Characteristics and favorable target optimization of hydrocarbon plays in the Gabon Coastal Basin

doi:10.3969/j.issn.1672-7703.2018.03.012

Abstract

Abstract: Based on the latest oil and gas feld information and petroleum geological data of the Gabon Coastal Basin, it is divided into 6 hydrocarbon plays of two categories (i.e., suprasalt and subsalt) with reservoirs as the core. Among them, Berriasian sandstone play and Aptian sandstone play are located below salt rocks. These subsalt plays are characterized by continental reservoir, salt rock as the overlying barrier and sealing bed and fracture belt as the migration pathway. Albian-Cenomanian sandstone play, Maastrichtian clastic play, Coniacian-Campanian turbidite play and Eocene-Oligocene channel sandstone play are located above salt rocks. And these suprasalt plays are characterized by marine reservoir, salt structure controlling reservoir and salt movement connecting source rock with reservoir. Then, oil and gas resources were evaluated with the play as the unit by means of Monte Carlo method. And according to the calculation results, the resources to be discovered in the Gabon Costal Basin in the following 30 years are 6895×10⁶bbl, including oil resources of 5893×10⁶bbl, natural gas resources of 6005×10⁹ft³ and condensate oil resources of 34×10⁶bbl. It is indicated from the analysis on the characteristics of plays in the Gabon Coastal Basin and the resource evaluation results that Aptian sandstone play is the most favorable exploration target.

Key words: Gabon Coastal Basin, play, resource evaluation, favorable exploration area

CLC Number:

He Bin, Bai Guoping, He Yonghong, Du Yanjun, Wang Dapeng, Wang Bianyang, Ma Lang, Sun Tongying. Characteristics and favorable target optimization of hydrocarbon plays in the Gabon Coastal Basin[J]. China Petroleum Exploration, 2018, 23(3): 99-108.

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