Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: 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
9,429
3,891
0.413
* 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
6,754
2,655
0.393
* Total Citation Counts Rankings
Ranking Based On Selection :3
Geophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,861
2,227
0.380
* Total Citation Counts Rankings
Ranking Based On Selection :4
Microbiology
Biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,294
3,818
0.721
* Total Citation Counts Rankings
Ranking Based On Selection :5
Nonmetallic Composite Materials (Polymers and Fibers) processing and mechanical performance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,017
1,697
0.338
* Total Citation Counts Rankings
Ranking Based On Selection :6
Diversity & Inclusion
Occupational Health and Well-Being
Workplace Mistreatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,589
2,279
0.497
* Total Citation Counts Rankings
Ranking Based On Selection :7
petroleum engineering
enhanced oil recovery
CO2
phase behavior
PVT
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,531
1,877
0.414
* Total Citation Counts Rankings
Ranking Based On Selection :8
Petroleum engineering consultant
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,067
1,394
0.343
* Total Citation Counts Rankings
Ranking Based On Selection :9
Petrophysics
Formation Evaluation
Core Analysis
Reservoir Surveillance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,908
1,677
0.429
* Total Citation Counts Rankings
Ranking Based On Selection :10
Drilling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,670
2,489
0.678
* 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
3,609
1,483
0.411
* Total Citation Counts Rankings
Ranking Based On Selection :12
Fuel Cells
Fuel Processing
Carbon Management
SOFC
renewablehydrogen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,552
1,392
0.392
* Total Citation Counts Rankings
Ranking Based On Selection :13
Renewable Energy
CO2 Reduction
Sustainability
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,371
2,977
0.883
* Total Citation Counts Rankings
Ranking Based On Selection :14
Carbon Capture
utilization
Gasification
Sustainability
Marerial Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,368
2,687
0.798
* Total Citation Counts Rankings
Ranking Based On Selection :15
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,237
1,249
0.386
* Total Citation Counts Rankings
Ranking Based On Selection :16
structural geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,096
999
0.323
* Total Citation Counts Rankings
Ranking Based On Selection :17
IC engines
chemical kinetics
combustion
catalytic combustion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,865
2,210
0.771
* Total Citation Counts Rankings
Ranking Based On Selection :18
Waterflooding
Produced Water Management
CO2 Mineralization
IOR/EOR
Mineral Recovery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,768
1,739
0.628
* Total Citation Counts Rankings
Ranking Based On Selection :19
catalysis
alpha olefins and polyolefins
polycarbonates
CO2 chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,718
1,185
0.436
* Total Citation Counts Rankings
Ranking Based On Selection :20
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,679
1,471
0.549
* Total Citation Counts Rankings
Ranking Based On Selection :21
Nanoparticles Synthesis
Perovskite
TEM
Flow- and Electro-Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,658
2,026
0.762
* Total Citation Counts Rankings
Ranking Based On Selection :22
Combustion
Spray diagnostics
IC engines
Machine learning
Artificial intelligence
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,458
1,700
0.692
* Total Citation Counts Rankings
Ranking Based On Selection :23
Organic Geochemistry
Environmental Science
Environmental Analytical Chemistry
GCxGC
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,321
815
0.351
* Total Citation Counts Rankings
Ranking Based On Selection :24
Sensors
IoT
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,304
1,258
0.546
* Total Citation Counts Rankings
Ranking Based On Selection :25
Geology
Geochemsitry (Inorganic)
Carbon Sequestration
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,294
1,207
0.526
Dongkyu Cha
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,429
3,891
0.413
Guodong (David) Zhan
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,754
2,655
0.393
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
5,861
2,227
0.380
Magdy El-Said Mohamed Gad
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,294
3,818
0.721
Mahmoud A Dweib
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,017
1,697
0.338
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
4,589
2,279
0.497
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
4,531
1,877
0.414
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
4,067
1,394
0.343
Petroleum engineering consultant
Shouxiang Mark Ma
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,908
1,677
0.429
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
3,670
2,489
0.678
Mohamed Bouhrara
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,609
1,483
0.411
Nanomaterials Science & Engineering
Composite Materials Processing
Carbon Fibers Manufacturing
Automotive Lightweighting
Sai Katikaneni
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,552
1,392
0.392
Fuel Cells
Fuel Processing
Carbon Management
SOFC
renewablehydrogen
Issam Gereige
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,371
2,977
0.883
Renewable Energy
CO2 Reduction
Sustainability
Aqil Jamal
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,368
2,687
0.798
Carbon Capture
utilization
Gasification
Sustainability
Marerial Science
Ki-Hyouk Choi
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,237
1,249
0.386
Simon Stewart
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,096
999
0.323
Jihad Badra
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,865
2,210
0.771
Subhash Ayirala
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,768
1,739
0.628
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
2,718
1,185
0.436
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
2,679
1,471
0.549
Noktan Mohammed Alyami
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,658
2,026
0.762
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
2,458
1,700
0.692
Combustion
Spray diagnostics
IC engines
Machine learning
Artificial intelligence
Charles E West
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,321
815
0.351
Organic Geochemistry
Environmental Science
Environmental Analytical Chemistry
GCxGC
Chinthaka Pasan Gooneratne
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,304
1,258
0.546
Peng Lu
Saudi Arabian Oil Company
Dhahran, Saudi Arabia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,294
1,207
0.526
Geology
Geochemsitry (Inorganic)
Carbon Sequestration