The Heriot Watt University link that offers a Master of Science in Petroleum Engineering via distance learning.
Society of Petroleum Engineers. A must sign up for any want to be or current petroleum engineer. Great for networking opportunities and staying up to date.
The Schlumberger oilfield glossary. This is hands down the most comprehensive glossary with all key petroleum engineering terms.
Great website for staying up to date on current news and events. Also recruitment opportunities around the world.
Wikipedia’s information on petroleum engineering.