SIC 1311 — Crude Petroleum and Natural Gas
Official OSHA SIC Manual Definition
Establishments primarily engaged in operating oil and gas field properties. Such activities may include exploration for crude petroleum and natural gas; drilling, completing, and equipping wells; operation of separators, emulsion breakers, desilting equipment, and field gathering lines for crude petroleum; and all other activities in the preparation of oil and gas up to the point of shipment from the producing property. This industry includes the production of oil through the mining and extraction of oil from oil shale and oil sands and the production of gas and hydrocarbon liquids through gasification, liquid faction, and pyrolysis of coal at the mine site. Also included are establishments which have complete responsibility for operating oil and gas wells for others on a contract or fee basis. Establishments primarily engaged in performing oil field services for operators on a contract or fee basis are classified in Industry Group 138.
Description & Classification
SIC code 1311 representing 'Crude Petroleum and Natural Gas' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 211120 - Crude Petroleum Extraction (via SIC1987:1311→NAICS1997:211111→2002:211111→2007:211111→2012:211111→2017:211120→2022:211120)
- NAICS 211130 - Natural Gas Extraction (via SIC1987:1311→NAICS1997:211111→2002:211111→2007:211111→2012:211111→2017:211130→2022:211130)
Classification Details
| SIC Code | 1311 |
|---|---|
| Industry Title | Crude Petroleum and Natural Gas |
| Division | Division B: Mining |
| Major Group | Major Group 13: Oil and Gas Extraction |
| JSON Endpoint | View as JSON · API → |
| Source / Verified | US Census 1987 SIC Concordance / 2026-08-08 |
SIC vs NAICS Compliance & Common Mismatches
Legacy SIC code 1311 classifies commercial operations based on primary end-product or service output under the 1987 federal framework. In contrast, modern 2022 NAICS codes group establishments based on production process inputs.
When submitting public disclosures to SEC EDGAR or determining OSHA workplace safety log recordkeeping exemptions (29 CFR Part 1904), rely strictly on the official OSHA 4-digit SIC classification rather than an automated commercial translation.
💡 Expert Guidance: SIC to NAICS Conversion
Common Compliance Mistake: Many contractors and B2B analysts confuse legacy 4-digit SIC codes like 1311 with modern 6-digit NAICS codes. Ensure that you use the correct active 2022 NAICS code (e.g. from the crosswalk below) when submitting representations on SAM.gov, as federal contracting officers only accept modern NAICS codes.
Related Pages & Tools
Further regulatory reference links for legacy SIC code 1311:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC 1311 to NAICS Crosswalk — Bidirectional mapping to modern NAICS codes (Crude Petroleum and Natural Gas).
- SIC Code for Oil and Gas Extraction — Standard Industrial Classification mapping details.
- SIC Major Group 13 Hub — View other legacy industries in this business division.
Frequently Asked Questions (FAQ)
What industry sector is represented by legacy SIC code 1311? ▾
Legacy SIC code 1311 represents 'Crude Petroleum and Natural Gas', categorized under Division Division B: Mining and Major Group Major Group 13: Oil and Gas Extraction. The Standard Industrial Classification (SIC) system was developed in the late 1930s.
What is the modern 2022 NAICS equivalent for legacy SIC 1311? ▾
Legacy SIC code 1311 maps to the modern 2022 NAICS industry classifications: NAICS 211120 (Crude Petroleum Extraction), NAICS 211130 (Natural Gas Extraction). Mappings are resolved transitively across successive updates to handle splits.
Why do credit agencies and banks still reference legacy SIC code 1311? ▾
Registries like Dun & Bradstreet, insurance underwriters, and private platforms retain SIC code 1311 because their historical financial risk data and scoring models are indexed using the legacy 4-digit SIC framework.
Does the SEC EDGAR system allow searching public filings by SIC 1311? ▾
Yes. The SEC Division of Corporation Finance assigns a primary 4-digit SIC code to public companies. You can search the EDGAR database using SIC code 1311 to group reporting peer firms.
How do OSHA safety recordkeeping rules apply to SIC code 1311? ▾
Under 29 CFR Part 1904 safety regulations, OSHA references legacy SIC codes including 1311 to determine if a physical establishment is required to maintain daily injury logs (Form 300) or is partially exempt.
What is the structural difference between SIC 1311 and NAICS codes? ▾
SIC code 1311 classifies establishments based on their final product output or market destination (what they sell), while modern NAICS codes classify them based on production processes and inputs (how they work).
What are the typical business activities classified under legacy SIC 1311? ▾
Typical business activities classified under legacy SIC 1311 are the operations associated with 'Crude Petroleum and Natural Gas'. Mapped modern NAICS codes can be referenced for specific current examples.
Is legacy SIC code 1311 uniform across all 50 U.S. states? ▾
Yes, the Standard Industrial Classification (SIC) system, including code 1311, was published as a federal standard and remains uniform nationwide. It is still referenced by various state workers' compensation boards and departments of labor.
Sources & References
- U.S. Department of Labor (OSHA): OSHA Standard Industrial Classification (SIC) Manual — Code 1311
- U.S. Census Bureau: 1987 SIC to 2022 NAICS Concordance Tables
- Federal Reserve Board: Industrial Production & Capacity Utilization Classifications
- Internal Revenue Service (IRS): Schedule C Principal Business Activity (PBA) Industry Concordance
- Office of Management and Budget (OMB): Standard Industrial Classification Systems Governance