Crude oil

https://www.wikidata.org/wiki/Q22656

Field Hierarchy

Parent
Engineering 25M papers	Geology 10.4M papers	Petroleum engineering 498k papers
Current
Crude oil 26.9k papers
Child
Midstream 1,721 papers	Demulsifier 1,530 papers	West Texas Intermediate 1,254 papers	API gravity 984 papers
Crack spread 963 papers	Oil-storage trade 910 papers	Brent Crude 852 papers

Trends

Notes

History