This book is an introduction to various aspects of exploration and production of oil and gas.It is extensively illustrated. The following subjects are * petroleum geology and geophysics * formation evaluation (coring, logging, wireline testing and production testing) * drilling of exploration and production wells * production of oil and gas (drive mechanisms, production wells and processing) * production installations (platforms and pipelines)Jan-Henrik Johnsen holds a Master's Degree in Petroleum Technology from NTH. He has been with Hydro for 25 years and is well experienced in formation evaluation (testing and petrophysics), reservoir and production technology. He has published several titles in petroleum related subjects.