Geochemical Evaluation of Organic Matter of the Pabdeh and Gurpi Formations in Nosrat Oil Field, SE Persian Gulf, Using Rock-Eval VI and Gas Chromatography

In this study, rock samples from the pabdeh and Gurpi formations of well#NH-01 in the Nosrat Oil Field subjected to geochemical evaluationtechniques using Rock-Eval pyrolysis, bitumen extraction, Column Chromatography and gas chromatography. The result of geochemical study indicates Kerogen type II and III. However, most samples tend to related kerogen Type II suggesting that source rock was deposited in the anoxic to suboxic environments and most organic matter derived from marine and partly from terrestrial sources. The pabdeh Formation shows fair to good hydrocarbon potential and has already entered oil generation window, whereas the Gurpi Formation has Poor to fair hydrocarbon potential. The Gas chromatography conducted on these samples indicates that most samples are rich in saturated hydrocarbons and also suggests organic matter of the pabdeh and Gurpi formations are all indigenous.