Geophysical exploration in and around CTD Applied Method
- Slides: 15
Geophysical exploration in and around CTD
Applied Method • GPR • Electrical Resistivity Tomography (2 D, 3 D) • Elastic Velocity (3 D)
ERT Image (2 D) • Survey Area Line 2 End of CTD Line 1 Water conducting fracture CTD Plug 13 MI 40, 41 Borehole (pressure monitoring) • A~D Borehole for 3 D tomography (Resistivity, Elastic wave) • Conducted only on the same side as line 1 • Survey Date Before closure test July, 2014 After closure test (1 st ) October, 2017 After closure test (2 st ) February, 2018
Time lapse Resistivity Image(Line 1) Before closure test (July, 2014) B E A Pressure monitoring (13 MI 41) A, B, E Borehole for tomography Fracture Water Conducting Fracture After closure test (1 st, October, 2017) B E A Pressure monitoring (13 MI 41) After closure test (2 nd, February, 2018) B End of CTD Plug
Time lapse Resistivity Image(Line 2) Before closure test (July, 2014) Pressure monitoring (13 MI 40) A, B, E Borehole for tomography Fracture Water Conducting Fracture After closure test (1 st, October, 2017) After closure test (2 nd, February, 2018) End of CTD Pressure monitoring (13 MI 40) 水圧観測孔 Plug
Tomography Image (Resistivity, Elastic wave) • Survey Area Line 2 Water conducting fracture End of CTD Line 1 Target area CTD Plug • Survey Date Plug 13 MI 40, 41 Borehole (pressure monitoring) • Wall on only 1 side (13 MI 40 side) • 5 Boreholes • Length of each borehole: 2 m Before closure test July, 2014
Tomographic Image (Resistivity) • Scanned Volume: 1. 75[m]* 2. 0[m] C D C End of CTD D Plug A Depth Wall B End of CTD Plug B Depth Wall A
Tomographic Image (P wave velocity) • Scanned Volume: 1. 75[m]* 2. 0[m] Wall End of CTD Depth Plug
Tomographic Image (Elastic wave attenuation) • Scanned Volume: 1. 75[m]* 2. 0[m] Plug Wall End of CTD Depth Plug Depth Wall End of CTD
GPR Image (GPR Reflection) • Survey Area • Both in inclined drift and CTD. • Total length of measurement line: 505 m (Not all profiles are shown in this slide) • Survey Date Before closure test Several times before March, 2014
CTD (Wall) Configuration CMP Frequency 5~ 500 MHz Wall (Left side) Wall (End of CTD) Plug End of CTD
CTD (floor) End of CTD Configuration 0 offset Frequency 800 MHz End of CTD
CTD (Both floor and Wall) Configuration 0 offset Frequency 800 MHz Left wall Floor End of CTD Floor Right wall Wall of End of CTD Plug
Inclined (3 D like profile) Shaft • Floor (Inclined) • 5 Parallel survey lines Configuration 0 offset Frequency 800 MHz Plug
Inclined (Right wall) Configuration 0 offset Frequency 800 MHz Shaft Plug
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- Gravity method of geophysical exploration
- Ngdc
- Reservoir geophysical corporation
- Basilan at romblon tsunami
- Geophysical fluid dynamics
- Example of what goes around comes around
- Goes around comes around meaning
- Ctd ich
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- Ctd module 3
- Ctd modules
- üwww
- Ctd sections
- Ctd modules
- Ctd triangle