Hydrocarbon generation potential of Campano-Maastrichtian to Paleogene shales in the Benin Flank of the Anambra Basin,SW Nigeria

作     者：Omabehere Innocent Ejeh Israel Aruoriwo Abiodun Etobro Konstantinos Perleros Jude Etunimonuwa Ogala Ajayi Olugbenga Ehinola Kimon Christanis Stavros Kalaitzidis 

作者机构：Department of GeologyDelta State UniversityAbrakaNigeria Geo-Energy Resources TeamLaboratory of Economic GeologyDepartment of GeologyUniversity of PatrasRio-PatrasGreece Department of GeologyUniversity of IbadanIbadanNigeria 

出 版 物：《Energy Geoscience》 (能源地球科学（英文）)

年 卷 期：2024年第5卷第3期

页      面：103-116页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：Nigerian Geological Survey Agency, (81348) University of Patras 

主　　题：Maceral Mamu Formation Thermal maturity Solid bitumen Source rock Vitrinite reflectance 

摘      要：The hydrocarbon generation potential of the Campano-Maastrichtian to Paleogene shales from the Benin Flank(located in SW Nigeria)of the Anambra Basin,has been previously investigated mostly by studying outcrops and by relatively few subsurface data-based ***,it is expedient undertaking an assessment of the hydrocarbon generation potential of this frontier area from subsurface ***-Maastrichtian to Paleogene shale samples obtained from Egoli-1 borehole in the Benin Flank of the Anambra Basin are studied by means of HAWK programmed pyrolysis,organic petrography,and mineralogy(XRD),with the aim to explore the petroleum-generating potential and the thermal *** obtained results display a significant variation of the TOC content ranging from very low(5%),indicating poor to excellent oil potential based on S_(2)values under the condition,of course,the studied formations reached the oil *** shales of the Nsukka and Imo Formations display lower petroleum-generating potential than these of the Mamu *** the studied samples are dominated by gas-prone(type III)and inert(type IV)kerogens,with few displaying mixed II/III(oil-and gas-prone).The organic-petrography observations support partly the results of the HAWK programmed pyrolysis,as they reveal an organic-richer Mamu Formation in comparison to the Nsukka and Imo Formations;huminite/vitrinite particles(both indigenous and recycled)along with variable contents of liptinite(mostly alginite and bituminite)and inertinite macerals(mostly inertodetrinite)are hosted in the *** latter display a typical composition for fine-grained clastic sediments;mostly kaolinite,illite/montmorillonite,quartz,and subordinately,*** terms of thermal maturity,huminite/vitrinite reflectance data points to immature stage;however,the occurrence of solid bitumens,displaying equivalent vitrinite reflectance values within the oil window,points to an active petroleum system in s