The use of new acoustic logging devices that record data with directional sensors required the development of new software. The article describes the innovative technology of data processing of multipole acoustic logging Parmalog.Acoustic on the example of a new domestic borehole device. The technology provides logging data processing in vertical and inclined boreholes. The construction of either a dipole signal by subtracting signals from two oppositely directed sensors, or a monopole signal by summing the signals is performed at the processing stage in the software. This method of recording and processing data makes it possible to determine the slowness of target waves in each direction and to assess the position of the device in the borehole. New ways to assess the quality of the original signal allow to reach a new level of metrological support, to assess the quality of data before summation or subtraction. New, previously unused, methods for detailed anisotropy analysis help in solving complex problems of estimating the direction and anisotropy value. The dispersion analysis tool can be used to assess radial anisotropy and determine the cause of anisotropy (asymmetry of horizontal stress, intrinsic anisotropy due to shale or fracturing, deformation of the borehole wall). The results of the calculation of the main elastic modules, the Poisson's ratio and the Thomsen parameter can be used in modeling the stress state of rocks. The use of modern mathematical apparatus and data processing methods in the Parmalog.Acoustic software opens up new opportunities for studying the downhole space by acoustic methods.
References
1. Certificate of registration of the computer program no. 2004610273, Modul'naya sistema obrabotki i interpretatsii dannykh geofizicheskikh issledovaniy skvazhin (“Sonata”) (Modul'naya sistema obrabotki i interpretatsii dannykh geofizicheskikh issledovaniy skvazhin (“Sonata”)), Authors: Belov S.V., Zaichkin E.V., Naugol'nykh O.V., Tashkinov I.V., Shumilov A.V.
2. Certificate of registration of the computer program no. 2019661637, Programmnyy kompleks "ParmaLog. Acoustic" (Obrabotka dannykh mul'tipol'nogo akusticheskogo karotazha) (Software package "ParmaLog. Acoustic" (Processing of multipole acoustic logging data)), Authors: Belov S.V., Tashkinov I.V., Shumilov A.V.
3. Haldorsen J.B.U., Johnson D.L., Plona T. et al., Borehole acoustic waves, Oilfield Review, 2006, no. 18, pp. 34–43.
4. Saxena V., Krief M., Adam L., Handbook of borehole acoustics and rock physics for reservoir characterization, Elsevier, 2018.
5. Alford R.M., Shear data in the presence of azimuthal anisotropy, Presented at the 56th Annual SEG Meeting, 1986, DOI: 10.1190/1.1893036
6. Kimball S.V., Marzetta T.L., Semblance processing of borehole acoustic array data, Geophysics, 1984, V. 49, no. 3, pp. 274–281, DOI: 10.1190/1.1441659
7. Belov S.V., Chistyakov N.Yu., Anisotropy estimation for multipole sonic logs (In Russ.), Neft'.Gaz.Novatsii, 2019, no. 2, pp. 60–64.
8. Shumilov A.V., Modul'naya sistema obrabotki informatsii pri geofizicheskikh issledovaniyakh v skvazhinakh: monografiya (Modular information processing system for well logging), Perm: Publ. of Perm State University, 2022, 282 p.
9. Tang X., Chunduru R.K., Simultaneous inversion of formation shear-wave anisotropy parameters from cross-dipole acoustic-array waveform data, Geophysics, 1999, V. 64 (5), DOI: 10.1190/1.1444654
10. Tichelaar B.W.,
