Total 2,384,784 scientists, country 221, and institutions 24,462 are evaluated in the Productivity Rankings, an exclusive service provided by AD Scientific Index. This ranking measures and highlights the scientific productivity of researchers based on the i10 index (number of publications with at least 10 citations). This system identifies highly productive scientists across disciplines, institutions, and regions, contributing to the development of evidence-based academic policies and effective incentive mechanisms. The rankings include global, regional, and institutional analyses, along with specialized rankings such as Scientists' Last 6 Years' i10 Index and Universities' i10 Index Rankings 2025. With Premium Membership, you can:
- Gain full access to detailed comparisons and advanced analytics,
- Objectively evaluate your academic productivity,
- Make strategic, data-driven decisions to enhance performance.
* Total i10 IndexRankings
Ranking Based On Selection: 1
Geochemistry
igneous petrology
platinum group element geochemistry
Re-Os isotopes
Molecular
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
346
262
0.757
* Total i10 IndexRankings
Ranking Based On Selection: 2
heavy oil
interfacial science
chemical reactors
biochemical reactors
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
250
118
0.472
* Total i10 IndexRankings
Ranking Based On Selection: 3
Petroleum Microbiology
Sulfate-reducing bacteria
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
214
105
0.491
* Total i10 IndexRankings
Ranking Based On Selection: 4
Petroleum engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
121
60
0.496
* Total i10 IndexRankings
Ranking Based On Selection: 5
Petroleum Engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
114
86
0.754
* Total i10 IndexRankings
Ranking Based On Selection: 6
Precambrian
petrology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
111
38
0.342
* Total i10 IndexRankings
Ranking Based On Selection: 7
Statistical Thermodynamics
Interfacial Physics
Molecular Modeling and Simulation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
97
96
0.990
* Total i10 IndexRankings
Ranking Based On Selection: 8
petroleum engineering
enhanced oil recovery
chemical engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
96
56
0.583
* Total i10 IndexRankings
Ranking Based On Selection: 9
reservoir engineering
machine learning
unconventional reservoir development
simulation and optimization
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
93
72
0.774
* Total i10 IndexRankings
Ranking Based On Selection: 10
Petroleum Engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
91
79
0.868
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 i10 IndexRankings
Ranking Based On Selection: 11
Ore Deposits
Igneous Geochemistry
Igneous Petrology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
87
44
0.506
* Total i10 IndexRankings
Ranking Based On Selection: 12
Interwell connectivity
petrophysics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
75
36
0.480
* Total i10 IndexRankings
Ranking Based On Selection: 13
tectonics
igneous petrology
geochemistry
isotope geochemistry
Precambrian geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
75
25
0.333
* Total i10 IndexRankings
Ranking Based On Selection: 14
diamond
diamond inclusions
mantle petrology
mantle xenoliths
kimberlite petrology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
73
50
0.685
* Total i10 IndexRankings
Ranking Based On Selection: 15
igneous petrology
geochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
72
51
0.708
* Total i10 IndexRankings
Ranking Based On Selection: 16
Porous Media
Interfacial Flows
Hydrodynamic Stability
Fluid Mechanics
Petroleum Engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
63
51
0.810
* Total i10 IndexRankings
Ranking Based On Selection: 17
Unconvetional oil/gas
Geological CO2 sequestration
Subsurface H2 storage
Li-rich brines
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
50
46
0.920
* Total i10 IndexRankings
Ranking Based On Selection: 18
Microplastics
Sedimentary Petrology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
49
31
0.633
* Total i10 IndexRankings
Ranking Based On Selection: 19
Experimental petrology
planetary volatiles
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
46
38
0.826
* Total i10 IndexRankings
Ranking Based On Selection: 20
Petroleum Engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
40
30
0.750
* Total i10 IndexRankings
Ranking Based On Selection: 21
Reservoir Characterization
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
29
0.744
* Total i10 IndexRankings
Ranking Based On Selection: 22
Isotope geology and geochronology
petrology
field geology
geoscience education
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
34
6
0.176
* Total i10 IndexRankings
Ranking Based On Selection: 23
Petrology
Geochemistry
Diamond
Porphyry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
33
19
0.576
* Total i10 IndexRankings
Ranking Based On Selection: 24
Mantle Petrology
Carbon Cycle
Diamonds
Kimberlites
Amber
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
23
0.821
* Total i10 IndexRankings
Ranking Based On Selection: 25
CO2/Chemical/thermal-based EOR
CCUS
tight/heavy/shale oil
foamy oil flow
modeling and numerical simulation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
22
0.786
DG Pearson
University of Alberta
Edmonton, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
346
262
0.757
Geochemistry
igneous petrology
platinum group element geochemistry
Re-Os isotopes
Molecular
Murray Gray
University of Alberta
Edmonton, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
250
118
0.472
heavy oil
interfacial science
chemical reactors
biochemical reactors
Gerrit Voordouw
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
214
105
0.491
Petroleum Microbiology
Sulfate-reducing bacteria
Roberto Aguilera
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
121
60
0.496
Petroleum engineering
Fanhuabill Zeng
University of Regina
Regina, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
114
86
0.754
Petroleum Engineering
John A Percival
Natural Resource Canada
Ottawa, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
111
38
0.342
Precambrian
petrology
Zhehui Jin
University of Alberta
Edmonton, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
97
96
0.990
Statistical Thermodynamics
Interfacial Physics
Molecular Modeling and Simulation
Hemanta Sarma
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
96
56
0.583
petroleum engineering
enhanced oil recovery
chemical engineering
Shengnan Nancy Chen
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
93
72
0.774
reservoir engineering
machine learning
unconventional reservoir development
simulation and optimization
Huazhou Li
University of Alberta
Edmonton, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
91
79
0.868
Petroleum Engineering
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!
C Michael Lesher
Université Laurentienne
Sudbury, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
87
44
0.506
Ore Deposits
Igneous Geochemistry
Igneous Petrology
Jerry Jensen
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
75
36
0.480
Interwell connectivity
petrophysics
Thomas Skulski
Natural Resource Canada
Ottawa, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
75
25
0.333
tectonics
igneous petrology
geochemistry
isotope geochemistry
Precambrian geology
Maya Kopylova
University of British Columbia
Vancouver, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
73
50
0.685
diamond
diamond inclusions
mantle petrology
mantle xenoliths
kimberlite petrology
George Jenner
Memorial University of Newfoundland
St John’s, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
72
51
0.708
igneous petrology
geochemistry
S Hossein Hejazi
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
63
51
0.810
Porous Media
Interfacial Flows
Hydrodynamic Stability
Fluid Mechanics
Petroleum Engineering
Amin Ghanizadeh
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
50
46
0.920
Unconvetional oil/gas
Geological CO2 sequestration
Subsurface H2 storage
Li-rich brines
Patricia Corcoran
Western University Canada
London, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
49
31
0.633
Microplastics
Sedimentary Petrology
Tony Withers
Western University Canada
London, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
46
38
0.826
Experimental petrology
planetary volatiles
Hamidreza Hamdi
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
40
30
0.750
Petroleum Engineering
Per Kent Pedersen
University of Calgary
Calgary, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
29
0.744
Reservoir Characterization
Mary Lou Bevier
University of British Columbia
Vancouver, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
34
6
0.176
Isotope geology and geochronology
petrology
field geology
geoscience education
Herman S Grutter
University of Alberta
Edmonton, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
33
19
0.576
Petrology
Geochemistry
Diamond
Porphyry
Ralf Tappert
Lakehead University
Thunder Bay, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
23
0.821
Mantle Petrology
Carbon Cycle
Diamonds
Kimberlites
Amber
Xiang Zhou
University of Regina
Regina, Canada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
22
0.786
CO2/Chemical/thermal-based EOR
CCUS
tight/heavy/shale oil
foamy oil flow
modeling and numerical simulation