This section contains a collection of standards information used by the American Petroleum Institute ( API ). Further information on the standards may be found in the API publications "Recommended Standard Format for Recording Digital Well Log Data on Magnetic Tape" ( API Bulletin D9 ) and "The API Well Number and Standard State and County Numeric Codes Including Offshore Waters" ( API Bulletin D12A ). These standards include;

• Canadian Province, Districts, and Offshore Area Codes
• Curve Class Codes
• Curve Modifier Codes
• Curve Type Codes
• Service contractor, Logging, and Digitizing Company Codes
• Log Type Codes
• Mexico State Codes
• Mud ( Drilling Fluids ) Codes
• Country Codes
• US County Codes (no offshore)
• US County Codes (Excel spreadsheet format - incl. offshore)
• US State Codes
  
• API Numbering Guidelines (technical explanation & examples)

Note: this information has been gathered from other sites and is provided here as a permanent resource to our members. However, no effort is made to keep this information up-to-date.