Play evaluation on lithologic reservoirs in hydrocarbon-rich sags in Sudan: a case study on Fula sag, Muglad Basin

doi:10.3969/j.issn.1672-7703.2017.02.011

Abstract

Abstract: The Fula sag in the Muglad Basin is a hydrocarbon-rich sag in a passive continental rift basin. Currently, its exploration focuses on lithologic traps. According to the "sag-wide oil-bearing theory" and the "tectonic-sequence zone accumulation theory", the matching relationship among structures, sedimentations, effective source rocks and migration conditions in third-order sequences of Fula sag was analyzed comprehensively by means of "four-map overlying" play evaluation method for lithologic reservoirs. Then, combined with existing oil and gas discoveries, the favorable plays of lithologic reservoirs in the Fula sag were predicted. It is indicated that AG2 Member of Abu Gabra Formation is the most favorable interval for the development of lithologic reservoirs, and the fan delta front within the Jake area is currently the most favorable lithologic reservoir exploration zone, followed by the meandering delta front within the Baleela area and then the meandering delta front within the Moga area. The lithologic reservoirs at the upper wall of fracturing slope break belt in the Fula area are limited in exploration potentials.

Key words: lithologic trap, Abu Gabra Formation, play evaluation, sedimentary sequence, Sudan, Muglad Basin, Fula sag

CLC Number:

TE112.3

Liu Shuwen, Li Zhi, Pan Xiaohua, Ke Weili, Hu Shengfu, Zhang Xinshun. Play evaluation on lithologic reservoirs in hydrocarbon-rich sags in Sudan: a case study on Fula sag, Muglad Basin[J]. China Petroleum Exploration, 2017, 22(2): 90-98.

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