Productivity Rankings is a unique service offered only by “AD Scientific Index”. This is a ranking system derived from the i10 index in order to show the productivity of the scientist in publishing scientific articles of value. Productivity Rankings is an instrument that lists productive scientists in a given area, discipline, university, and country and can guide the development of meaningful incentives and academic policies. The world rankings, regional rankings, and university rankings of scientists in this table are developed based on the total i10 index. Additionally, click to view the special rankings based on Productivity Rankings: Scientists Last 6 years' i10 Index", Universities Total i10 Index Rankings 2025, Universities Last 6 Years i10 Index Rankings 2025 "Art and Humanities i10 Productivity Rankings" and "Social Sciences and Humanities i10 Productivity Rankings".
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :1
Geomechanics
Pore pressure prediction
Pore pressure
Wellbore stability
Rock mechanics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
45
0.672
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :2
Geofisica
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
95
41
0.432
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :3
Rock Physics
Geophysics
Petrophysics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
44
36
0.818
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :4
Tectonics
Plate kinematics
Geodynamics
Paleogeography
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
31
0.838
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :5
Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
29
27
0.931
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :6
Geochemistry / CCS / nuclear waste storage
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
26
0.929
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :7
Geology
Tectonics
Mineral Exploration
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
24
0.462
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :8
Geology
Structural Geology
Seismic Interpretation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
30
23
0.767
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :9
Geomechanics
Rock Mechanics
Rock Physics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
50
20
0.400
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :10
Geochemistry
stable isotopes
mineral diagenesis
hydrocarbons
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
42
18
0.429
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :11
Seismic inversion and imaging
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
24
18
0.750
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :12
Geophysics/Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
17
0.944
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :13
Tectonics
Geodynamics
Rifted margins
structural geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
17
1.000
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :14
Carbonate Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
16
0.571
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :15
Renewable Natural Gas
Low-Carbon Biofuels
Environmental Microbiology
Isotope Geochemistry
Fermentation Technology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
16
0.889
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :16
Carbonate Reservoir Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
26
15
0.577
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :17
Sedimentology
Stratigraphy
Diagenesis
Petrophysics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
14
0.700
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :18
Earth Sciences
Petroleum Geosciences
Gas Hydrates
Diagenesis
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
14
14
1.000
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :19
Stratigraphy
Stratigraphic Forward Modeling
Reservoir Modeling
Deep Learning
Machine Learning
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
13
0.765
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :20
Geology
Structural Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
14
13
0.929
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :21
Geology
Geoscience
Sedimentology
Stratigraphy
Energy Resources
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
26
12
0.462
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :22
geophysics
oil and gas exploration and development
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
11
0.611
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :23
Geology
Structural Geology
Petroleum geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
13
11
0.846
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :24
Sedimentary Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
9
8
0.889
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :25
Solar Photovoltaics
Geophysical Sensors
Organic Light Emitting Diodes
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
13
7
0.538
Jon Jincai Zhang
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
45
0.672
Geomechanics
Pore pressure prediction
Pore pressure
Wellbore stability
Rock mechanics
Jorge Lopez
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
95
41
0.432
Ronny Hofmann
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
44
36
0.818
Rock Physics
Geophysics
Petrophysics
Christian Heine
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
31
0.838
Tectonics
Plate kinematics
Geodynamics
Paleogeography
Ruarri J Day-Stirrat
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
29
27
0.931
Niko Kampman
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
26
0.929
Geochemistry / CCS / nuclear waste storage
Mark W Martin
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
24
0.462
Geology
Tectonics
Mineral Exploration
John Solum
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
30
23
0.767
Geology
Structural Geology
Seismic Interpretation
Rishi Singh
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
50
20
0.400
Geomechanics
Rock Mechanics
Rock Physics
L Taras Bryndzia
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
42
18
0.429
Geochemistry
stable isotopes
mineral diagenesis
hydrocarbons
Wei Dai
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
24
18
0.750
Seismic inversion and imaging
Zhaohui Yang
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
17
0.944
Ken Mcdermott
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
17
1.000
Tectonics
Geodynamics
Rifted margins
structural geology
Michael C Poppelreiter
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
16
0.571
Olukayode Kuloyo|Kay Kuloyo
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
16
0.889
Renewable Natural Gas
Low-Carbon Biofuels
Environmental Microbiology
Isotope Geochemistry
Fermentation Technology
Joachim E Amthor
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
26
15
0.577
Andrew J Barnett
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
14
0.700
Sedimentology
Stratigraphy
Diagenesis
Petrophysics
Matteo Paganoni
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
14
14
1.000
Earth Sciences
Petroleum Geosciences
Gas Hydrates
Diagenesis
Oriol Falivene
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
13
0.765
Stratigraphy
Stratigraphic Forward Modeling
Reservoir Modeling
Deep Learning
Machine Learning
Antonino Cilona
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
14
13
0.929
Jürgen Grötsch
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
26
12
0.462
Geology
Geoscience
Sedimentology
Stratigraphy
Energy Resources
Henning Kuehl
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
11
0.611
geophysics
oil and gas exploration and development
Matteo Molinaro
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
13
11
0.846
Geology
Structural Geology
Petroleum geology
John M Martin
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
9
8
0.889
Jack Levell
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
13
7
0.538
Solar Photovoltaics
Geophysical Sensors
Organic Light Emitting Diodes