Check of the hydrocarbon potential of Ilam, Lafan and Sarvak formations in The Nusrat Oil Field in SE Persian Gulf: Using Rock Eval Pyrolysis VI and gas chromatography (GC)
Subject Areas :Keywords: Hydrocarbon potential Rock Eval Pyrolysis Ilam Lafan and Sarvak formations gas chromatography, Nosrat Oil Field.,
Abstract :
The best tools and methods in geochemical evaluation of source rocks are Rock-Eval Pyrolysis and Gas Chromatography. In this study, in order to evaluate geochemical characteristics of Ilam, Laffan and Sarvak formations in well NH01 in Nosrat Oil Field, geochemical data including preliminary and detailed Rock Eval Pyrolysis, bitumen extraction and Gas Chromatography on 15 cuttings samples (7 samples from Ilam, 6 samples from Laffan and 2 samples from Sarvak formations) were used. Results of pyrolysis indicated that most samples have a mixture of kerogen type II and III that often tend to be kerogen type II. In general, Ilam, Laffan and Sarvak formations are poor in organic matter and have lower hydrocarbon potential and maturities. Results of liquid chromatography for Ilam and Sarvak samples indicated that these samples are paraffinic in origin. Gas chromatography suggested that Ilam and Sarvak formations deposited in anoxic conditions containing organic matter mostly derived from marine environment with subordinate amounts of terrestrial input.