SAGE Record 098, Shaltami et al.
Shaltami, O. R., F. F. Fares, R. B. Elojaly, A. E. Algomati, O. A. Geniber, F. M. El Oshebi, M. Abioui, A. A. Rhouma, and B. El Abedi, 2022, Mallegh Formation in wells A1–152 and B1–120, source rock evaluation for hydrocarbon generation within the Cyrenaica Basin, northeastern Libya: SAGE Record 098, 11 p., <http://sagetech.org/sage_record_098_shaltami_et_al/>. Oral presentation at SAGE/ESSL BIGEC 2022, 30 Aug.–01 Sept. 2022, Benghazi, Libya, and Online.
Mallegh Formation in Wells A1–152 and B1–120, Source Rock Evaluation for Hydrocarbon Generation within the Cyrenaica Basin, Northeastern Libya
Osama R. Shaltami, Fares F. Fares (Department of Earth Sciences, Benghazi University, Benghazi, Libya), Rajab B. Elojaly (Arabian Gulf Oil Company [AGOCO], Benghazi, Libya), Abobakar E. Algomati* (Department of Engineering Geology, University of Bright Star, Brega, Libya), Omar A. Geniber (Department of Petroleum Engineering, University of Bright Star, Brega, Libya), Farag M. El Oshebi (Department of Earth Sciences, Benghazi University, Benghazi, Libya), Mohamed Abioui (Department of Earth Sciences, Ibn Zohr University, Agadir, Morocco), Abla. A. Rhouma (Halliburton, Sugar Land, Texas), and Basem El Abedi (Ministry of Transportation, Benghazi, Libya) (asterisk indicates speaker)
The aim of this work is to define the quality and type of organic matter, thermal maturity and depositional environment of Sirual Formation in wells A1–150 and B1–120, Cyrenaica Basin, northeastern Libya. Twenty-five of the cutting samples were subjected to Rock-Eval Pyrolysis and Leco analyses. In general, the Sirual Formation in well B1–120 is thermally immature. The total organic carbon (TOC) content ranges from 0.3 to 0.5%, suggesting poor to fair quality source rock. The Sirual Formation in well A1–152 is thermally mature to post mature. The TOC content ranges from 0.1 to 4.9% is mainly fair to excellent quality source rock. The hydrogen index (HI) indicates that the Sirual Formation in the studied wells is primarily a type III/IV kerogen (gas prone / dry gas prone).
The aim of this work is to define the quality and type of organic matter, thermal maturity, and depositional environment of Mallegh Formation in wells A1–152 and B1–120, Cyrenaica Basin, northeastern Libya. Twenty-seven of the cutting samples were subjected to Rock-Eval Pyrolysis and Leco analyses. In general, The Mallegh Formation in well A1–152 is thermally mature to overmature and has non-potential source rock. The total organic carbon (TOC) content ranges from 0.1 to 4.9%, indicating poor to excellent quality source rock. The Mallegh Formation in well B1–120 is thermally immature and has non-potential source rock. The TOC content ranges from 0.3 to 0.5%, suggesting poor to fair quality source rock. The hydrogen index (HI) indicates that the Mallegh Formation in well B1–120 is primarily type III and IV kerogen, whereas the Mallegh Formation in well A1–152 is characterized by a mixture of kerogen types II/III, III, and IV. The plot of HI vs. vitrinite reflectance (%Ro) reveals that the source rock in the studied wells was deposited in marine to non-marine environments.
