Outcrops as windows to petroleum systems:Insights from the southern Bida Basin,Nigeria

作     者：Godwin Okumagbe Aigbadon Felix Iwebunor Chinyem Tope Shade Alege Brume Overare Obinna Chigoziem Akakuru Ikenna Arisi Obasi Ernest Orji Akudo Azuka Ocheli Jeremiah Ayok Onimisi Abdullateef Jimoh Elesius Okey Akpunonu Mu'awiya Baba Aminu Bashir Ozovehe Aminu 

作者机构：Department of GeologyFaculty of SciencesFederal University LokojaKogi StateNigeria Department of GeologyFaculty of ScienceDelta State UniversityAbrakaDelta StateNigeria Department of Earth SciencesMemorial University of NewfoundlandCanada Department of Earth SciencesFederal University of Petroleum ResourcesEffurunDelta StateNigeria Department of GeologySchool of Physical SciencesFederal University of TechnologyOwerriImo StateNigeria Department of GeologyNnamdi Azikiwe UniversityAwkaAnambra StateNigeria Department of GeologyUniversity of IlorinKwara StateNigeria 

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：284-304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：I acknowledge the Head of the Department of Geology  Federal University Lokoja  Kogi State  for the approval to use the departmental Sedimentological and Engineering Laboratories for some of the analysis. Additionally  I thank the Head of the Laboratory within the Department of Geology at Federal University Lokoja  Kogi State  Nigeria  for their invaluable assistance in conducting sedimentological and plasticity tests 

主　　题：Geochemical analysis Plasticity index Source rock Reservoir rock Stratigraphic trap Bida Basin 

摘      要：The study assessed petroleum systems in the southern Bida Basin,Nigeria,focusing on the Cretaceous *** comprise Lokoja and Patti Formation sandstones,while shales,claystone,and siltstone serve as source rocks and stratigraphic traps/*** studies delineating the key elements of the petroleum systems in the basin have not been conducted due to a lack of subsurface *** goal of the current study was to use field observations,Scanning Electron Microscopy(SEM),X-ray diffraction(XRD),and geochemical and geomechanical data to evaluate key components of petroleum systems in the southern Bida *** results presented in this investigation are intended to attain specific objectives,especially those lacking in the basin s study *** analysis revealed that the Lokoja Sandstone has porosity of 37%-39.5%and moderate permeability of 23.22-42.29 *** Patti Formation sandstone reservoirs exhibited high porosity(38%-42%)and moderate to good permeability(31.54-66.48 mD),suggesting good potential *** results revealed intragranular pores and micro-fractures in the Patti Shale,whereas the sandstone reservoirs in the Lokoja and Patti formations displayed fractures,facilitating hydrocarbon *** was the dominant mineral in the sandstone units of both *** analysis revealed that brittle and clay minerals influenced the microstructure of Patti *** analysis indicated promising petroleum potential in the Patti Shale,with a total organic carbon(TOC)content of 1.87 wt%,free hydrocarbon from kerogen(S1)of 0.41 mg/g,hydrogen index(HI)of 0.75 mg HC/g TOC,and production index(PI)of *** Patti and Lokoja formations shale,claystone,and siltstone exhibited sealing potential,with a plasticity index of 24-35 and coefficient permeability of 2.8×10^(-4)-3.6×10^(-4)cm/*** studies,XRD,geochemical data,and geomechanical index values have confirmed the key components of the petroleum system,which in turn