This book demonstrates different stages of hydrocarbon deposit localization in a tectonically complex region—the South Caspian Mega-Basin (SCMB). Each of the stages: tectonics, sedimentation, lithology, structural analysis, and geophysical method application is described in detail and accompanied by numerous color (major) and black-white (minor) illustrations. The main benefit of this book is that the Azerbaijan hydrocarbon province has been investigated for more than 150 years, resulting in a very comprehensive archive of geological information. This book is intended not only for students of various degrees, but also for professional geologists studying principles of hydrocarbon accumulations under difficult geological environments.