{
  "dataset": "force_2020",
  "description": "Wireline and LWD well logs from 108 Norwegian North Sea wells, with an interpreted lithology label per sample \u2014 the FORCE 2020 Machine Predicted Lithology challenge corpus, republished as one Parquet file per well.",
  "upstream": {
    "name": "FORCE 2020 Machine Predicted Lithology challenge",
    "url": "https://github.com/bolgebrygg/Force-2020-Machine-Learning-competition",
    "license": "CC BY 4.0"
  },
  "tables": {
    "wells": {
      "description": "One row per ~0.15 m log sample. Published as one file per well under `wells/<well>.parquet` (a flat multi-parquet table per ADR-0004: no Hive key, discovery via `wells/_files.json`).",
      "layout": "wells/<well>.parquet",
      "files_manifest": "wells/_files.json",
      "columns": [
        {
          "name": "WELL",
          "type": "VARCHAR",
          "unit": null,
          "not_null": true,
          "primary_key": true
        },
        {
          "name": "DEPTH_MD",
          "type": "DOUBLE",
          "unit": "m",
          "not_null": true,
          "primary_key": true
        },
        {
          "name": "X_LOC",
          "type": "DOUBLE",
          "unit": "m",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "Y_LOC",
          "type": "DOUBLE",
          "unit": "m",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "Z_LOC",
          "type": "DOUBLE",
          "unit": "m",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "GROUP",
          "type": "VARCHAR",
          "unit": null,
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "FORMATION",
          "type": "VARCHAR",
          "unit": null,
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "CALI",
          "type": "DOUBLE",
          "unit": "in",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "RSHA",
          "type": "DOUBLE",
          "unit": "ohm\u00b7m",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "RMED",
          "type": "DOUBLE",
          "unit": "ohm\u00b7m",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "RDEP",
          "type": "DOUBLE",
          "unit": "ohm\u00b7m",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "RHOB",
          "type": "DOUBLE",
          "unit": "g/cm\u00b3",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "GR",
          "type": "DOUBLE",
          "unit": "gAPI",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "SGR",
          "type": "DOUBLE",
          "unit": "gAPI",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "NPHI",
          "type": "DOUBLE",
          "unit": "v/v",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "PEF",
          "type": "DOUBLE",
          "unit": "b/e",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "DTC",
          "type": "DOUBLE",
          "unit": "\u00b5s/ft",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "SP",
          "type": "DOUBLE",
          "unit": "mV",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "BS",
          "type": "DOUBLE",
          "unit": "in",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "ROP",
          "type": "DOUBLE",
          "unit": "m/h",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "DTS",
          "type": "DOUBLE",
          "unit": "\u00b5s/ft",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "DCAL",
          "type": "DOUBLE",
          "unit": "in",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "DRHO",
          "type": "DOUBLE",
          "unit": "g/cm\u00b3",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "MUDWEIGHT",
          "type": "DOUBLE",
          "unit": "g/cm\u00b3",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "RMIC",
          "type": "DOUBLE",
          "unit": "ohm\u00b7m",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "ROPA",
          "type": "DOUBLE",
          "unit": "m/h",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "RXO",
          "type": "DOUBLE",
          "unit": "ohm\u00b7m",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "FORCE_2020_LITHOFACIES_LITHOLOGY",
          "type": "BIGINT",
          "unit": "code",
          "not_null": false,
          "primary_key": false
        },
        {
          "name": "dataset",
          "type": "VARCHAR",
          "unit": null,
          "not_null": false,
          "primary_key": false
        }
      ],
      "primary_key": [
        "WELL",
        "DEPTH_MD"
      ],
      "foreign_keys": []
    }
  },
  "lithology_labels": {
    "30000": "Sandstone",
    "65000": "Shale",
    "65030": "Sandstone/Shale",
    "70000": "Limestone",
    "70032": "Chalk",
    "74000": "Dolomite",
    "80000": "Marl",
    "86000": "Anhydrite",
    "88000": "Halite",
    "90000": "Coal",
    "93000": "Basement",
    "99000": "Tuff"
  }
}