Implant placement in severely atrophic jaws is especially challenging because of the poor quality and quantity of the future implant bed. Although various bone augmentation procedure like ridge augmentation, sinus lif...Implant placement in severely atrophic jaws is especially challenging because of the poor quality and quantity of the future implant bed. Although various bone augmentation procedure like ridge augmentation, sinus lift these procedures are possible today but it may lead to surgical morbidity they increase the risks and costs of dental implant treatment as well as the number of necessary operations. Also sometimes the patient is not agreeing for such extensive surgical procedures, according to the well-known implantological rules for dental restorations, crestal implants are indicated in situations when an adequate vertical bone supply is given but single piece dental implant (basal implants) is a viable treatment option derives support from the basal bone area which usually remains free from the infection and less prone to resorption.展开更多
This study evaluates the Ranikot Formation in the Mehar Block of the Lower Indus Basin,where the Kirthar Fold and Thrust Belt creates a structurally challenging setting.The reservoir is notably heterogeneous,and a maj...This study evaluates the Ranikot Formation in the Mehar Block of the Lower Indus Basin,where the Kirthar Fold and Thrust Belt creates a structurally challenging setting.The reservoir is notably heterogeneous,and a major thrust connecting the footwall and hanging wall of the anticline increases the likelihood of early water breakthrough,especially along ramp segments.To address these complexities,well-log data were tied to seismic information to improve the prediction of reservoir facies across the crestal parts of the structure.Seismic interpretation established the overall geometry,while petrophysical analysis defined the lithology and fluid distribution,highlighting a gasbearing interval in Mehar-01 with about 40%shale,17%effective porosity,and 61%gas saturation.Spectral decomposition improved bed resolution and showed that frequencies between 22 and 27 Hz are most effective for identifying thin beds and channelized sands.Seismic inversion provided additional insight into litho-fluid variations,with the model-based method yielding clearer continuity and lower error(0.09)than the maximum likelihood sparse spike inversion(0.17).Impedance and spectral attributes were integrated through a Probabilistic Neural Network,predicting porosity values of 13–20% in the crestal zones.This integrated workflow enhances reservoir understanding and reduces uncertainty in this structurally complex region.展开更多
文摘Implant placement in severely atrophic jaws is especially challenging because of the poor quality and quantity of the future implant bed. Although various bone augmentation procedure like ridge augmentation, sinus lift these procedures are possible today but it may lead to surgical morbidity they increase the risks and costs of dental implant treatment as well as the number of necessary operations. Also sometimes the patient is not agreeing for such extensive surgical procedures, according to the well-known implantological rules for dental restorations, crestal implants are indicated in situations when an adequate vertical bone supply is given but single piece dental implant (basal implants) is a viable treatment option derives support from the basal bone area which usually remains free from the infection and less prone to resorption.
文摘This study evaluates the Ranikot Formation in the Mehar Block of the Lower Indus Basin,where the Kirthar Fold and Thrust Belt creates a structurally challenging setting.The reservoir is notably heterogeneous,and a major thrust connecting the footwall and hanging wall of the anticline increases the likelihood of early water breakthrough,especially along ramp segments.To address these complexities,well-log data were tied to seismic information to improve the prediction of reservoir facies across the crestal parts of the structure.Seismic interpretation established the overall geometry,while petrophysical analysis defined the lithology and fluid distribution,highlighting a gasbearing interval in Mehar-01 with about 40%shale,17%effective porosity,and 61%gas saturation.Spectral decomposition improved bed resolution and showed that frequencies between 22 and 27 Hz are most effective for identifying thin beds and channelized sands.Seismic inversion provided additional insight into litho-fluid variations,with the model-based method yielding clearer continuity and lower error(0.09)than the maximum likelihood sparse spike inversion(0.17).Impedance and spectral attributes were integrated through a Probabilistic Neural Network,predicting porosity values of 13–20% in the crestal zones.This integrated workflow enhances reservoir understanding and reduces uncertainty in this structurally complex region.
