Bulk petroleum geochemistry of shales from the onshore Rio del Rey Basin,Cameroon

作     者：Christopher M.Agyingi Noel C.Tangko Emmanuel Eseme 

作者机构：Department of GeologyUniversity of BueaCameroon P.O.Box 63BueaCameroon Activation Laboratories LtdAncasterONCanada 

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

年 卷 期：2022年第3卷第2期

页      面：111-119页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

主　　题：Shale Rio del Rey Basin Total organic carbon Rock-eval Petroleum geochemistry Cameroon 

摘      要：Petroleum production in the Rio del Rey Basin,which is an extension of the Niger Delta of Nigeria into Cameroon,has been limited to the Tertiary offshore portion since the late *** to dedlining reserves in this offshore portion,the onshore Cretaceous portion of the basin attracted significant attention in the last *** the present *** from outcrops in the onshore portion of the basin were analyzed to evaluate their potential as source rocks,assess hydrocarbon generation,and highlight their signifcance for *** observations,total organic carbon(TOC)measure-ments,and Rock Eval pyrolysis were used to generate data for these ***-eval S2 values(0.42-3 mg HC/g rock)based on measured present-day TOC values(0.58-2.44 wtx)of the shales studied signify poor to fair source rock potentials,whereas calculated S2 values(1.74-8.19 mg HC/g rock)based on estimated original TOC values(0.67-2.87 wt%)produced fair to good source rocks containing Type Ⅱ/Ⅲ kerogen,which were transformed by maturity to the present-day Type Ⅲ/Ⅳ *** of the samples based on Tmax values varying between 439 and 471℃are equivalent to maturity values ranging between 0.74% R_(r) and 1.32% R_(r), and these represent the peak oil to condensate/wet gas zones of hy-drocarbon *** results demonstrate that mature source rocks are present in the onshore part of the Rio del Rey Basin,and thus,it is suitable for petroleum exploration.