Papers by JOSEPHINE MAXIMUS
HydroResearch 8(2005) 178-193 , 2024
This study assesses watershed vulnerability to erosion and sedimentation in Guyana using Digital ... more This study assesses watershed vulnerability to erosion and sedimentation in Guyana using Digital Elevation Model (DEM) and Land Use/Land Cover (LULC) classification. It aims to assess erosion risk by examining rainfall erosivity, soil types, and spatial variability. The integration of DEM-derived slope data with LULC and rainfall ero- sivity shows a strong correlation between high rainfall (20,809.02–31,262.35 mm) and erosivity (21,433.29– 32,200.22 MJ mm ha−1 h−1 yr−1), indicating increased erosion potential, particularly in southwestern regions. Soil analysis reveals Plinthic Acrisols, with high clay content, are more prone to erosion, whereas Orthic Ferralsols are less vulnerable. Slope analysis suggests flat terrain (89.16 %) has low erosion risk, but steeper slopes require interventions. Conservation strategies like reforestation, sustainable agriculture, contour plowing, and terracing are recommended to reduce erosion impacts. This integrated assessment provides insights for prioritizing soil conservation and adaptive management to address erosion risks in Guyana.
Advances in Image and Video Processing, 2023
The Babouri-Figuil Basin is located in Northern Cameroon. Detailed studies on the organic petrolo... more The Babouri-Figuil Basin is located in Northern Cameroon. Detailed studies on the organic petrology of the basin are still limited. This study analyzed a black shale sample (MF7-having Ro of 0.36% and a TOC of 22.8%) from the basin using organic petrography to characterize the organic matter in the rock and understand its potential for hydrocarbon generation. The study found the sample to have an abundance of lipinite maceral, suggesting a Type I kerogen source rock with excellent oil-generating potential. The vitrinite reflectance of 0.36%Ro indicates that the sample is thermally immature for hydrocarbon generation. The study suggests that the sample is from a lacustrine depositional environment with relatively good access to nearby terrigenous material.
Services for Science and Education, 2023
The Babouri-Figuil Basin is located in Northern Cameroon. Detailed studies on the organic petrolo... more The Babouri-Figuil Basin is located in Northern Cameroon. Detailed studies on the organic petrology of the basin are still limited. This study analyzed a black shale sample (MF7-having Ro of 0.36% and a TOC of 22.8%) from the basin using organic petrography to characterize the organic matter in the rock and understand its potential for hydrocarbon generation. The study found the sample to have an abundance of lipinite maceral, suggesting a Type I kerogen source rock with excellent oil-generating potential. The vitrinite reflectance of 0.36%Ro indicates that the sample is thermally immature for hydrocarbon generation. The study suggests that the sample is from a lacustrine depositional environment with relatively good access to nearby terrigenous material.
Journal of Geosciences and Geomatics, 2024
The containment of greenhouse gases, mainly CO2, is considered a significant solution to abating ... more The containment of greenhouse gases, mainly CO2, is considered a significant solution to abating the impact of climate change. Possible leakages of stored CO2 in the subsurface will pose significant threats to humans and indirectly pollute aquatic ecosystems. Seal integrity and fault connectivity analyses are necessary for assessing
storage sites, especially where depleted hydrocarbon reservoirs are the target. Many studies on top seal efficiency, lateral flow boundaries and fault reactivation have been carried out during exploration and production of oil fields. This makes these fields good candidates where such existing data and knowledge can be harnessed and applied to the case of CO2 storage. This work uses data from two wells, including extracted Vshale/Vclay logs, SGR compilation, vertical and lateral structural limits, to assess the potential for vertical and lateral leakages for CO2 subsurface storage. It was shown that shale content, lithology and compaction, often indicated in the well logs and stress tests, can be used to estimate top and lateral limiting stress. By identifying the important parameter in the estimation of capillary entry pressure (Pe), it was demonstrated that the evaluation process may be repeated without direct measurement of parameters such as pore throat(R), contact angle (θ) and interfacial tension(γ). The results have shown that understanding the mechanisms involved in fault communication and compartmentalization is vital for developing more effective strategies in choosing depleted reservoirs selectively, and for safely and reliably
storing CO2 in the subsurface. Hopefully, these findings will improve the potential for CO2 storage and highlight the important parameters to be considered for improving the overall efficiency of subsurface carbon storage systems
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Papers by JOSEPHINE MAXIMUS
storage sites, especially where depleted hydrocarbon reservoirs are the target. Many studies on top seal efficiency, lateral flow boundaries and fault reactivation have been carried out during exploration and production of oil fields. This makes these fields good candidates where such existing data and knowledge can be harnessed and applied to the case of CO2 storage. This work uses data from two wells, including extracted Vshale/Vclay logs, SGR compilation, vertical and lateral structural limits, to assess the potential for vertical and lateral leakages for CO2 subsurface storage. It was shown that shale content, lithology and compaction, often indicated in the well logs and stress tests, can be used to estimate top and lateral limiting stress. By identifying the important parameter in the estimation of capillary entry pressure (Pe), it was demonstrated that the evaluation process may be repeated without direct measurement of parameters such as pore throat(R), contact angle (θ) and interfacial tension(γ). The results have shown that understanding the mechanisms involved in fault communication and compartmentalization is vital for developing more effective strategies in choosing depleted reservoirs selectively, and for safely and reliably
storing CO2 in the subsurface. Hopefully, these findings will improve the potential for CO2 storage and highlight the important parameters to be considered for improving the overall efficiency of subsurface carbon storage systems
storage sites, especially where depleted hydrocarbon reservoirs are the target. Many studies on top seal efficiency, lateral flow boundaries and fault reactivation have been carried out during exploration and production of oil fields. This makes these fields good candidates where such existing data and knowledge can be harnessed and applied to the case of CO2 storage. This work uses data from two wells, including extracted Vshale/Vclay logs, SGR compilation, vertical and lateral structural limits, to assess the potential for vertical and lateral leakages for CO2 subsurface storage. It was shown that shale content, lithology and compaction, often indicated in the well logs and stress tests, can be used to estimate top and lateral limiting stress. By identifying the important parameter in the estimation of capillary entry pressure (Pe), it was demonstrated that the evaluation process may be repeated without direct measurement of parameters such as pore throat(R), contact angle (θ) and interfacial tension(γ). The results have shown that understanding the mechanisms involved in fault communication and compartmentalization is vital for developing more effective strategies in choosing depleted reservoirs selectively, and for safely and reliably
storing CO2 in the subsurface. Hopefully, these findings will improve the potential for CO2 storage and highlight the important parameters to be considered for improving the overall efficiency of subsurface carbon storage systems