Lost Hills Oil Field
E614195
Lost Hills Oil Field is a major petroleum-producing area in California’s San Joaquin Valley, known for its heavy oil reserves and extensive drilling operations.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lost Hills Oil Field canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6706577 — 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: Lost Hills Oil Field Context triple: [Belridge Oil Field, near, Lost Hills Oil Field]
-
A.
Fruitvale Oil Field
Fruitvale Oil Field is a significant petroleum-producing area in Kern County, California, known for its long history of oil extraction within the southern San Joaquin Valley.
-
B.
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.
-
C.
Coalinga Oil Field
Coalinga Oil Field is a major petroleum-producing area in California’s San Joaquin Valley, historically significant for its early 20th-century oil boom and extensive heavy oil reserves.
-
D.
Belridge Oil Field
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.
-
E.
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.
- 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: Lost Hills Oil Field Target entity description: Lost Hills Oil Field is a major petroleum-producing area in California’s San Joaquin Valley, known for its heavy oil reserves and extensive drilling operations.
-
A.
Fruitvale Oil Field
Fruitvale Oil Field is a significant petroleum-producing area in Kern County, California, known for its long history of oil extraction within the southern San Joaquin Valley.
-
B.
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.
-
C.
Coalinga Oil Field
Coalinga Oil Field is a major petroleum-producing area in California’s San Joaquin Valley, historically significant for its early 20th-century oil boom and extensive heavy oil reserves.
-
D.
Belridge Oil Field
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.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | oil field ⓘ |
| climate | semi-arid ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| discovered | 1910 ⓘ |
| economicImportance |
local tax revenue
ⓘ
regional employment ⓘ |
| geologicalBasin | San Joaquin Basin NERFINISHED ⓘ |
| geologicalFormation |
Monterey Formation
NERFINISHED
ⓘ
diatomite reservoirs ⓘ |
| hasEnvironmentalConcern |
air emissions
ⓘ
produced water management ⓘ subsidence risk ⓘ |
| hasExtractionMethod |
primary recovery
ⓘ
steamflooding ⓘ thermal enhanced oil recovery ⓘ waterflooding ⓘ |
| hasInfrastructure |
gathering pipelines
ⓘ
injection wells ⓘ production wells ⓘ tank batteries ⓘ |
| hasOperator |
Aera Energy LLC
NERFINISHED
ⓘ
Chevron Corporation NERFINISHED ⓘ other independent operators ⓘ |
| hasProduction |
gas
ⓘ
oil ⓘ |
| hasResourceType |
heavy oil
ⓘ
natural gas ⓘ petroleum ⓘ |
| hasWellType |
directional wells
ⓘ
horizontal wells ⓘ vertical wells ⓘ |
| knownFor |
extensive drilling operations
ⓘ
heavy oil reserves ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Central Valley of California NERFINISHED ⓘ Kern County, California NERFINISHED ⓘ San Joaquin Valley NERFINISHED ⓘ |
| near | Lost Hills, California NERFINISHED ⓘ |
| oilGravity | heavy ⓘ |
| operatedIn | onshore ⓘ |
| partOf |
California oil and gas fields
NERFINISHED
ⓘ
U.S. onshore oil production ⓘ |
| productionStatus | producing ⓘ |
| regulatoryAuthority | California Geologic Energy Management Division NERFINISHED ⓘ |
| reservoirDepth | shallow to moderate depth ⓘ |
| terrain | flat agricultural and scrubland area ⓘ |
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: Lost Hills Oil Field Description of subject: Lost Hills Oil Field is a major petroleum-producing area in California’s San Joaquin Valley, known for its heavy oil reserves and extensive drilling operations.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.