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
Petroleum system analysis
Basin Modeling
Petroleum Geochemistry
Petroleum Reservoir Rocks
Coal
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,218
3,086
0.732
* Total Citation Counts Rankings
Ranking Based On Selection :2
Structural Geology and Tectonics
Remote Sensing and GIS
Environmental Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,229
544
0.443
* Total Citation Counts Rankings
Ranking Based On Selection :3
Petroleum Engineering
Formation damage
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
593
332
0.560
* Total Citation Counts Rankings
Ranking Based On Selection :4
Drilling fluids
Non-Newtonian Fluid Rheology
Drilling Hydraulics
Surfactant Adsorption
Drilling Waste
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
374
210
0.561
* Total Citation Counts Rankings
Ranking Based On Selection :5
Petroleum Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
178
169
0.949
* Total Citation Counts Rankings
Ranking Based On Selection :6
Properties of Reservoir Fluids
Rocks and reservoir characterization
Well testing
Surface production operation
Artificial intelligence and machine learning in petroleum engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36
34
0.944
Mohammed Hail Hakimi
Taiz University
Taiz, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,218
3,086
0.732
Petroleum system analysis
Basin Modeling
Petroleum Geochemistry
Petroleum Reservoir Rocks
Coal
Khaled Khanbari
Sana'a University
Sana'a, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,229
544
0.443
Structural Geology and Tectonics
Remote Sensing and GIS
Environmental Geology
Amer Badr Binmerdhah
Hadhramout University
Mukalla, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
593
332
0.560
Petroleum Engineering
Formation damage
Mazen Ahmed Muherei
Hadhramout University
Mukalla, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
374
210
0.561
Drilling fluids
Non-Newtonian Fluid Rheology
Drilling Hydraulics
Surfactant Adsorption
Drilling Waste
Salem Obaid Baarimah
Hadhramout University
Mukalla, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
178
169
0.949
Petroleum Engineering
Abbas Mohamed Al-Khudafi
Hadhramout University
Mukalla, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
36
34
0.944
Properties of Reservoir Fluids
Rocks and reservoir characterization
Well testing
Surface production operation
Artificial intelligence and machine learning in petroleum engineering