Subsurface fracture measurement with polarimetric borehole radar

1999 ◽  
Vol 37 (2) ◽  
pp. 828-837 ◽  
Author(s):  
T. Miwa ◽  
M. Sato ◽  
H. Niitsuma
Keyword(s):  
Borehole Radar ◽  
Fracture Measurement

Identification of geo-bodies in borehole radar image based on Curvelet transform

2021 ◽  
Vol 189 ◽  
pp. 104325
Author(s):  
Li Li ◽  
Rui Wang ◽  
Tianxiang Peng ◽  
Jingyi Hao ◽  
Zhipeng Zhou ◽  
...  
Keyword(s):  
Curvelet Transform ◽  
Radar Image ◽  
Borehole Radar

Fusion Before Imaging Method for Heterogeneous Borehole Radar Subsurface Surveys

2021 ◽  
pp. 1-14
Author(s):  
Shijia Yi ◽  
Haining Yang ◽  
Na Li ◽  
Tingjun Li ◽  
Yong Fan ◽  
...  
Keyword(s):  
Imaging Method ◽  
Borehole Radar

Directional borehole radar calibration

2009 ◽  
Vol 67 (4) ◽  
pp. 352-360 ◽  
Author(s):  
O. Borchert ◽  
K. Behaimanot ◽  
A. Glasmachers
Keyword(s):  
Borehole Radar ◽  
Radar Calibration

$\hbox{HE}_{11}$ Mode Effect on Direct Wave in Single-Hole Borehole Radar

2011 ◽  
Vol 49 (2) ◽  
pp. 854-867 ◽  
Author(s):  
Satoshi Ebihara ◽  
Akihito Sasakura ◽  
Taro Takemoto
Keyword(s):  
Direct Wave ◽  
Single Hole ◽  
Mode Effect ◽  
Borehole Radar

BOREHOLE‐RADAR EXPLORATION IN A COAL SEAM

Geophysics ◽  
1977 ◽  
Vol 42 (6) ◽  
pp. 1254-1257 ◽  
Author(s):  
John C. Cook
Keyword(s):  
Coal Seam ◽  
Practical Importance ◽  
Low Resolution ◽  
Coal Seams ◽  
Australian Society ◽  
Great Practical Importance ◽  
The Third ◽  
Research Organizations ◽  
Borehole Radar ◽  
Experimental Use

The experimental use of “geologic radar” to explore through coal from mined passages underground has already been reported elsewhere (Cook, 1973, 1974). Low‐resolution borehole radar work in salt, a much more favorable medium, has also been reported (Holzer et al., 1972). The purpose of this paper is to report the first known results of borehole radar tests in coal. The exploration of coal seams via boreholes from the surface is potentially a technique of great practical importance. The borehole experiment was performed in conjunction with a month‐long program of radar tests in Australian collieries and quarries performed under the sponsorship of the third ICOGEO and supported by several Australian mining and research organizations. A report on that program is expected to appear in the Bulletin of the Australian Society of Exploration Geophysicists some time during 1977.

Time-domain inverse scattering method for cross-borehole radar imaging

2002 ◽  
Vol 40 (7) ◽  
pp. 1640-1647 ◽  
Author(s):  
H. Jia ◽  
T. Takenaka ◽  
T. Tanaka
Keyword(s):  
Inverse Scattering ◽  
Time Domain ◽  
Radar Imaging ◽  
Inverse Scattering Method ◽  
Scattering Method ◽  
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.

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