Schlumberger techlog if then
The orange area is a layer of predominant calcite lithology and meso-pores texture. The boxed areas of this composite plot for the well show the top two potential target layers. Open (1, file = *.Figure 1: One challenge of a pilot well offshore Brazil was to understand the multi-mineral composition of the rock and identify intervals with the largest production potential. Then, if the number of depths, samples per waveform/receiver, and receivers are nz, ns, and nrec, respectively, a command to open the file would be: waveform sampling rate in microseconds *Īll those values are stored as 4 bytes integers, except for the ones marked by an asterisk, stored as 4 bytes IEEE floating point numbers. scaling factor for depth (1.0 = meters 0.3048 = feet) * mode (1 = Lower Dipole, 2 = Upper Dipole, 3 = Stoneley, 4 = Monopole) tool number (0 = DSI 1 = SonicVISION 2 = SonicScope 3 = Sonic Scanner 4 = XBAT 5 = MCS 6 = SDT 7 = LSS 8 = SST 9 = BHC 10 = QL40 11 = 2PSA) number of samples per waveform and per receiver Read (1, rec = 1)nz, ns, nrec, ntool, mode, dz, scale, dt Open (1, file = *.bin,access = 'direct', recl = 50) <- NB:50 is enough to real all fields The first step is to extract the files dimensions and specification from the header, which is the first record in each file: NOTE: For users interested in converting the data to a format more suitable for their own purpose, a simple routine to read the binary files would include a couple of basic steps (here in old fashioned fortran 77, but would be similar in matlab or other languages): Waveform files were depth-shifted to the seafloor (-6718 m).
Schlumberger techlog if then software#
GC955-H_scope_qp_2in.bin: -1 to 18866 ftbsfĪll values are stored as '32 bits IEEE float'.Īny numerical software or programing language (matlab, python.) can import the files for further analysis of the waveforms. Number of rows: 1674 (monopole low frequency mode, 6-in sampling rate) Number of rows: 3776 (monopole and quadrupole modes, 6-in sampling rate) Rows: 5017 (monopole low frequency mode, 2-in sampling rate) Rows: 11324 (monopole and quadrupole modes, 2-in sampling rate) Each of the 12 waveformsĪcquired with the SonicScope tool consists of 256 samples.ġ2 waveforms with 256 samples per waveform, this corresponds to 1 + 12x256 = 3073 Monopole modes), at depth intervals of 2 and 6 inches. P&S monopole mode) and 40 microsec (quadrupole and low frequency Were output as LAS files using Techlog and were finally converted into binary files and GIF images using software written in-house.The sonic waveforms are sampled every 20 (monopole In all formations and shear slowness in fast formations. MONOPOLE P&S MODE: measures compressional slowness Recording mode: Monopole P&S, Low Frequency Number of rows: 3550 (6-in sampling rate) In this hole, the specifications of the files are: In the case ofĤ waveforms with 151 samples per waveform, this corresponds to 1 + 4x151 = 605Ĭolumns. The depth (multiplied by 10 to be stored as an integer). Line of the binary files is composed of the entire waveform set recorded at each depth, preceded by Each of the four waveformsĪcquired with the sonicVISION tool consists of 151 samples, at depth Were output as LAS files using Techlog and were finally converted into binary files and GIF images using software written in-house.
Sea floor depth (step in GR log): 6718 ftbrfĭata were acquired by Schlumberger/Anadrill in DLIS format and were uploaded in June 2020 using Schlumberger Techlog software. Chevron Gulf of Mexico Gas Hydrate JIP Drilling Program