Wireline Sonic Waveform Data
Science operator: Sandia Technologies, LLC
Hole: Tandem Lot 1
Location: NYS Thruway tandem lot at Exit 14W.
Latitude: 41° 6.216' N
Longitude: 74° 1.62' W
Logging date (Run 1): August 31-September 2, 2011
Logging date (Run 2): October 15-19, 2011
Kelly bushing (drill floor): 16 ft above ground
Casing (Run 1): 13.375 in with casing shoe @ 603 ft (drillers); 602 ft (Schlumberger)
Casing (Run 2): 9.625 in with casing shoe @ 1496 (drillers); 1492 ft (Schlumberger)
Total depth: 6885 ft
TOOL USED: Sonic Scanner
Recording mode: Monopole P&S Far (low and medium frequency), Lower and Upper transmitter (medium frequency), Cross Dipole.
Remarks about
the recording: none.
Acoustic
data are recorded in DLIS format. Each of the thirteen waveforms generally
consists of 512 samples in far monopole mode, 763 in X-dipole and Y-dipole modes, and 256 in upper and lower monopole modes, each recorded every 10
(monopole P&S modes) and 40 microsec (X- and Ydipole and Stoneley modes), at depth
intervals of 15.24 cm (6 inches). The original data in DLIS format is first
loaded on a Sun system using GeoFrame software. The packed waveform data files
are run through a GeoFrame module that applies a gain correction and then converted into ASCII and finally binary format.
Each line is composed of the entire waveform set recorded at each depth, preceded by the depth (multiplied by 10 to be stored as an integer). For example, in the case of 13 waveforms with 256 samples per waveform, this corresponds to 1 + 13x256 = 3329 columns (6657 columns for 512 samples/waveform, 9920 columns for 763 samples/waveform). The number of rows and colums for each file created are listed below.
Sonic Scanner from
FMI/SonicScanner/PPC/EDTC (casing at 602 ft) - Run 1C, main
Number of rows: 1797
TANDEM1_far_mono_lf_1_main.bin: 602-1500 ft / Number of columns: 6657
TANDEM1_far_mono_mf_1_main.bin: 602-1500 ft / Number of columns: 6657
TANDEM1_far_mono_mf_azi_1_main.bin: 602-1500 ft / Number of columns: 26625
TANDEM1_lower_mono_mf_1_main.bin: 602-1500 ft / Number of columns: 3329
TANDEM1_lower_mono_mf_azi_1_main.bin: 602-1500 ft / Number of columns: 13313
TANDEM1_upper_mono_mf_1_main.bin: 602-1500 ft / Number of columns: 3329
TANDEM1_X_cd_il_1_main.bin: 602-1500 ft / Number of columns: 9920
TANDEM1_X_cd_cl_1_main.bin: 602-1500 ft / Number of columns: 9920
TANDEM1_Y_cd_il_1_main.bin: 602-1500 ft / Number of columns: 9920
TANDEM1_Y_cd_cl_1_main.bin: 602-1500 ft / Number of columns: 9920
Sonic Scanner from
FMI/SonicScanner/PPC/EDTC (open hole) - Run 1C, repeat
Number of rows: 615
TANDEM1_far_mono_lf_1_rep.bin: 1193-1500 ft / Number of columns: 6657
TANDEM1_far_mono_mf_1_rep.bin: 1193-1500 ft / Number of columns: 6657
TANDEM1_far_mono_mf_azi_1_rep.bin: 1193-1500 ft / Number of columns: 26625
TANDEM1_lower_mono_mf_azi_1_rep.bin: 1193-1500 ft / Number of columns: 13313
TANDEM1_upper_mono_mf_1_rep.bin: 1193-1500 ft / Number of columns: 3329
TANDEM1_X_cd_il_1_rep.bin: 602-1500 ft: 1193-1500 ft / Number of columns: 9920
TANDEM1_X_cd_cl_1_rep.bin: 602-1500 ft: 1193-1500 ft / Number of columns: 9920
TANDEM1_Y_cd_il_1_rep.bin: 602-1500 ft: 1193-1500 ft / Number of columns: 9920
TANDEM1_Y_cd_cl_1_rep.bin: 602-1500 ft: 1193-1500 ft
Sonic Scanner from
FMI/SonicScanner/PPC/EDTC (casing at 1492 ft) - Run 2B, main
Number of rows: 10145
TANDEM1_lower_mono_mf_2_mu.bin: 1492-6564 ft / Number of columns: 3329
TANDEM1_upper_mono_mf_2_mu.bin: 1492-6564 ft / Number of columns: 3329
The following had to be split into 2 intervals because of the size of files
Number of rows: 5017
TANDEM1_far_mono_lf_2_mu1.bin: 1492-4000 ft / Number of columns: 6657
TANDEM1_far_mono_mf_2_mu1.bin: 1492-4000 ft / Number of columns: 6657
Number of rows: 5129
TANDEM1_far_mono_mf_2_mu2.bin: 4000-6564 ft / Number of columns: 6657
TANDEM1_far_mono_lf_2_mu2.bin: 4000-6564 ft / Number of columns: 6657
The following had to be split into 6 intervals because of the size of the files
Number of rows: 1691
TANDEM1_far_mono_mf_azi_2_mu1.bin: 1492-2337 ft / Number of columns: 26625
TANDEM1_far_mono_mf_azi_2_mu2.bin: 2337-3182 ft / Number of columns: 26625
TANDEM1_far_mono_mf_azi_2_mu3.bin: 3182-4027 ft / Number of columns: 26625
TANDEM1_far_mono_mf_azi_2_mu4.bin: 4027-4872 ft / Number of columns: 26625
TANDEM1_far_mono_mf_azi_2_mu5.bin: 4872-5717 ft / Number of columns: 26625
Number of rows: 1695
TANDEM1_far_mono_mf_azi_2_mu6.bin: 5717-6564 ft / Number of columns: 26625
The following had to be split into 4 intervals because of the size of the files
Number of rows: 2537
TANDEM1_lower_mono_mf_azi_2_mu1.bin: 1492-2760 ft / Number of columns: 13313
TANDEM1_lower_mono_mf_azi_2_mu2.bin: 2760-4028 ft / Number of columns: 13313
TANDEM1_lower_mono_mf_azi_2_mu3.bin: 4028-5296 ft / Number of columns: 13313
TANDEM1_lower_mono_mf_azi_2_mu4.bin: 5296-6564 ft / Number of columns: 13313
The following had to be split into 3 intervals because of the size of the files
TANDEM1_X_cd_il_2_mu1.bin: 1492-3182 ft / Number of columns: 9920
TANDEM1_X_cd_cl_2_mu1.bin: 1492-3182 ft / Number of columns: 9920
TANDEM1_Y_cd_il_2_mu1.bin: 1492-3182 ft / Number of columns: 9920
TANDEM1_Y_cd_cl_2_mu1.bin: 1492-3182 ft / Number of columns: 9920
TANDEM1_X_cd_il_2_mu2.bin: 3182-4872 ft / Number of columns: 9920
TANDEM1_X_cd_cl_2_mu2.bin: 3182-4872 ft / Number of columns: 9920
TANDEM1_Y_cd_il_2_mu2.bin: 3182-4872 ft / Number of columns: 9920
TANDEM1_Y_cd_cl_2_mu2.bin: 3182-4872 ft / Number of columns: 9920
Number of rows: 3385
TANDEM1_X_cd_il_2_mu3.bin: 4872-6564 ft / Number of columns: 9920
TANDEM1_X_cd_cl_2_mu3.bin: 4872-6564 ft / Number of columns: 9920
TANDEM1_Y_cd_il_2_mu3.bin: 4872-6564 ft / Number of columns: 9920
TANDEM1_Y_cd_cl_2_mu3.bin: 4872-6564 ft / Number of columns: 9920
Sonic Scanner from
FMI/SonicScanner/PPC/EDTC (open hole) - Run 2B, main
Number of rows: 904
TANDEM1_far_mono_lf_2_ml.bin: 6424.5-6876 ft / Number of columns: 6657
TANDEM1_far_mono_mf_2_ml.bin: 6424.5-6876 ft / Number of columns: 6657
TANDEM1_far_mono_mf_azi_2_ml.bin: 6424.5-6876 ft / Number of columns: 26625
TANDEM1_lower_mono_mf_azi_2_ml.bin: 6424.5-6876 ft / Number of columns: 13313
TANDEM1_upper_mono_mf_2_ml.bin: 6424.5-6876 ft / Number of columns: 3329
TANDEM1_X_cd_il_2_ml.bin: 6424.5-6876 ft / Number of columns: 9920
TANDEM1_X_cd_cl_2_ml.bin: 6424.5-6876 ft / Number of columns: 9920
TANDEM1_Y_cd_il_2_ml.bin: 6424.5-6876 ft / Number of columns: 9920
TANDEM1_Y_cd_cl_2_ml.bin: 6424.5-6876 ft / Number of columns: 9920
Sonic Scanner from FMI/SonicScanner/PPC/EDTC (open hole) - Run 2B, repeat
Number of rows: 762
TANDEM1_far_mono_mf_azi_2_rep.bin: 6494.5-6875 ft 26625
TANDEM1_lower_mono_mf_azi_2_rep: 6494.5-6875 ft / Number of columns: 13313
All values are
stored as '32 bits IEEE float'.
Any image or signal-processing program should allow to import the files and display the data.
The sonic
waveform files are NOT depth-shifted to the seafloor or depth-matched to a reference run . Please refer to the DEPTH SHIFT section in the
standard data processing documentation file for further information about depth-shifting and depth-matching..
For users interested in reading and
converting the data to a format more suitable for their own purpose, the
fortran declaration used to open the file *.bin would be:
open (1, file = *.bin,access = 'direct', recl = 4*(1+nrec*nsamples))
where nrec is the number of receivers (13 in the case of the Sonic Scanner) and nsamples the number of samples per waveforms.
If the total number of depths where waveforms were recorded is ndepth (for a 150 m interval with data every 15cm, ndepth would be 1001), a generic loop to read the data would be
do k = 1, ndepth
...
read(1, rec=1+k) depth(k), ((data(i,j,k), j=1,nsamples),i = 1,nrec))
...
enddo
the first record in each file is a header with some of the file specifications:
- number of depths
- number of samples /trace
- number of receivers
- tool number = 3 (Sonic Scanner)
- mode (1 = Y-Dipole, 2 = X-Dipole, 3 = Stoneley, 4 = Monopole)
- vertical sampling interval
- scaling factor for depth
- waveform sampling rate in microseconds
For further questions about the logs, you may direct your questions to:
Cristina Broglia
Phone: 845-365-8343
Fax: 845-365-3182
E-mail: Cristina Broglia
Gilles Guerin
Phone: 845-365-8671
Fax: 845-365-3182
E-mail: Gilles Guerin