{
  "oil_resources": {
    "major_oil_field": {
      "display_name": "Major Oil Field",
      "description": "Large petroleum reservoir with high pressure and excellent crude quality",
      "formation_type": "deep_carboniferous_compression_with_geological_trap",
      "extraction_difficulty": "hard",
      "budget_impact": 5,
      "resource_yield": "very_high",
      "quality": "premium"
    },
    "oil_well": {
      "display_name": "Oil Well",
      "description": "Standard petroleum deposit accessible through drilling operations",
      "formation_type": "carboniferous_compression_with_geological_trap",
      "extraction_difficulty": "medium",
      "budget_impact": 4,
      "resource_yield": "high",
      "quality": "standard"
    },
    "shallow_oil_pocket": {
      "display_name": "Shallow Oil Pocket",
      "description": "Surface-near petroleum deposit with easier access but lower pressure",
      "formation_type": "shallow_carboniferous_trap",
      "extraction_difficulty": "easy",
      "budget_impact": 3,
      "resource_yield": "medium",
      "quality": "standard"
    },
    "oil_seep": {
      "display_name": "Oil Seep",
      "description": "Natural petroleum surface emergence indicating deeper reserves",
      "formation_type": "surface_petroleum_migration",
      "extraction_difficulty": "very_easy",
      "budget_impact": 2,
      "resource_yield": "low",
      "quality": "medium"
    },
    "tar_sands": {
      "display_name": "Tar Sands",
      "description": "Heavy oil mixed with sand requiring specialized extraction methods",
      "formation_type": "degraded_petroleum_in_sandstone",
      "extraction_difficulty": "very_hard",
      "budget_impact": 3,
      "resource_yield": "high",
      "quality": "low"
    },
    "offshore_oil": {
      "display_name": "Offshore Oil",
      "description": "Underwater petroleum reservoir requiring marine drilling platforms",
      "formation_type": "submerged_carboniferous_compression",
      "extraction_difficulty": "very_hard",
      "budget_impact": 4,
      "resource_yield": "high",
      "quality": "premium"
    },
    "shale_oil": {
      "display_name": "Shale Oil",
      "description": "Oil trapped in shale rock formations requiring hydraulic fracturing",
      "formation_type": "carboniferous_matter_in_shale",
      "extraction_difficulty": "very_hard",
      "budget_impact": 3,
      "resource_yield": "medium",
      "quality": "medium"
    }
  }
}