Total 2,384,773 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,
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* Total i10 IndexRankings
Ranking Based On Selection: 1
Geophysics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
106
47
0.443
* Total i10 IndexRankings
Ranking Based On Selection: 2
Drilling
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
101
70
0.693
* Total i10 IndexRankings
Ranking Based On Selection: 3
Advanced Drilling Technology
Hard and Superhard Materials
Additive Manufacturing
Nanomaterials and Nanotechnology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
83
42
0.506
* Total i10 IndexRankings
Ranking Based On Selection: 4
Petroleum engineering consultant
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
82
49
0.598
* Total i10 IndexRankings
Ranking Based On Selection: 5
petroleum engineering
enhanced oil recovery
CO2
phase behavior
PVT
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
74
40
0.541
* Total i10 IndexRankings
Ranking Based On Selection: 6
IC engines
chemical kinetics
combustion
catalytic combustion
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
68
61
0.897
* Total i10 IndexRankings
Ranking Based On Selection: 7
Waterflooding
Produced Water Management
CO2 Mineralization
IOR/EOR
Mineral Recovery
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
68
54
0.794
* Total i10 IndexRankings
Ranking Based On Selection: 8
Petrophysics
Formation Evaluation
Core Analysis
Reservoir Surveillance
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
66
32
0.485
* Total i10 IndexRankings
Ranking Based On Selection: 9
Oilfield chemicals
Drilling fluids
Cementing
Loss circulation materials
Surfactants
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
65
44
0.677
* Total i10 IndexRankings
Ranking Based On Selection: 10
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
64
38
0.594
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* Total i10 IndexRankings
Ranking Based On Selection: 11
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
62
43
0.694
* Total i10 IndexRankings
Ranking Based On Selection: 12
structural geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
62
29
0.468
* Total i10 IndexRankings
Ranking Based On Selection: 13
Carbon Capture
utilization
Gasification
Sustainability
Marerial Science
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
58
49
0.845
* Total i10 IndexRankings
Ranking Based On Selection: 14
catalysis
alpha olefins and polyolefins
polycarbonates
CO2 chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
58
31
0.534
* Total i10 IndexRankings
Ranking Based On Selection: 15
Sensors
IoT
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
57
37
0.649
* Total i10 IndexRankings
Ranking Based On Selection: 16
Fuel Cells
Fuel Processing
Carbon Management
SOFC
renewablehydrogen
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
38
0.731
* Total i10 IndexRankings
Ranking Based On Selection: 17
Subsurface Sensors and Systems
Wireless Sensors
RF Circuits
Energy Harvesting
SoC and SoP
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
36
0.692
* Total i10 IndexRankings
Ranking Based On Selection: 18
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
39
0.813
* Total i10 IndexRankings
Ranking Based On Selection: 19
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
39
0.813
* Total i10 IndexRankings
Ranking Based On Selection: 20
Combustion
Spray diagnostics
IC engines
Machine learning
Artificial intelligence
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
47
44
0.936
* Total i10 IndexRankings
Ranking Based On Selection: 21
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
47
32
0.681
* Total i10 IndexRankings
Ranking Based On Selection: 22
Flow in Porous Media
Reservoir Simulation
Enhanced Oil Recovery
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
46
41
0.891
* Total i10 IndexRankings
Ranking Based On Selection: 23
Geophysics
Joint Inversion
Seismic
Electromagnetics
Gravity
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
46
24
0.522
* Total i10 IndexRankings
Ranking Based On Selection: 24
fluid mechanics
oil production
flow sensors
computational fluids
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
45
22
0.489
* Total i10 IndexRankings
Ranking Based On Selection: 25
reservoir simulation
scientific computing
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
45
21
0.467
Andrey Bakulin
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
106
47
0.443
Md Amanullah
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
101
70
0.693
Guodong (David) Zhan
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
83
42
0.506
Advanced Drilling Technology
Hard and Superhard Materials
Additive Manufacturing
Nanomaterials and Nanotechnology
Sameeh Batarseh
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
82
49
0.598
Petroleum engineering consultant
Sunil Kokal
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
74
40
0.541
petroleum engineering
enhanced oil recovery
CO2
phase behavior
PVT
Jihad Badra
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
68
61
0.897
Subhash Ayirala
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
68
54
0.794
Waterflooding
Produced Water Management
CO2 Mineralization
IOR/EOR
Mineral Recovery
Shouxiang Mark Ma
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
66
32
0.485
Petrophysics
Formation Evaluation
Core Analysis
Reservoir Surveillance
Vikrant Wagle
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
65
44
0.677
Oilfield chemicals
Drilling fluids
Cementing
Loss circulation materials
Surfactants
Ki-Hyouk Choi
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
64
38
0.594
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Dongkyu Cha
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
62
43
0.694
Simon Stewart
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
62
29
0.468
Aqil Jamal
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
58
49
0.845
Carbon Capture
utilization
Gasification
Sustainability
Marerial Science
Wei Xu
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
58
31
0.534
catalysis
alpha olefins and polyolefins
polycarbonates
CO2 chemistry
Chinthaka Pasan Gooneratne
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
57
37
0.649
Sai Katikaneni
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
38
0.731
Fuel Cells
Fuel Processing
Carbon Management
SOFC
renewablehydrogen
Muhammad Arsalan
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
52
36
0.692
Subsurface Sensors and Systems
Wireless Sensors
RF Circuits
Energy Harvesting
SoC and SoP
Junseok Chang
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
39
0.813
Ayman R Al-Nakhli
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
39
0.813
Balaji Mohan
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
47
44
0.936
Combustion
Spray diagnostics
IC engines
Machine learning
Artificial intelligence
Hyung Kwak
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
47
32
0.681
Abdulkareem M Alsofi
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
46
41
0.891
Flow in Porous Media
Reservoir Simulation
Enhanced Oil Recovery
Daniele Colombo
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
46
24
0.522
Geophysics
Joint Inversion
Seismic
Electromagnetics
Gravity
Mohamed Nabil Noui-Mehidi
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
45
22
0.489
fluid mechanics
oil production
flow sensors
computational fluids
Larry Fung
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
45
21
0.467