Science Explorer Interactive view Map
Company · Tehran · Iran

National Iranian Oil Company (Iran)

In research, National Iranian Oil Company (Iran) stands highest in Physical Sciences (#4,953 of 12,888 worldwide) and Engineering (#3,263 of 6,636 worldwide), 2022–2025. Relative to its size it is most specialised in Ocean Engineering, Mechanics of Materials and Earth and Planetary Sciences — Ocean Engineering is 18.2× its share of world research.

en.nioc.ir/Portal/HomeROR OpenAlex
World rank, 2022–2025
#8,217
of 28,054 · #9,289 all time
Rank in Iran
#156
of 301
Research works
2k
▼ 27% vs 2013–17
Citations
33k
16.6 per fractional work
Top-10% rate
18.9%
record average 16.5%
Open access
28%
world 28%

What is National Iranian Oil Company (Iran) known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #4,953 of 12,888 19.2%240 #5857
EngineeringField #3,263 of 6,636 18.0%131 #4175

Each strip is that field’s whole ranked pool, with the notch where National Iranian Oil Company (Iran) sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

What does National Iranian Oil Company (Iran) specialise in?

Where its research is concentrated relative to its size: Ocean Engineering takes 18.2× the share of its output that it takes of world research.

  1. Ocean EngineeringSubfield · 27.4 works18×
  2. Mechanics of MaterialsSubfield · 24.3 works12×
  3. Earth and Planetary SciencesField · 37.9 works8.4×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.37× its world share, 5 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.20× its world share, 3 worksBiochemistry, Geneti…Immunology and Microbiology: 0.26× its world share, 1 worksImmunology and Micro…Neuroscience: 0.22× its world share, 1 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.02× its world share, 1 worksPharmacology, Toxico…Chemical Engineering: 3.96× its world share, 4 worksChemical EngineeringChemistry: 2.49× its world share, 11 worksChemistryComputer Science: 0.52× its world share, 12 worksComputer ScienceEarth and Planetary Sciences: 8.36× its world share, 38 worksEarth and Planetary …Energy: 3.04× its world share, 8 worksEnergyEngineering: 3.02× its world share, 131 worksEngineeringEnvironmental Science: 1.54× its world share, 22 worksEnvironmental ScienceMaterials Science: 1.25× its world share, 13 worksMaterials ScienceMathematics: 0.08× its world share, 0 worksMathematicsPhysics and Astronomy: 0.24× its world share, 2 worksPhysics and AstronomyDentistry: 0.26× its world share, 0 worksDentistryHealth Professions: 0.43× its world share, 3 worksHealth ProfessionsMedicine: 0.23× its world share, 12 worksMedicineNursing: 0.44× its world share, 1 worksNursingVeterinary: 1.27× its world share, 0 worksVeterinaryArts and Humanities: 0.14× its world share, 1 worksArts and HumanitiesBusiness, Management and Accounting: 0.31× its world share, 3 worksBusiness, Management…Decision Sciences: 1.58× its world share, 4 worksDecision SciencesEconomics, Econometrics and Finance: 0.69× its world share, 4 worksEconomics, Econometr…Psychology: 0.29× its world share, 3 worksPsychologySocial Sciences: 0.13× its world share, 5 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Earth and Planetary Sciences, 8.4×. Every wedge is a field page.

Who are the top researchers at National Iranian Oil Company (Iran)?

Ranked on the composite score, Shahab Gerami, Abouzar Mirzaei‐Paiaman and Akbar Zamaniyan lead among researchers whose main affiliation is National Iranian Oil Company (Iran).

  1. 1 Shahab Gerami Iran · #574,768 worldwide 58 citations · 22 works
  2. 2 Abouzar Mirzaei‐Paiaman Iran · #693,012 worldwide 68 citations · 15 works
  3. 3 Akbar Zamaniyan Iran · #977,400 worldwide 88 citations · 16 works
All ranked researchers at National Iranian Oil Company (Iran)

Which keywords describe research at National Iranian Oil Company (Iran)?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Gas Permeability, Shale Gas, Pore Structure, Mudstones, Thermal Maturity, Hydraulic Fracturing, Fracture Propagation and Shale Gas Reservoirs.

▲ more of its work than of the world’s◆ about the world’s share▼ less than the world’s

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Gas Permeability21▲ 72×2 topics
  2. Machine Learning20▲ 2.1×31 topics
  3. Shale Gas20▲ 55×2 topics
  4. Pore Structure19▲ 54×2 topics
  5. Mudstones19▲ 86×1 topic
  6. Thermal Maturity19▲ 86×1 topic
  7. Hydraulic Fracturing16▲ 51×2 topics
  8. Nanoparticles16▲ 4.4×21 topics
  9. Fracture Propagation16▲ 88×1 topic
  10. Shale Gas Reservoirs16▲ 88×1 topic
  11. CO2 Sequestration10▲ 19×4 topics
  12. Remote Sensing10▲ 3.0×15 topics
  13. Optimization10▲ 7.2×11 topics
  14. Rheological Properties9▲ 18×5 topics
  15. Vibration Analysis9▲ 12×3 topics
  16. Drilling Fluids8▲ 53×1 topic
  17. Well Integrity8▲ 53×1 topic
  18. Support Vector Machines8▲ 9.0×6 topics
  19. Surfactants8▲ 28×4 topics
  20. Porous Media8▲ 21×3 topics
  21. Tectonics8▲ 22×3 topics
  22. Nanofluids8▲ 31×2 topics
  23. Plate Tectonics7▲ 16×3 topics
  24. Data Assimilation7▲ 16×2 topics
  25. Ensemble Kalman Filter7▲ 24×1 topic
  26. Well Placement7▲ 53×1 topic
  27. Geological Mapping7▲ 29×2 topics
  28. Pore-scale Modeling7▲ 66×1 topic
  29. X-ray Computed Tomography7▲ 66×1 topic
  30. Hyperspectral Imaging7▲ 8.1×2 topics
  31. Compositional Data Analysis7▲ 34×1 topic
  32. Mineral Prospectivity7▲ 34×1 topic
  33. Metal Recovery6▲ 10×3 topics
  34. Petroleum6▲ 41×2 topics
  35. Geophysical Imaging6▲ 36×2 topics
  36. Thermodynamic Modeling6▲ 17×3 topics
  37. Paleoproductivity5▲ 65×1 topic
  38. Paleoredox5▲ 65×1 topic
  39. Elastic Properties5▲ 23×2 topics
  40. Full-Waveform Tomography5▲ 41×1 topic

Which research topics does National Iranian Oil Company (Iran) publish most on?

By volume in 2022–2025: Hydrocarbon exploration and reservoir analysis, Hydraulic Fracturing and Reservoir Analysis, Drilling and Well Engineering and Reservoir Engineering and Simulation Methods.

Hydrocarbon exploration …19Hydrocarbon exploration and reservoir analysis: 19 fractional worksHydraulic Fracturing and Reservoir Analysis: 16 fractional worksDrilling and Well Engineering: 8 fractional worksReservoir Engineering and Simulation Methods: 7 fractional worksEnhanced Oil Recovery Techniques: 7 fractional worksGeochemistry and Geologi…7Geochemistry and Geologic Mapping: 7 fractional worksPaleontology and Stratigraphy of Fossils: 5 fractional worksSeismic Imaging and Inversion Techniques: 5 fractional worksGeological and Geochemical Analysis: 4 fractional worksPetroleum Processing and Analysis: 4 fractional works
Mechanics of MaterialsMechanical EngineeringOcean EngineeringArtificial Intelligence3 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Hydrocarbon exploration and reservoir analysis Mechanics of Materials 19 works
  2. 2 Hydraulic Fracturing and Reservoir Analysis Mechanical Engineering 16 works
  3. 3 Drilling and Well Engineering Ocean Engineering 8 works
  4. 4 Reservoir Engineering and Simulation Methods Ocean Engineering 7 works
  5. 5 Enhanced Oil Recovery Techniques Ocean Engineering 7 works
  6. 6 Geochemistry and Geologic Mapping Artificial Intelligence 7 works
  7. 7 Paleontology and Stratigraphy of Fossils Paleontology 5 works
  8. 8 Seismic Imaging and Inversion Techniques Geophysics 5 works
  9. 9 Geological and Geochemical Analysis Geophysics 4 works
  10. 10 Petroleum Processing and Analysis Analytical Chemistry 4 works

How open and international is its research?

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available27.5%not open72.5%

World: 28% of research is openly available.

with international co-authors18.5%domestic only81.5%

World: 19% is written across borders.

How has National Iranian Oil Company (Iran)'s research output changed?

Output in 2018–2022 was 27% lower than in 2013–2017.

1990200020102020
grewheldshrank

The same series as a ribbon — one cell per year, darker for more. The line above answers how much; this answers when.

Other research institutions in Tehran

All research institutions in Tehran

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.