“x2ipi” tool box for dc and ip 2d measurements with syscal and...
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![Page 1: “X2ipi” tool box for DC and IP 2D measurements with SYSCAL and ELRECgeoelectric.ru/publ/x2ipi_04.pdf · 2015. 7. 24. · Syscal or Elrec equipments Transfer and process data with](https://reader031.vdocuments.us/reader031/viewer/2022012008/611e32289e5c1d21920b4db0/html5/thumbnails/1.jpg)
“X2ipi” tool box for DC and IP 2D measurements with SYSCAL and ELREC
А. Bobachev (INRA), with support ofA. Cataldi (TRX Consulting, Venezuela),J.-F. Girard (BRGM),R. Guerin (University Paris 6),H. Robain (IRD),
![Page 2: “X2ipi” tool box for DC and IP 2D measurements with SYSCAL and ELRECgeoelectric.ru/publ/x2ipi_04.pdf · 2015. 7. 24. · Syscal or Elrec equipments Transfer and process data with](https://reader031.vdocuments.us/reader031/viewer/2022012008/611e32289e5c1d21920b4db0/html5/thumbnails/2.jpg)
2D resistivity imaging
Create a sequence ofreading with
Electre III, Electre II“x2ipi” tool box,
complementarysoftware
Take reading in the fied withSyscal or Elrec equipments
Transfer and process datawith Prosys
Interprete the data withRes2Dinv
![Page 3: “X2ipi” tool box for DC and IP 2D measurements with SYSCAL and ELRECgeoelectric.ru/publ/x2ipi_04.pdf · 2015. 7. 24. · Syscal or Elrec equipments Transfer and process data with](https://reader031.vdocuments.us/reader031/viewer/2022012008/611e32289e5c1d21920b4db0/html5/thumbnails/3.jpg)
x2ipi: sequences! Compatible with ElectreII and Electre software! Editing of sequences
! Change “miltinode” number! Merger and separating sequences for different array
type! Removing a faulty electrode! Removing measurement lines and particular quadripoles! Preparing a “Roll along” [*.seq] file! Preparing reciprocal array
! Create new sequences! Create a sequence from data file (Res2dInv,
Prosys)
![Page 4: “X2ipi” tool box for DC and IP 2D measurements with SYSCAL and ELRECgeoelectric.ru/publ/x2ipi_04.pdf · 2015. 7. 24. · Syscal or Elrec equipments Transfer and process data with](https://reader031.vdocuments.us/reader031/viewer/2022012008/611e32289e5c1d21920b4db0/html5/thumbnails/4.jpg)
Create new sequences
MN=a
MN=3 a
MN=5 a
MN=9 a
MN=15 a
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Using “x2ipi” for data processing
! Compatible with Prosys, Electre and Res2Dinvsoftware
! Presentation of data! Trimming bad measurements (manual, q-factor,
voltage, current, IP, bad electrode)! Merger and separating data for different array type! Comparing data files! Time lapse data processing! “Median” filtration of data for “geological noise”
elimination! Export to different formats: Res2Dinv (standard or
general data format), SensInv2D, Ipi2win)
![Page 6: “X2ipi” tool box for DC and IP 2D measurements with SYSCAL and ELRECgeoelectric.ru/publ/x2ipi_04.pdf · 2015. 7. 24. · Syscal or Elrec equipments Transfer and process data with](https://reader031.vdocuments.us/reader031/viewer/2022012008/611e32289e5c1d21920b4db0/html5/thumbnails/6.jpg)
Data presentation
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Reciprocal Schlumberger array optimized for Syscal Pro
N
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B
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B
A
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A
M
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M
B
B
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B
B
N
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M
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M
M
M
A
A
A
A
A
Schlumberger array
Asymmetrical array
Data of Henri Robain, IRD
![Page 8: “X2ipi” tool box for DC and IP 2D measurements with SYSCAL and ELRECgeoelectric.ru/publ/x2ipi_04.pdf · 2015. 7. 24. · Syscal or Elrec equipments Transfer and process data with](https://reader031.vdocuments.us/reader031/viewer/2022012008/611e32289e5c1d21920b4db0/html5/thumbnails/8.jpg)
Data comparing (data by R.Guerin)
![Page 9: “X2ipi” tool box for DC and IP 2D measurements with SYSCAL and ELRECgeoelectric.ru/publ/x2ipi_04.pdf · 2015. 7. 24. · Syscal or Elrec equipments Transfer and process data with](https://reader031.vdocuments.us/reader031/viewer/2022012008/611e32289e5c1d21920b4db0/html5/thumbnails/9.jpg)
Preparation of data file for time lapse 2D inversion
Time-lapse data Res2dInv format Inversion of
apparentresistivity
General Res2dInvformat
Dipole-dipole
Wenner
T1
T2
T3
T4
Res2dInv
Geoelectricalcross-sections fordifferent times
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“Median” processing
1D( , ) ( , ) P( ) C ( ) C ( ) ( , )A Ba a MN A Bx r x r x x x x rρ = ρ ⋅ ⋅ ⋅ ⋅δ
! ! " "1D( , ) ( , ) P( ) C ( ) C ( ) ( , )A B
a a MN A Bx r x r x x x x rρ = ρ ⋅ ⋅ ⋅ ⋅δ!
M. Ritz, H. Robain, E. Pervago, Y. Albouy, C. Camerlynck, M. Descloitres and A. Mariko. 1999. "Improvement to resistivity pseudosection modelling by removal of near-surface inhomogeneity effects: application to a soil system in south Cameroon". Geophysical Prospecting, 47, pp. 85 -101
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Median processingStep 1. Decomposition
( )( )
1D
1D
1D
1D
( , ) ( , )
( , ) / ( , ) P( )
( , ) / ( , ) P( ) C ( );C ( )
( , ) / ( , ) P( ) C ( ) C ( ) ( , )
a a
a a MN
A Ba a MN A B
A Ba a MN A B
x r x r
x r x r x
x r x r x x x
x r x r x x x x r
ρ ⇒ ρ
ρ ρ ⇒ ρ ρ ⋅ ⇒ ρ ρ ⋅ ⋅ ⋅ ≡ δ
Data by Roger Guerin, Paris 6
Origin
al1D
P &
CRes
idual
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Median processingStep 2. Smoothing
Parameters for smoothing
Data by Roger Guerin, Paris 6
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Original data
Median processingStep 3. Reconstruction
Rem
ove
dpar
t
Recalculation 1D part
Smoothed components
Smoothed data
Data by Roger Guerin, Paris 6
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Median processing for apparent resistivityExample by A. Cataldi (TRX Consulting, Venezuela), Elrec
Sm
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Median processing for IPExample by A. Cataldi (TRX Consulting, Venezuela), Elrec
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Resu
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Example of data processing (data by J.-F. Girard (BRGM))
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dataR
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data
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Conclusions
!“x2ipi” tool box is supplementary software for 2D DC and IP data processing with some unique features (smoothing data by Median-algorithm,
work with data in General format of Res2dInv etc.)!“x2ipi” is compatible with ElectreII, Prosysand Res2dinv software!“x2ipi” can increase the efficiency of Syscaland Elrec units application
http://geophys.geol.msu.ru/x2ipi/x2ipi.html