Belridge Oil Field
E153020
Belridge Oil Field is one of California’s largest and most productive oil fields, located in the San Joaquin Valley and known for its extensive heavy oil and enhanced recovery operations.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Belridge Oil Field canonical | 6 |
| South Belridge Oil Field | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T1310662 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Belridge Oil Field Context triple: [Kern County, containsOilField, Belridge Oil Field]
-
A.
Elk Hills oil field
The Elk Hills oil field is a major petroleum reserve in California that gained historical notoriety for its central role in the Teapot Dome scandal, one of the most infamous corruption cases in U.S. political history.
-
B.
Midway-Sunset Oil Field
Midway-Sunset Oil Field is one of California’s largest and oldest producing oil fields, located in the southern San Joaquin Valley.
-
C.
Kern River Oil Field
Kern River Oil Field is one of California’s largest and oldest producing oil fields, located near Bakersfield in Kern County.
-
D.
Teapot Dome oil field
The Teapot Dome oil field is a federally owned petroleum reserve in Wyoming that became infamous as the center of a major 1920s U.S. political corruption scandal.
-
E.
Montrose Basin
Montrose Basin is a large tidal estuary and wildlife reserve on Scotland’s east coast, renowned for its rich birdlife and coastal habitats.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Belridge Oil Field Target entity description: Belridge Oil Field is one of California’s largest and most productive oil fields, located in the San Joaquin Valley and known for its extensive heavy oil and enhanced recovery operations.
-
A.
Elk Hills oil field
The Elk Hills oil field is a major petroleum reserve in California that gained historical notoriety for its central role in the Teapot Dome scandal, one of the most infamous corruption cases in U.S. political history.
-
B.
Midway-Sunset Oil Field
Midway-Sunset Oil Field is one of California’s largest and oldest producing oil fields, located in the southern San Joaquin Valley.
-
C.
Kern River Oil Field
Kern River Oil Field is one of California’s largest and oldest producing oil fields, located near Bakersfield in Kern County.
-
D.
Teapot Dome oil field
The Teapot Dome oil field is a federally owned petroleum reserve in Wyoming that became infamous as the center of a major 1920s U.S. political corruption scandal.
-
E.
Montrose Basin
Montrose Basin is a large tidal estuary and wildlife reserve on Scotland’s east coast, renowned for its rich birdlife and coastal habitats.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
hydrocarbon reservoir
ⓘ
oil field ⓘ |
| approximateUltimateRecovery | over 1 billion barrels of oil (order of magnitude) ⓘ |
| contains |
heavy crude oil
ⓘ
light crude oil (deeper zones) ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| developmentMethod |
cyclic steam stimulation
ⓘ
pattern steam injection ⓘ water injection ⓘ |
| discovered | 1911 ⓘ |
| economicImportance | major contributor to California oil production ⓘ |
| environmentalConcern |
greenhouse gas emissions from steam generation
ⓘ
land disturbance from dense well spacing ⓘ |
| formerOperator |
Belridge Oil Company
ⓘ
Shell Oil Company ⓘ |
| geologicAge |
Miocene
ⓘ
Pliocene ⓘ
linked to:
Pliocene epoch
|
| hasReservoirDriveMechanism |
solution gas drive (primary)
ⓘ
thermal enhanced oil recovery (secondary) ⓘ waterflood (secondary) ⓘ |
| hasWellType |
directional wells
ⓘ
vertical wells ⓘ |
| infrastructure |
gathering pipelines
ⓘ
processing facilities ⓘ steam generators ⓘ |
| knownFor |
enhanced oil recovery
ⓘ
heavy oil production ⓘ large number of producing wells ⓘ steamflood operations ⓘ waterflood operations ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
Kern County, California ⓘ
linked to:
Kern County
San Joaquin Valley ⓘ |
| near |
Elk Hills Oil Field
ⓘ
linked to:
Elk Hills oil field
Lost Hills Oil Field ⓘ South Belridge Oil Field ⓘ
linked to:
Belridge Oil Field
|
| operator | Aera Energy LLC ⓘ |
| ownedBy |
ExxonMobil (through Aera Energy LLC joint venture)
ⓘ
Shell Oil Company ⓘ |
| partOf | San Joaquin Valley oil fields ⓘ |
| primaryProducingFormation |
Diablo Formation
ⓘ
Etchegoin Formation ⓘ Temblor Formation ⓘ |
| productionType | onshore ⓘ |
| rankInCalifornia |
one of the largest oil fields by reserves
ⓘ
one of the most productive oil fields by cumulative production ⓘ |
| region |
San Joaquin Basin
ⓘ
linked to:
San Joaquin River Basin
|
| resourceType | petroleum ⓘ |
| startOfLargeScaleSteamflood | 1970s ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Belridge Oil Field Description of subject: Belridge Oil Field is one of California’s largest and most productive oil fields, located in the San Joaquin Valley and known for its extensive heavy oil and enhanced recovery operations.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Belridge Oil Field
linked to: Belridge Oil Field
linked to: Belridge Oil Field
linked to: Belridge Oil Field