Subsurface temperature Research Papers - Academia.edu (original) (raw)
Due to the new modern life style in the Egyptian villages, a huge amount of water is used in domestic purposes. Because most of the villages are unsewered, the used water is artificially recharged to the subsurface causing water logging... more
Due to the new modern life style in the Egyptian villages, a huge amount of water is used in domestic purposes. Because most of the villages are unsewered, the used water is artificially recharged to the subsurface causing water logging and groundwater pollution. Integration between water level, sedimentological setting, stable isotopes, subsurface temperature and hydrochemistry were used to investigate and evaluate the problem. Water level indicates that, water logging has been occurred due to the low hydraulic load of the surface clayey layer compared to the recharged amount of water. It is also estimated using the other criteria that, the sewage water polluted groundwater in the shallow and the intermediate zones. The pollution in the intermediate zone occurred where the second silty clay layer is missed. Draining the soil and constructing the sewage pipe net are the solutions to stop water logging and groundwater pollution.
Temperature modeling around the Vejrum salt structure in Denmark shows that the heat flow near the top is twice the regional heat flow. The temperature in the vicinity of the top of the diapir is thus anomalously high. Overlying permeable... more
Temperature modeling around the Vejrum salt structure in Denmark shows that the heat flow near the top is twice the regional heat flow. The temperature in the vicinity of the top of the diapir is thus anomalously high. Overlying permeable formations could therefore be attractive for geothermal energy exploitation. A negative temperature anomaly of −20°C is calculated around the root of the salt body. Comparisons between calculated and measured temperatures are used to test the model. It is shown that measurements of heat flow (or temperature gradients) in wells penetrating the region of groundwater circulation could be used in identification of salt diapirs.
The subsurface temperature has many impacts on geological phenomena such as hydrocarbon generation , geothermal energy, mineralization, and geological hazards. The Northeast Java Basin has various interesting phenomena, such as many oil... more
The subsurface temperature has many impacts on geological phenomena such as hydrocarbon generation , geothermal energy, mineralization, and geological hazards. The Northeast Java Basin has various interesting phenomena, such as many oil fields, active faults, mud eruptions, and some active and dormant volcanoes. We measured temperature data from tens of wells along a 130 km survey line with an average spacing of 5 km. We also measured the thermal conductivity of rocks of various lithologies along the survey line to provide geother-mal heat flow data. We propose integrated modeling for profiling the subsurface temperature beneath the survey line from Mt. Lawu to Mt. Muriah in the Northeast Java Basin. The modeling of subsurface temperature integrates various input data such as a thermal conductivity model, surface temperature, gradient temperature, a geological model, and geothermal heat flow. The thermal conductivity model considers the subsurface geological model. The temperature modeling uses the finite difference of Fourier's law, with an input subsurface thermal conductivity model, geothermal heat flow, and surface temperature. The subsurface temperature profile along with survey line shows some interesting anomalies which correlate with either subsurface volcanic activity or the impact of fault activity .
Due to the new modern life style in the Egyptian villages, a huge amount of water is used in domestic purposes. Because most of the villages are unsewered, the used water is artificially recharged to the subsurface causing water logging... more
Due to the new modern life style in the Egyptian villages, a huge amount of water is used in domestic purposes. Because most of the villages are unsewered, the used water is artificially recharged to the subsurface causing water logging and groundwater pollution. Integration between water level, sedimentological setting, stable isotopes, subsurface temperature and hydrochemistry were used to investigate and evaluate the problem. Water level indicates that, water logging has been occurred due to the low hydraulic load of the surface clayey layer compared to the recharged amount of water. It is also estimated using the other criteria that, the sewage water polluted groundwater in the shallow and the intermediate zones. The pollution in the intermediate zone occurred where the second silty clay layer is missed. Draining the soil and constructing the sewage pipe net are the solutions to stop water logging and groundwater pollution.
Abstract The temperature field around salt diapirs has been calculated with a finite-element method, whose accuracy is estimated by comparing simulation results with analytical solutions. Temperature, anomaly, and heat flux are calculated... more
Abstract The temperature field around salt diapirs has been calculated with a finite-element method, whose accuracy is estimated by comparing simulation results with analytical solutions. Temperature, anomaly, and heat flux are calculated in cross-sections through two-dimensional (2D) and axisymmetric (3D) structures. The anomalous temperature field extends to a lateral distance of about 3 diapir radii from the diapir center. At depth the anomaly disappears at about 2.5 times the depth to the base of the diapir.