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IL State Geological Survey

Free

Illinois State Geological Survey ILOIL well registry plus oil/gas/storage field polygons and waterflood-area boundaries. ~207K wells with API, status, operator, formation, depth.

energywellsillinoisil-isgsillinois-basingas-storagestate-geological-surveyoil-and-gas
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What you can ask

  • “What does IL State Geological Survey have for the area or asset I'm working on?”
  • “Pull the most recent IL State Geological Survey records and put them in a table.”
  • “What does IL State Geological Survey cover, and how fresh is the data?”

About this source

Illinois State Geological Survey (ISGS) ILOIL well registry plus oil/gas/storage field polygons and waterflood-area boundaries via maps.isgs.illinois.edu. - searchWells ⭐ ~207K wells with API, status code+text, operator, formation, depth - searchOilGasFields ⭐ ~1K canonical 2024 unified oil + gas + gas-storage polygons (or ~550 legacy) - getWellByApi single well lookup, searchWaterfloodAreas, getServiceInfo §0 spec drift: brief listed Oil_Gas_GasStor_Fields_2023 — that service is 404. Canonical service is _2024. Wells layer is at index 8 of Wells/MapServer (NOT 0). STATUS column has 100+ codes; STATUS_TEXT has 100+ descriptive variants. Legacy service uses upper-snake fields, 2024 uses camelCase. Native CRS 102100; outSR=4326.

Connector ID il-isgs

Provenance

PublisherIL State Geological Survey
API basehttps://maps.isgs.illinois.edu/arcgis/rest/services/ILOIL

Freshness & coverage

FreshnessFreshness not declared
GeographicNot declared
TemporalNot declared
AuthenticationNo credentials required

› Methods (5)

Technical detail for developers: parameters, pagination, units, and freshness per method.

  • searchWells

    read

    Illinois oil and gas wells (~207K). Filter operator, status (code or text), formation, depth, bbox.

    Entitieswell

    STATUS code (OIL/OILP/DAP) and STATUS_TEXT descriptive both filterable.

  • searchOilGasFields

    read

    Field boundary polygons. Filter fieldName, fieldType (OIL/GAS/GAS STORAGE), bbox.

    Entitiesfield

    Default ~1K; legacy ~550. Max 5/page; records omit rings; GeoJSON generalized.

  • getWellByApi

    read

    Single well lookup by API_NUMBER (12-digit).

    Required paramsapi
    Entitieswell

  • searchWaterfloodAreas

    read

    Waterflood (secondary-recovery) area boundary polygons.

    Entitiesrecord

  • getServiceInfo

    read

    Schema, record counts, and enum values for all 4 services (IL State Geological Survey).

    Entitiesmetadata