Petroleum Exploration Association of New Zealand
- Promoting the interests of petroleum producers and explorers in New Zealand. includes membership, news, and papers and reports.
- http://www.pepanz.org/

Bienvenidos al Instituto Petroquímico Argentino
- Non-profit institution whose objectives include studies and analysis, technological research and training, and promotional services for the petrochemical and chemical industries.
- http://www.ipqa.org.ar/

PGK - Petroleum Geological Circle
- Dutch professional society of petroleum geologists and engineers. In English.
- http://www.pgknet.nl/

Canadian Society of Petroleum Geologists
- Site includes member information, convention information, news, and publications. Publishes books, a magazine and a technical journal. Has 3500 members.
- http://www.cspg.org/

Society of Petroleum Engineers
- Serves professional engineers, scientists, and managers in the exploration and production segments of the worldwide oil and gas industry.
- http://www.spe.org/

SCAWeb: The Society of Core Analysts
- Promotes the technology of core analysis. Has 600 members. It is a chapter at large of the Society of Professional Well Log Analysts. Based in Dallas, Texas.
- http://www.scaweb.org/

Society of Professional Well Log Analysts
- Includes member services, well log mnemonics, software directory. Has 2000 members.
- http://www.spwla.org/

American Association of Petroleum Geologists
- International organization with 31,000 members in 115 countries. Site includes member information, trade show schedules, news, and publications.
- http://www.aapg.org/