摘要
Anza basin is located in the extensional arm of the central African rift system in the North-Eastern part of Kenya. Cretaceous sedimentary rocks were sampled from the four wells namely, Chalbi-3, Sirius-1, Ndovu-1 and Kaisut-1. Anza basin occurs on a fault block within a Paleocene</span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">Cretaceous rift basin. T</span><span style="font-family:Verdana;">he methodological approach used for the evaluation of source rocks i</span><span style="font-family:Verdana;">ncluded petrophysical and geochemical methods to ascertain their potential. Well sections with </span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">a </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">higher shale-volume ratio were sampled for geochemical screeni</span><span style="font-family:Verdana;">ng to determine the organic richness and thermal maturity of poten</span><span style="font-family:Verdana;">tial source rocks, respectively. Source rock with organic richness ≥ 0.5</span><span style="white-space:nowrap;font-family:Verdana;">%</span><span style="font-family:Verdana;"> were evaluated further for their petroleum potential using Rock-Eval pyrolysis to determine their thermal maturity, organo-facies and </span><i><span style="font-family:Verdana;">in-situ </span></i><span style="font-family:Verdana;">generated hydrocarbons present in sedimentary facies. The geochemical evaluation of rock samples from the drilled wells’ sections of Chalbi-3 and Sirius-1 confirmed both oil and gas potential. Gas Chromatography and Mass Spectrometry (GCMS) were used to characterize the biomarker signatures and oil-oil correlation of Sirius-1 samples. A predictive model was developed to integrate the petrophysical and geochemical da
Anza basin is located in the extensional arm of the central African rift system in the North-Eastern part of Kenya. Cretaceous sedimentary rocks were sampled from the four wells namely, Chalbi-3, Sirius-1, Ndovu-1 and Kaisut-1. Anza basin occurs on a fault block within a Paleocene</span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">Cretaceous rift basin. T</span><span style="font-family:Verdana;">he methodological approach used for the evaluation of source rocks i</span><span style="font-family:Verdana;">ncluded petrophysical and geochemical methods to ascertain their potential. Well sections with </span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">a </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">higher shale-volume ratio were sampled for geochemical screeni</span><span style="font-family:Verdana;">ng to determine the organic richness and thermal maturity of poten</span><span style="font-family:Verdana;">tial source rocks, respectively. Source rock with organic richness ≥ 0.5</span><span style="white-space:nowrap;font-family:Verdana;">%</span><span style="font-family:Verdana;"> were evaluated further for their petroleum potential using Rock-Eval pyrolysis to determine their thermal maturity, organo-facies and </span><i><span style="font-family:Verdana;">in-situ </span></i><span style="font-family:Verdana;">generated hydrocarbons present in sedimentary facies. The geochemical evaluation of rock samples from the drilled wells’ sections of Chalbi-3 and Sirius-1 confirmed both oil and gas potential. Gas Chromatography and Mass Spectrometry (GCMS) were used to characterize the biomarker signatures and oil-oil correlation of Sirius-1 samples. A predictive model was developed to integrate the petrophysical and geochemical da
作者
Bett Gilbert
Daniel Olago
Daniel Ichangi
Bernard Rop
Bett Gilbert;Daniel Olago;Daniel Ichangi;Bernard Rop(Department of Geology, University of Nairobi, Nairobi, Kenya;Department of Mining, Materials and Petroleum Engineering, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya)
