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
Petroleum Engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
24
0.960
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :2
formation testing
well logging
petrophysics
petroleum engineering
technology innovation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
21
0.313
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :3
Digital Rock
Geomechanics
Rock Physics
Petrology
Petrophysics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
16
0.889
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :4
Geomechanics
petroleum engineering
hydraulic fracturing
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
15
0.833
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :5
Inorganic Chemistry
Catalysis
Chemical Engineering
Material Science
Petroleum Engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
14
0.500
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :6
Petroleum Engineering
Condensed Matter Physics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
12
0.600
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :7
Petroleum engineering
petrophysics
digital technology
data management
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
5
2
0.400
* Last 6 Years i10 IndexRankings
Ranking Based On Selection :8
Petroleum Engineering
Adsorption
Carbon sequestration
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
3
1
0.333
Ramez A Nasralla
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
24
0.960
Petroleum Engineering
Hani Elshahawi
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
21
0.313
formation testing
well logging
petrophysics
petroleum engineering
technology innovation
Amie Lucier Hows
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
16
0.889
Digital Rock
Geomechanics
Rock Physics
Petrology
Petrophysics
Alexei Savitski
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
15
0.833
Geomechanics
petroleum engineering
hydraulic fracturing
Michael A Reynolds
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
28
14
0.500
Inorganic Chemistry
Catalysis
Chemical Engineering
Material Science
Petroleum Engineering
Tibi Sorop
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
12
0.600
Petroleum Engineering
Condensed Matter Physics
Abhijit Mookerjee
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
5
2
0.400
Petroleum engineering
petrophysics
digital technology
data management
Sanyog Kumar
Royal Dutch Shell
Houston, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
3
1
0.333
Petroleum Engineering
Adsorption
Carbon sequestration