Crude oil characterization and hydrocarbon affinity of Amarah Oil Field, South Iraq

Five oil sample of Mashrif and Nahr Umr Formation for Amarah oil field, southern Iraq, were taken and analyzed in Geo Mark laboratory in USA center in order to determine the bulk properties of crude oils and carbon isotopes for these samples in addition to determine biomarker parameters using Gas Chromatography(GC), and Gas Chromatography Mass Spectrometry )GCMS (analytical technique. According to these biomarker analyses of the two formation, it is indicated that they are non-degraded, marine, non-waxy, derived from carbonate source and deposition in anoxic marine environment. This study also showed that the bulk properties (terpanes and steranes) of Amarah oil field are one family, and the source rocks contain marine kerogen type II. All oil samples of Amarah oil field are from source rock refer to Middle Jurassic age of sargelu Formation.