scholarly journals Time-lapse borehole radar for monitoring rainfall infiltration through podosol horizons in a sandy vadose zone

2014 ◽  
Vol 50 (3) ◽  
pp. 2140-2163 ◽  
Author(s):  
Elmar Strobach ◽  
B. D. Harris ◽  
J. C. Dupuis ◽  
A. W. Kepic
Keyword(s):  
Vadose Zone ◽  
Time Lapse ◽  
Rainfall Infiltration ◽  
Borehole Radar

scholarly journals Quantitative estimation of groundwater recharge process through a vadose zone using time-lapse cross-borehole radar profiling

2007 ◽  
Vol 60 (6) ◽  
pp. 467-476 ◽  
Author(s):  
Seiichiro Kuroda ◽  
Masato Asano ◽  
Satoshi Nihira ◽  
Takehiko Okuyama ◽  
Hirotaka Saito ◽  
...  
Keyword(s):  
Groundwater Recharge ◽  
Vadose Zone ◽  
Quantitative Estimation ◽  
Time Lapse ◽  
Borehole Radar

scholarly journals Estimating reservoir permeability with borehole radar

Geophysics ◽  
2020 ◽  
Vol 85 (4) ◽  
pp. H51-H60
Author(s):  
Feng Zhou ◽  
Iraklis Giannakis ◽  
Antonios Giannopoulos ◽  
Klaus Holliger ◽  
Evert Slob
Keyword(s):  
Water Saturation ◽  
Time Lapse ◽  
Drilling Mud ◽  
Invasion Depth ◽  
Initial Water ◽  
Oil Drilling ◽  
Reservoir Evaluation ◽  
Reservoir Permeability ◽  
Borehole Radar ◽  
Porosity And Permeability

In oil drilling, mud filtrate penetrates into porous formations and alters the compositions and properties of the pore fluids. This disturbs the logging signals and brings errors to reservoir evaluation. Drilling and logging engineers therefore deem mud invasion as undesired and attempt to eliminate its adverse effects. However, the mud-contaminated formation carries valuable information, notably with regard to its hydraulic properties. Typically, the invasion depth critically depends on the formation porosity and permeability. Therefore, if adequately characterized, mud invasion effects could be used for reservoir evaluation. To pursue this objective, we have applied borehole radar to measure mud invasion depth considering its high radial spatial resolution compared with conventional logging tools, which then allows us to estimate the reservoir permeability based on the acquired invasion depth. We investigate the feasibility of this strategy numerically through coupled electromagnetic and fluid modeling in an oil-bearing layer drilled using freshwater-based mud. Time-lapse logging is simulated to extract the signals reflected from the invasion front, and a dual-offset downhole antenna mode enables time-to-depth conversion to determine the invasion depth. Based on drilling, coring, and logging data, a quantitative interpretation chart is established, mapping the porosity, permeability, and initial water saturation into the invasion depth. The estimated permeability is in a good agreement with the actual formation permeability. Our results therefore suggest that borehole radar has significant potential to estimate permeability through mud invasion effects.

Borehole Radar Attenuation-Difference Tomography During The Tracer/Time-Lapse Test At The Boise Hydrogeophysical Research Site

2003 ◽  
Author(s):  
Sarah E. Goldstein ◽  
Tim C. Johnson ◽  
Michael D. Knoll ◽  
Warren Barrash ◽  
William P. Clement
Keyword(s):  
Time Lapse ◽  
Research Site ◽  
Borehole Radar

An experiment of non-invasive characterization of the vadose zone via water injection and cross-hole time-lapse geophysical monitoring

2007 ◽  
Vol 5 (3) ◽  
pp. 183-194 ◽  
Author(s):  
Rita Deiana ◽  
Giorgio Cassiani ◽  
Andreas Kemna ◽  
Alberto Villa ◽  
Vittorio Bruno ◽  
...  
Keyword(s):  
Vadose Zone ◽  
Water Injection ◽  
Time Lapse ◽  
Geophysical Monitoring ◽  
Non Invasive

scholarly journals Seasonal Groundwater Recharge Characterization Using Time-Lapse Electrical Resistivity Tomography in the Thepkasattri Watershed on Phuket Island, Thailand

Hydrology ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 36 ◽  
Author(s):  
Yacob T. Tesfaldet ◽  
Avirut Puttiwongrak
Keyword(s):  
Electrical Resistivity ◽  
Groundwater Recharge ◽  
Vadose Zone ◽  
Rainy Season ◽  
Electrical Resistivity Tomography ◽  
Time Lapse ◽  
Dry Season ◽  
Discharge Zone ◽  
Hydrogeological Model ◽  
Resistivity Tomography

Understanding the recharge mechanisms in the vadose zone is crucial to groundwater management and artificial recharge development. In this study, a systematic characterization of seasonal groundwater recharge was done using time-lapse electrical resistivity tomography (time-lapse ERT). The objective of this study was to characterize the seasonal groundwater recharge through the vadose zone and streams. A total of six electrical resistivity surveys in two locations were taken during the dry and rainy seasons using an advanced geosciences incorporated (AGI) SuperSting R2 resistivity meter in 2018. Then, time-lapse inversion was calculated using the dry season ERT as the base model and the rainy season ERTs as the monitoring datasets. The results showed a significant decrease in inverted resistivity from the dry season to the rainy season, which suggests rainwater infiltration through the vadose zone. Similarly, significant water level rise was observed in wells monitored during the survey indicating groundwater recharge. The time-lapse ERT showed, in one case, the Nang Dak stream and the unsaturated zones are the preferential groundwater recharge zones throughout the year; in another case, the Rieng stream is the groundwater discharge zone and the vadose zone is the preferential recharge zone. Finally, a simplified conceptual hydrogeological model representing the study area is presented to visualize the recharge mechanisms in the study area.

Observations of Seasonal Dynamics in the Vadose Zone Using Borehole Radar and Resistivity

2001 ◽  
Author(s):  
Andrew Binley ◽  
Peter Winship ◽  
Roy Middleton ◽  
Magdeline Pokar ◽  
Jared West
Keyword(s):  
Vadose Zone ◽  
Seasonal Dynamics ◽  
Borehole Radar

Imaging Rainfall Infiltration Processes with the Time-Lapse Electrical Resistivity Imaging Method

2016 ◽  
Vol 173 (6) ◽  
pp. 2227-2239 ◽  
Author(s):  
Gang Zhang ◽  
Gui-Bin Zhang ◽  
Chien-chih Chen ◽  
Ping-Yu Chang ◽  
Tzu-Pin Wang ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Time Lapse ◽  
Rainfall Infiltration ◽  
Electrical Resistivity Imaging ◽  
Imaging Method ◽  
Resistivity Imaging ◽  
Infiltration Processes
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