The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection :1
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,520
3,979
0.418
* Total Citation Counts Rankings
Ranking Based On Selection :2
Advanced Drilling Technology
Hard and Superhard Materials
Additive Manufacturing
Nanomaterials and Nanotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,734
2,627
0.390
* Total Citation Counts Rankings
Ranking Based On Selection :3
Geophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,938
2,302
0.388
* Total Citation Counts Rankings
Ranking Based On Selection :4
Nonmetallic Composite Materials (Polymers and Fibers) processing and mechanical performance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,083
1,756
0.345
* Total Citation Counts Rankings
Ranking Based On Selection :5
Diversity & Inclusion
Occupational Health and Well-Being
Workplace Mistreatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,711
2,391
0.508
* Total Citation Counts Rankings
Ranking Based On Selection :6
petroleum engineering
enhanced oil recovery
CO2
phase behavior
PVT
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,590
1,929
0.420
* Total Citation Counts Rankings
Ranking Based On Selection :7
Petroleum engineering consultant
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,075
1,403
0.344
* Total Citation Counts Rankings
Ranking Based On Selection :8
Petrophysics
Formation Evaluation
Core Analysis
Reservoir Surveillance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,984
1,746
0.438
* Total Citation Counts Rankings
Ranking Based On Selection :9
Drilling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,774
2,584
0.685
* Total Citation Counts Rankings
Ranking Based On Selection :10
Fuel Cells
Fuel Processing
Carbon Management
SOFC
renewablehydrogen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,661
1,499
0.409
* Total Citation Counts Rankings
Ranking Based On Selection :11
Nanomaterials Science & Engineering
Composite Materials Processing
Carbon Fibers Manufacturing
Automotive Lightweighting
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,650
1,529
0.419
* Total Citation Counts Rankings
Ranking Based On Selection :12
Carbon Capture
utilization
Gasification
Sustainability
Marerial Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,594
2,912
0.810
* Total Citation Counts Rankings
Ranking Based On Selection :13
Renewable Energy
CO2 Reduction
Sustainability
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,525
3,130
0.888
* Total Citation Counts Rankings
Ranking Based On Selection :14
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,252
1,263
0.388
* Total Citation Counts Rankings
Ranking Based On Selection :15
structural geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,160
1,051
0.333
* Total Citation Counts Rankings
Ranking Based On Selection :16
IC engines
chemical kinetics
combustion
catalytic combustion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,925
2,268
0.775
* Total Citation Counts Rankings
Ranking Based On Selection :17
Waterflooding
Produced Water Management
CO2 Mineralization
IOR/EOR
Mineral Recovery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,830
1,804
0.637
* Total Citation Counts Rankings
Ranking Based On Selection :18
catalysis
alpha olefins and polyolefins
polycarbonates
CO2 chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,752
1,221
0.444
* Total Citation Counts Rankings
Ranking Based On Selection :19
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,723
1,513
0.556
* Total Citation Counts Rankings
Ranking Based On Selection :20
Nanoparticles Synthesis
Perovskite
TEM
Flow- and Electro-Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,711
2,078
0.767
* Total Citation Counts Rankings
Ranking Based On Selection :21
Combustion
Spray diagnostics
IC engines
Machine learning
Artificial intelligence
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,536
1,776
0.700
* Total Citation Counts Rankings
Ranking Based On Selection :22
Geology
Geochemsitry (Inorganic)
Carbon Sequestration
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,362
1,272
0.539
* Total Citation Counts Rankings
Ranking Based On Selection :23
Sensors
IoT
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,353
1,298
0.552
* Total Citation Counts Rankings
Ranking Based On Selection :24
Organic Geochemistry
Environmental Science
Environmental Analytical Chemistry
GCxGC
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,326
820
0.353
* Total Citation Counts Rankings
Ranking Based On Selection :25
Heterogeneous Catalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,325
1,341
0.577
Dongkyu Cha
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,520
3,979
0.418
Guodong (David) Zhan
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,734
2,627
0.390
Advanced Drilling Technology
Hard and Superhard Materials
Additive Manufacturing
Nanomaterials and Nanotechnology
Andrey Bakulin
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,938
2,302
0.388
Mahmoud A Dweib
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,083
1,756
0.345
Nonmetallic Composite Materials (Polymers and Fibers) processing and mechanical performance
Kathi Miner
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,711
2,391
0.508
Diversity & Inclusion
Occupational Health and Well-Being
Workplace Mistreatment
Sunil Kokal
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,590
1,929
0.420
petroleum engineering
enhanced oil recovery
CO2
phase behavior
PVT
Sameeh Batarseh
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,075
1,403
0.344
Petroleum engineering consultant
Shouxiang Mark Ma
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,984
1,746
0.438
Petrophysics
Formation Evaluation
Core Analysis
Reservoir Surveillance
Md Amanullah
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,774
2,584
0.685
Sai Katikaneni
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,661
1,499
0.409
Fuel Cells
Fuel Processing
Carbon Management
SOFC
renewablehydrogen
Mohamed Bouhrara
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,650
1,529
0.419
Nanomaterials Science & Engineering
Composite Materials Processing
Carbon Fibers Manufacturing
Automotive Lightweighting
Aqil Jamal
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,594
2,912
0.810
Carbon Capture
utilization
Gasification
Sustainability
Marerial Science
Issam Gereige
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,525
3,130
0.888
Renewable Energy
CO2 Reduction
Sustainability
Ki-Hyouk Choi
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,252
1,263
0.388
Simon Stewart
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,160
1,051
0.333
Jihad Badra
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,925
2,268
0.775
Subhash Ayirala
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,830
1,804
0.637
Waterflooding
Produced Water Management
CO2 Mineralization
IOR/EOR
Mineral Recovery
Wei Xu
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,752
1,221
0.444
catalysis
alpha olefins and polyolefins
polycarbonates
CO2 chemistry
Junseok Chang
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,723
1,513
0.556
Noktan Mohammed Alyami
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,711
2,078
0.767
Nanoparticles Synthesis
Perovskite
TEM
Flow- and Electro-Chemistry
Balaji Mohan
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,536
1,776
0.700
Combustion
Spray diagnostics
IC engines
Machine learning
Artificial intelligence
Peng Lu
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,362
1,272
0.539
Geology
Geochemsitry (Inorganic)
Carbon Sequestration
Chinthaka Pasan Gooneratne
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,353
1,298
0.552
Charles E West
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,326
820
0.353
Organic Geochemistry
Environmental Science
Environmental Analytical Chemistry
GCxGC
Christos M Kalamaras
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,325
1,341
0.577