering
Metrics
H-Index
i10 Index
Citation Counts
31
96
3,880
* Total H IndexRankings
Ranking Based On Selection: 16
Thomas Skulski
tectonics
igneous petrology
geochemistry
isotope geochemistry
Precambrian geology
Metrics
H-Index
i10 Index
Citation Counts
29
75
3,452
* Total H IndexRankings
Ranking Based On Selection: 17
Amin Ghanizadeh
Unconvetional oil/gas
Geological CO2 sequestration
Subsurface H2 storage
Li-rich brines
Metrics
H-Index
i10 Index
Citation Counts
28
50
4,852
* Total H IndexRankings
Ranking Based On Selection: 18
S Hossein Hejazi
Porous Media
Interfacial Flows
Hydrodynamic Stability
Fluid Mechanics
Petroleum Engineering
Metrics
H-Index
i10 Index
Citation Counts
28
63
2,577
* Total H IndexRankings
Ranking Based On Selection: 19
Patricia Corcoran
Microplastics
Sedimentary Petrology
Metrics
H-Index
i10 Index
Citation Counts
28
49
6,812
* Total H IndexRankings
Ranking Based On Selection: 20
Herman S Grutter
Petrology
Geochemistry
Diamond
Porphyry
Metrics
H-Index
i10 Index
Citation Counts
23
33
3,334
* Total H IndexRankings
Ranking Based On Selection: 21
Ralf Tappert
Mantle Petrology
Carbon Cycle
Diamonds
Kimberlites
Amber
Metrics
H-Index
i10 Index
Citation Counts
21
28
2,159
* Total H IndexRankings
Ranking Based On Selection: 22
Mary Lou Bevier
Isotope geology and geochronology
petrology
field geology
geoscience education
Metrics
H-Index
i10 Index
Citation Counts
20
34
1,451
* Total H IndexRankings
Ranking Based On Selection: 23
Jesse Williams Kovacs
Reservoir Characterization
Rate-Transient Analysis (RTA)
Pressure-Transient Analysis (PTA)
Modeling
Reserves Evaluations
Metrics
H-Index
i10 Index
Citation Counts
19
24
1,241
* Total H Index Rankings
Rankings
Ranking Based On Selection: 1
DG Pearson
Metrics
H-Index
i10-Index
Citation Counts
88
346
28,444
Geochemistry
igneous petrology
platinum group element geochemistry
Re-Os isotopes
Molecular
* Total H Index Rankings
Rankings
Ranking Based On Selection: 2
Gerrit Voordouw
Metrics
H-Index
i10-Index
Citation Counts
74
214
17,006
* Total H Index Rankings
Rankings
Ranking Based On Selection: 3
Murray Gray
Metrics
H-Index
i10-Index
Citation Counts
71
250
15,921
heavy oil
interfacial science
chemical reactors
biochemical reactors
* Total H Index Rankings
Rankings
Ranking Based On Selection: 4
George Jenner
Metrics
H-Index
i10-Index
Citation Counts
50
72
11,156
* Total H Index Rankings
Rankings
Ranking Based On Selection: 5
C Michael Lesher
Metrics
H-Index
i10-Index
Citation Counts
47
87
10,845
Ore Deposits
Igneous Geochemistry
Igneous Petrology
* Total H Index Rankings
Rankings
Ranking Based On Selection: 6
Roberto Aguilera
Metrics
H-Index
i10-Index
Citation Counts
45
121
7,095
* Total H Index Rankings
Rankings
Ranking Based On Selection: 7
Zhehui Jin
Metrics
H-Index
i10-Index
Citation Counts
43
97
6,417
Statistical Thermodynamics
Interfacial Physics
Molecular Modeling and Simulation
* Total H Index Rankings
Rankings
Ranking Based On Selection: 8
John A Percival
Metrics
H-Index
i10-Index
Citation Counts
43
111
6,732
* Total H Index Rankings
Rankings
Ranking Based On Selection: 9
Tony Withers
Metrics
H-Index
i10-Index
Citation Counts
38
46
5,491
* Total H Index Rankings
Rankings
Ranking Based On Selection: 10
Fanhuabill Zeng
Metrics
H-Index
i10-Index
Citation Counts
37
114
4,811

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

* Total H Index Rankings
Rankings
Ranking Based On Selection: 11
Jerry Jensen
Metrics
H-Index
i10-Index
Citation Counts
37
75
5,657
* Total H Index Rankings
Rankings
Ranking Based On Selection: 12
Huazhou Li
Metrics
H-Index
i10-Index
Citation Counts
35
91
4,280
* Total H Index Rankings
Rankings
Ranking Based On Selection: 13
Maya Kopylova
Metrics
H-Index
i10-Index
Citation Counts
35
73
5,221
diamond
diamond inclusions
mantle petrology
mantle xenoliths
kimberlite petrology
* Total H Index Rankings
Rankings
Ranking Based On Selection: 14
Shengnan Nancy Chen
Metrics
H-Index
i10-Index
Citation Counts
32
93
3,248
reservoir engineering
machine learning
unconventional reservoir development
simulation and optimization
* Total H Index Rankings
Rankings
Ranking Based On Selection: 15
Hemanta Sarma
Metrics
H-Index
i10-Index
Citation Counts
31
96
3,880
petroleum engineering
enhanced oil recovery
chemical engineering
* Total H Index Rankings
Rankings
Ranking Based On Selection: 16
Thomas Skulski
Metrics
H-Index
i10-Index
Citation Counts
29
75
3,452
tectonics
igneous petrology
geochemistry
isotope geochemistry
Precambrian geology
* Total H Index Rankings
Rankings
Ranking Based On Selection: 17
Amin Ghanizadeh
Metrics
H-Index
i10-Index
Citation Counts
28
50
4,852
Unconvetional oil/gas
Geological CO2 sequestration
Subsurface H2 storage
Li-rich brines
* Total H Index Rankings
Rankings
Ranking Based On Selection: 18
S Hossein Hejazi
Metrics
H-Index
i10-Index
Citation Counts
28
63
2,577
Porous Media
Interfacial Flows
Hydrodynamic Stability
Fluid Mechanics
Petroleum Engineering
* Total H Index Rankings
Rankings
Ranking Based On Selection: 19
Patricia Corcoran
Metrics
H-Index
i10-Index
Citation Counts
28
49
6,812
* Total H Index Rankings
Rankings
Ranking Based On Selection: 20
Herman S Grutter
Metrics
H-Index
i10-Index
Citation Counts
23
33
3,334
* Total H Index Rankings
Rankings
Ranking Based On Selection: 21
Ralf Tappert
Metrics
H-Index
i10-Index
Citation Counts
21
28
2,159
Mantle Petrology
Carbon Cycle
Diamonds
Kimberlites
Amber
* Total H Index Rankings
Rankings
Ranking Based On Selection: 22
Mary Lou Bevier
Metrics
H-Index
i10-Index
Citation Counts
20
34
1,451
Isotope geology and geochronology
petrology
field geology
geoscience education
* Total H Index Rankings
Rankings
Ranking Based On Selection: 23
Jesse Williams Kovacs
Metrics
H-Index
i10-Index
Citation Counts
19
24
1,241
Reservoir Characterization
Rate-Transient Analysis (RTA)
Pressure-Transient Analysis (PTA)
Modeling
Reserves Evaluations
* Total H Index Rankings
Rankings
Ranking Based On Selection: 24
Hamidreza Hamdi
Metrics
H-Index
i10-Index
Citation Counts
19
40
1,104
* Total H Index Rankings
Rankings
Ranking Based On Selection: 25
Per Kent Pedersen
Metrics
H-Index
i10-Index
Citation Counts
18
39
1,894