• American Association of Petroleum Geologists (AAPG)
• Society of Petroleum Engineers (SPE)
• Society of Professional Well Log Analysts (SPWLA)
• Society of Exploration Geophysicists (SEG)
• Society for Sedimentary Geology (SEPM)
• Rocky Mountain Association of Geologists (RMAG)
• Denver Well Logging Society (DWLS)
• Gas Technology Institute (GTI)

Oil & Gas Companies

• Schlumberger
• Halliburton
• Baker Atlas
• Weatherford
• Core Lab
• Omni Laboratories
• iReservoir
• New England Research, Inc

General Oil & Gas Resources

• Oil & Gas Prices
• PetroMin (Petroleum E&P magazine for the Asia-Pacific region)
• Get Web Access to Denver Climate Study Group

• Digital Formation, Inc. (log analysis software)
• Golden Software
• TRC Consultants, L.C. (creators of PHD for Windows, decline curve software)
• Geo PLUS Corporation (creators of the PETRA geologic software package)

Geological & Petrophysical Government Organizations

• US Geological Survey (USGS)
• USGS Core Research Center (CRC)
• Colorado Geological Survey (CGS)
• Colorado Oil & Gas Conservation Commission (COGCC)
• Wyoming Oil & Gas Conservation Commission (WOGCC)
• Bureau of Economic Geology (BEG)
• Bureau of Economic Geology Core Research Centers

General Petroleum Geology

• AAPG (public outreach website with info and links about the petroleum industry)

Local Geological Links

• Denver Museum of Nature and Science
• Friends of Dinosaur Ridge