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

Sadeghi, M; Kamali, M.R; Ghavami Riabi, R; Qorbani, B

doi:10.22071/gsj.2015.42732

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

Document Type : Original Research Paper

Authors

M Sadeghi ¹

M.R Kamali ²

R Ghavami Riabi ³

B Qorbani ⁴

¹ M.Sc., School of Mining, Petroleum and Geophysics Engineering, Shahrood University of Technology, Shahrood, Iran

² Associate Professor, Research Institute of Petroleum Industry, Tehran, Iran

³ Assistant Professor, School of Mining, Petroleum and Geophysics Engineering, Shahrood University of Technology, Shahrood, Iran

⁴ M.Sc., Research Institute of Petroleum Industry, Tehran, Iran

10.22071/gsj.2015.42732

Abstract

In this study, rock samples from the pabdeh and Gurpi formations of well#NH-01 in the Nosrat Oil Field subjected to geochemical evaluation techniques 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.

Keywords

Source Potential Index

Rock Eval Pyrolysis VI

Pabdeh And Gurpi Formations

Gas Chromatography

Nosrat Oil Field