Pub Date : 2021-01-01DOI: 10.35248/2381-8719.21.10.493
Hootan Khodaparast
Shahrebabak in Kerman province, in southern central Iran, is located along Tectono-Volcanic strip of Urumieh- Dokhtar. This strip is mainly composed of volcanic and pyroclastic rocks of Tertiary and Upper Cretaceous Ophiolite Melanges have been observed along major fractures on its south western parts. Based on geophysical studies, the Northeastern part of the area is most likely to contain metal elements’ anomalies and the southern part of the region is also among promising areas. Landsat ETM remote sensing survey showed that the Northeastern part of the region show potential mineralization in band ratio techniques, classification methods and also application of PCA and as a result is more suitable for regional exploration. There is a logical connection between fractures in the area and alteration zones which imply the role of faults and magnetic lineaments in the mineralization in the area.
{"title":"Explore the Metal Elements of Shahrebabak Based on Geophysical Data and Remote Sensing","authors":"Hootan Khodaparast","doi":"10.35248/2381-8719.21.10.493","DOIUrl":"https://doi.org/10.35248/2381-8719.21.10.493","url":null,"abstract":"Shahrebabak in Kerman province, in southern central Iran, is located along Tectono-Volcanic strip of Urumieh- Dokhtar. This strip is mainly composed of volcanic and pyroclastic rocks of Tertiary and Upper Cretaceous Ophiolite Melanges have been observed along major fractures on its south western parts. Based on geophysical studies, the Northeastern part of the area is most likely to contain metal elements’ anomalies and the southern part of the region is also among promising areas. Landsat ETM remote sensing survey showed that the Northeastern part of the region show potential mineralization in band ratio techniques, classification methods and also application of PCA and as a result is more suitable for regional exploration. There is a logical connection between fractures in the area and alteration zones which imply the role of faults and magnetic lineaments in the mineralization in the area.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"104 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75085918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.35248/2381-8719.21.S3.001
G. F. Rad
The volcanic complex of North Khour is located in southern khorasan province, in 90 km of northwest of Birjand.The study volcanic igneous rocks are including Basaltic andesite, Andesite and trachyandesite, Latite, Dacite to Rhyodacite and pyroclastic rocks are including Tuff and breccia. The majority texture of these rocks is porphyry. Magmatic series of most samples are calc alkaline but some samples have inclination to tholleiitic serie. Furthermore in diagram of magmatic arc definition, the study rocks are situating in field of continental arc and seems which magmatism of area has been result of subduction of a oceanic crust under the continental crust. Because of the area is an upper part of a cu porphyry system, this paper is a very important research to know more about this system. Iron mineralization in area is as magnetite, hematite and as lower amount of goethite and with attention to the field observations, it seems this mineralization has magmatic origin. Burnite as alone Cu ore has been formed as primary and very little. The presence of bornite and pyrite as sulfide phases as very little and absence of other Cu primary sulfide ores in area together with secondary Cu mineralization phases in very high amounts, is showing a hydrothermal solution with high oxidation degree which has passed the latest magmatic differentiation and has caused to form surface Cu ores as calcosite in supergene zone. The thermobarrometry studies of fluid inclusions has specified degree of 10 weight percent of NaCl, 50 megapascal pressure and temperature range of 200-220 centigrade degrees for this mineralization.Therefore it seems that mineralization is related to upper parts of a Cu–porphyry system which is showing a lower temperature.
{"title":"Geochemistry and Microthermometry of Fluid Inclusions of Cu and Fe Mineralization in North Khour Volcanic Rocks, Northwestern Birjand","authors":"G. F. Rad","doi":"10.35248/2381-8719.21.S3.001","DOIUrl":"https://doi.org/10.35248/2381-8719.21.S3.001","url":null,"abstract":"The volcanic complex of North Khour is located in southern khorasan province, in 90 km of northwest of Birjand.The study volcanic igneous rocks are including Basaltic andesite, Andesite and trachyandesite, Latite, Dacite to Rhyodacite and pyroclastic rocks are including Tuff and breccia. The majority texture of these rocks is porphyry. Magmatic series of most samples are calc alkaline but some samples have inclination to tholleiitic serie. Furthermore in diagram of magmatic arc definition, the study rocks are situating in field of continental arc and seems which magmatism of area has been result of subduction of a oceanic crust under the continental crust. Because of the area is an upper part of a cu porphyry system, this paper is a very important research to know more about this system. Iron mineralization in area is as magnetite, hematite and as lower amount of goethite and with attention to the field observations, it seems this mineralization has magmatic origin. Burnite as alone Cu ore has been formed as primary and very little. The presence of bornite and pyrite as sulfide phases as very little and absence of other Cu primary sulfide ores in area together with secondary Cu mineralization phases in very high amounts, is showing a hydrothermal solution with high oxidation degree which has passed the latest magmatic differentiation and has caused to form surface Cu ores as calcosite in supergene zone. The thermobarrometry studies of fluid inclusions has specified degree of 10 weight percent of NaCl, 50 megapascal pressure and temperature range of 200-220 centigrade degrees for this mineralization.Therefore it seems that mineralization is related to upper parts of a Cu–porphyry system which is showing a lower temperature.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"10 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73340180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.35248/2381-8719.21.10.490
A. Othman, Farouk Metwally, M. Fathy, Wael Said
The Nile Delta occupies the northeastern part of the African continent and it is one of the world’s classic deltas. The present-day delta has passed through different events as part of the regional tectonics in the Mediterranean area which has shaped many of its physiographic features. This area is now regarded as major gas province and one of the most promising areas for future petroleum exploration. In 2010, the U.S. Geological Survey estimated means of 1.8 billion barrels of recoverable oil, 223 trillion cubic feet of recoverable gas, and 6 billion barrels of natural gas liquids in the Nile Delta Basin Province using a geology-based assessment methodology.
{"title":"Reservoir Delineation Employing Spectral Decomposition and Pre-Stack Inversion Techniques, Offshore Nile Delta, Egypt","authors":"A. Othman, Farouk Metwally, M. Fathy, Wael Said","doi":"10.35248/2381-8719.21.10.490","DOIUrl":"https://doi.org/10.35248/2381-8719.21.10.490","url":null,"abstract":"The Nile Delta occupies the northeastern part of the African continent and it is one of the world’s classic deltas. The present-day delta has passed through different events as part of the regional tectonics in the Mediterranean area which has shaped many of its physiographic features. This area is now regarded as major gas province and one of the most promising areas for future petroleum exploration. In 2010, the U.S. Geological Survey estimated means of 1.8 billion barrels of recoverable oil, 223 trillion cubic feet of recoverable gas, and 6 billion barrels of natural gas liquids in the Nile Delta Basin Province using a geology-based assessment methodology.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"10 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85190031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.35248/2381-8719.21.10.492
C. Dong
In the following, we present the first successful case in geothermal exploration history that utilizes seismoelectric survey methods. Through rigorous research, we developed a novel seismoelectric surveying system that includes the design of proprietary specialized instruments to acquire, process, and interpret the seismoelectric signal (SES) in order to measure relative permeability in geothermal reservoirs. The system is based, on the principles of subsurface seismic wave propagation, its disturbance of the electric double layer in water saturation zones and the seismoelectric signal (SES) generated by this interaction. Theoretically, our system is designed on the Helmholtz-Smoluchowski equation (defines steady state streaming potential-1859). Our method involves generating, recording, processing in interpreting the seismoelectric signals (SES). This technique has been applied in over 300 surveys worldwide in both groundwater and petroleum reservoirs. Its ability to detect fractures has delivered a water source in areas lacking conventional porous media. The system’s portability permits us carry out studies in difficult to reach areas. Results demonstrate that it is effective in locating geothermal reservoirs, groundwater as well as hydrocarbons. This seismoelectric survey system is more economical, more accurate, and more efficient and correlates better to well log data in comparison to other geophysical techniques.
{"title":"Geothermal Exploration by Seismoelectric Survey","authors":"C. Dong","doi":"10.35248/2381-8719.21.10.492","DOIUrl":"https://doi.org/10.35248/2381-8719.21.10.492","url":null,"abstract":"In the following, we present the first successful case in geothermal exploration history that utilizes seismoelectric survey methods. Through rigorous research, we developed a novel seismoelectric surveying system that includes the design of proprietary specialized instruments to acquire, process, and interpret the seismoelectric signal (SES) in order to measure relative permeability in geothermal reservoirs. The system is based, on the principles of subsurface seismic wave propagation, its disturbance of the electric double layer in water saturation zones and the seismoelectric signal (SES) generated by this interaction. Theoretically, our system is designed on the Helmholtz-Smoluchowski equation (defines steady state streaming potential-1859). Our method involves generating, recording, processing in interpreting the seismoelectric signals (SES). This technique has been applied in over 300 surveys worldwide in both groundwater and petroleum reservoirs. Its ability to detect fractures has delivered a water source in areas lacking conventional porous media. The system’s portability permits us carry out studies in difficult to reach areas. Results demonstrate that it is effective in locating geothermal reservoirs, groundwater as well as hydrocarbons. This seismoelectric survey system is more economical, more accurate, and more efficient and correlates better to well log data in comparison to other geophysical techniques.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"45 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79281689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.35248/2381-8719.21.10.494
G. Hamada
An accurate determination of porosity and water saturation is vital for evaluating an oil reserve and proposing a development plan for developed sandstone reservoir. The objective of this study is to provide an improved intelligent approach the use of functional networks to estimate porosity and water saturation from well log using real field data in sandstone reservoir where it becomes difficult to acquire reliable well logging data. The proposed methodology makes use of appropriate well logs and core measurements. A portion of the data available was retained for verification of the prediction of water saturation and porosity. This paper presents a novel method for estimating these two important parameters directly from conventional well measurements. The recently proposed Functional Networks technique is applied for rapid and accurate prediction of these parameters, using six and five basic well log measurements as data for estimating porosity and water saturation respectively. Functional network is a generalization of the conventional Feed Forward Neural Networks, which overcome many of the drawbacks of the conventional neural network techniques. The proposed functional network was trained using data gathered from two wells in the Middle East region. Results obtained from this case study of sandstone reservoir using the proposed intelligent technique have shown to be fast and accurate referring to core samples porosity and water saturation values.
{"title":"Sandstone Reservoirs Porosity and Water Saturation Estimation Using Functional Network Techniques","authors":"G. Hamada","doi":"10.35248/2381-8719.21.10.494","DOIUrl":"https://doi.org/10.35248/2381-8719.21.10.494","url":null,"abstract":"An accurate determination of porosity and water saturation is vital for evaluating an oil reserve and proposing a development plan for developed sandstone reservoir. The objective of this study is to provide an improved intelligent approach the use of functional networks to estimate porosity and water saturation from well log using real field data in sandstone reservoir where it becomes difficult to acquire reliable well logging data. The proposed methodology makes use of appropriate well logs and core measurements. A portion of the data available was retained for verification of the prediction of water saturation and porosity. This paper presents a novel method for estimating these two important parameters directly from conventional well measurements. The recently proposed Functional Networks technique is applied for rapid and accurate prediction of these parameters, using six and five basic well log measurements as data for estimating porosity and water saturation respectively. Functional network is a generalization of the conventional Feed Forward Neural Networks, which overcome many of the drawbacks of the conventional neural network techniques. The proposed functional network was trained using data gathered from two wells in the Middle East region. Results obtained from this case study of sandstone reservoir using the proposed intelligent technique have shown to be fast and accurate referring to core samples porosity and water saturation values.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"49 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83299845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2381-8719.19.9.468
Meryem El Boukhari, S. Moutaki, A. Ghafiri, Hassan Oulidi Jarar, Khalid El Ouardi
Generally, the road infrastructure suffers from significant damage caused by natural disasters (flood, earthquake, etc.). In particular, the Kingdom of Morocco experienced several interruptions of the road network during previous floods. In this sense, paper presents a new method for estimating the exposure’s degree of the road infrastructure to the risk of flooding. This method has been applied to the province of Larache. Based on the flood history, a model is developed to define areas exposed to flood hazard and deduce the exposure’s degree of each road to floods. Several results are obtained allowing a detailed mapping of flood risk in the province of Larache.
{"title":"Estimation of Road’s Exposure to Floods in the Province of Larache, Morocco","authors":"Meryem El Boukhari, S. Moutaki, A. Ghafiri, Hassan Oulidi Jarar, Khalid El Ouardi","doi":"10.35248/2381-8719.19.9.468","DOIUrl":"https://doi.org/10.35248/2381-8719.19.9.468","url":null,"abstract":"Generally, the road infrastructure suffers from significant damage caused by natural disasters (flood, earthquake, etc.). In particular, the Kingdom of Morocco experienced several interruptions of the road network during previous floods. In this sense, paper presents a new method for estimating the exposure’s degree of the road infrastructure to the risk of flooding. This method has been applied to the province of Larache. Based on the flood history, a model is developed to define areas exposed to flood hazard and deduce the exposure’s degree of each road to floods. Several results are obtained allowing a detailed mapping of flood risk in the province of Larache.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"3 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89665522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2381-8719.19.8.464
E. Daniel, R. Jimoh, K. Lawal
The study of the geometry and kinematics of deep geological structures, bearing mineralization has advanced greatly by the aggressive progress of geophysical techniques over the last decades. The mineralization zones located in the Shanono local government area of Kano state Nigeria has its genesis controlled by shear zones. This research was aimed at delineating and characterizing subsurface geologic structures around the study area. Both qualitative and quantitative analysis of aeromagnetic data has provided defined distinct pattern of the magnetic signatures. Euler solution of the aeromagnetic data with structural index one, revealed the presence of the major tectonic trends of anomalies in the NE-SW and NW-SE directions. The trends of few of these structures are observed to be similar to fracture orientations in the Nigerian basement complex. These structures control the emplacement of the gold mineralization as these provides the pathways to flow of mineral rich fluid within the host rocks of the study area.
{"title":"Delineation of Gold Mineral Potential Zone Using High Resolution Aeromagnetic Data Over Part of Kano State, Nigeria","authors":"E. Daniel, R. Jimoh, K. Lawal","doi":"10.35248/2381-8719.19.8.464","DOIUrl":"https://doi.org/10.35248/2381-8719.19.8.464","url":null,"abstract":"The study of the geometry and kinematics of deep geological structures, bearing mineralization has advanced greatly by the aggressive progress of geophysical techniques over the last decades. The mineralization zones located in the Shanono local government area of Kano state Nigeria has its genesis controlled by shear zones. This research was aimed at delineating and characterizing subsurface geologic structures around the study area. Both qualitative and quantitative analysis of aeromagnetic data has provided defined distinct pattern of the magnetic signatures. Euler solution of the aeromagnetic data with structural index one, revealed the presence of the major tectonic trends of anomalies in the NE-SW and NW-SE directions. The trends of few of these structures are observed to be similar to fracture orientations in the Nigerian basement complex. These structures control the emplacement of the gold mineralization as these provides the pathways to flow of mineral rich fluid within the host rocks of the study area.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"12 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80795746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.35248/2381-8719.19.9.473
A. Chinwuko, Danbatta, Ovwasa, Shaibu, Shuaibu
Petrographic and geochemical analysis of basement rocks in Federal University Gusau and its environs, Zamfara State, Northwestern Nigeria were carried out in order to unveil the major rock forming minerals as well as the textural relationships composition within the rock. The identified rock unit is granite and they are mainly whitishgrey in colour, with the majority of them having porphyritic-coarse-grained texture and minor with fine-grained texture. The light coloured crystals in hand specimens are the felsic minerals mainly quartz, and feldspars while the grey-dark crystals are the mafic minerals like the biotite-mica. The result of the thin section analysis depicts that the minerals present within the rock samples in the area: quartz (40%), orthoclase (40%) and biotite (20%). These identified minerals are classified as the major rock forming silicate minerals. The geochemical analysis result shows that the rocks are characterized by high percentage of quartz (SiO2) in the range of 77.4-98.2 wt% with an average of 84.87 wt%; subordinate amounts of hematite (Fe2O3) with an average concentration of 4.08 wt% as well as low concentration of K2O, CaO, TiO2, V2O5, MnO, NiO, CuO, ZnO, RuO2, In2O3 and other minor constituent oxides. The variation diagram of SiO2 and other oxides within the study area reveals a very strong negative correlation of SiO2 against CaO, TiO2, V2O5, MnO, Fe2O3, CUO, PbO, and Eu2O3 respectively, with the average correlation value of -0.91. The geochemical analysis results also reveal minor alteration of modal composition amongst the samples analysed which suggest the similarities in composition of all the samples within the study area.
{"title":"Petrographic Study and Geochemical Analysis of Basement Rocks in Federal University Gusau and Its Environs, Zamfara State, Northwestern Nigeria","authors":"A. Chinwuko, Danbatta, Ovwasa, Shaibu, Shuaibu","doi":"10.35248/2381-8719.19.9.473","DOIUrl":"https://doi.org/10.35248/2381-8719.19.9.473","url":null,"abstract":"Petrographic and geochemical analysis of basement rocks in Federal University Gusau and its environs, Zamfara State, Northwestern Nigeria were carried out in order to unveil the major rock forming minerals as well as the textural relationships composition within the rock. The identified rock unit is granite and they are mainly whitishgrey in colour, with the majority of them having porphyritic-coarse-grained texture and minor with fine-grained texture. The light coloured crystals in hand specimens are the felsic minerals mainly quartz, and feldspars while the grey-dark crystals are the mafic minerals like the biotite-mica. The result of the thin section analysis depicts that the minerals present within the rock samples in the area: quartz (40%), orthoclase (40%) and biotite (20%). These identified minerals are classified as the major rock forming silicate minerals. The geochemical analysis result shows that the rocks are characterized by high percentage of quartz (SiO2) in the range of 77.4-98.2 wt% with an average of 84.87 wt%; subordinate amounts of hematite (Fe2O3) with an average concentration of 4.08 wt% as well as low concentration of K2O, CaO, TiO2, V2O5, MnO, NiO, CuO, ZnO, RuO2, In2O3 and other minor constituent oxides. The variation diagram of SiO2 and other oxides within the study area reveals a very strong negative correlation of SiO2 against CaO, TiO2, V2O5, MnO, Fe2O3, CUO, PbO, and Eu2O3 respectively, with the average correlation value of -0.91. The geochemical analysis results also reveal minor alteration of modal composition amongst the samples analysed which suggest the similarities in composition of all the samples within the study area.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"265 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72455452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The delineation of groundwater potential zones in Ondo State was carried out using Remote Sensing, Geographic Information Systems (GIS) and Hydrogeophysics. In this study, various thematic maps such as: soil map, slope, drainage map, land use/Land cover map, geological map, rainfall map, lineaments map were obtained from enhanced satellite imagery. These maps were overlaid in terms of weighed overlay method using Spatial Analysis tool in Arc GIS 10.5. During weighed overlay analysis, different ranks were given to each individual parameter of each thematic map and weights were assigned according to their influence. Results showed that spatial distribution of the most promising sites for groundwater exploration was dependent on the interrelated factors of lithology, topography and geologic structure. The groundwater potential map obtained from the study area showed that 17.5% of the total study area lie within the “very high” potential zone, 12.0% of the area falls within the “high”, 39.5% lies within the “moderate” zone, 25.7% lies within the “low “potential zone while 5.3% lies within the very low potential zone. The very high potential areas lie within the sedimentary zone in the southern part of the study area with high alluvial deposits, while the “very low” prospect zone lies majorly within the basement complex zone in the northern part of the study area. The query results on Ijapo Vertical electric sounding (VES) data analysis shows the presence of four lithology: top soil, sand (which contains the fresh water), sand clay (which contains the brackish water) and the clay (which contains the saline water). The boreholes susceptible to salt water intrusion were identified and the best drilling point with respect to depth were also determined.
{"title":"Groundwater Potential Zone Mapping of Ondo State Using Multi-criteria Technique and Hydrogeophysics","authors":"Epuh Ee, Joshua Eo, Elesho Ao, Orji Mj, Damilola Om, Adetoro Pt","doi":"10.35248/2381-8719.19.9.471","DOIUrl":"https://doi.org/10.35248/2381-8719.19.9.471","url":null,"abstract":"The delineation of groundwater potential zones in Ondo State was carried out using Remote Sensing, Geographic Information Systems (GIS) and Hydrogeophysics. In this study, various thematic maps such as: soil map, slope, drainage map, land use/Land cover map, geological map, rainfall map, lineaments map were obtained from enhanced satellite imagery. These maps were overlaid in terms of weighed overlay method using Spatial Analysis tool in Arc GIS 10.5. During weighed overlay analysis, different ranks were given to each individual parameter of each thematic map and weights were assigned according to their influence. Results showed that spatial distribution of the most promising sites for groundwater exploration was dependent on the interrelated factors of lithology, topography and geologic structure. The groundwater potential map obtained from the study area showed that 17.5% of the total study area lie within the “very high” potential zone, 12.0% of the area falls within the “high”, 39.5% lies within the “moderate” zone, 25.7% lies within the “low “potential zone while 5.3% lies within the very low potential zone. The very high potential areas lie within the sedimentary zone in the southern part of the study area with high alluvial deposits, while the “very low” prospect zone lies majorly within the basement complex zone in the northern part of the study area. The query results on Ijapo Vertical electric sounding (VES) data analysis shows the presence of four lithology: top soil, sand (which contains the fresh water), sand clay (which contains the brackish water) and the clay (which contains the saline water). The boreholes susceptible to salt water intrusion were identified and the best drilling point with respect to depth were also determined.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"16 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87605176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the oil industry, the inflow of water into the gas and oil wells represents always an important issue that needs to deal with. In this study a water-repellent composition, which is based on volatile hydrocarbon solvent, was proposed for handling of water isolating work in gas wells. As a volatile hydrocarbon solvent, it was quite promising to use gas condensate and its primary processing products (like stable gas condensate SC and light distillate of gas condensate DGCL). Initially, we studied the effect of compositions based on the ABR water repellent, M100 fuel oil and solvents SC, DGCL and mixed in equal volumes of DGCL + SC on gas permeability of gas-saturated porous medium. The article presents the results of studies, conducted on physical models of the formation, confirming the efficiency and selectivity of the water-repellent composition impact on the water-cut interval.
{"title":"PROSPECTS FOR IMPROVING THE EFFICIENCY OF WATER INSULATION WORKS IN GAS WELLS","authors":"S. Al-Obaidi, Khalaf Fh","doi":"10.31224/osf.io/6fjrm","DOIUrl":"https://doi.org/10.31224/osf.io/6fjrm","url":null,"abstract":"In the oil industry, the inflow of water into the gas and oil wells represents always an important issue that needs to deal with. In this study a water-repellent composition, which is based on volatile hydrocarbon solvent, was proposed for handling of water isolating work in gas wells. As a volatile hydrocarbon solvent, it was quite promising to use gas condensate and its primary processing products (like stable gas condensate SC and light distillate of gas condensate DGCL). Initially, we studied the effect of compositions based on the ABR water repellent, M100 fuel oil and solvents SC, DGCL and mixed in equal volumes of DGCL + SC on gas permeability of gas-saturated porous medium. The article presents the results of studies, conducted on physical models of the formation, confirming the efficiency and selectivity of the water-repellent composition impact on the water-cut interval.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"54 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90719359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：