Abstract
Most sedimentary formations with fine layers can be characterized as transversely isotropic media. The evaluation of shear-wave anisotropy is critical in logging-while-drilling (LWD) applications. We developed a joint method to simultaneously invert formation shear-wave anisotropy and vertical shear velocity using LWD monopole and dipole dispersion data. Theoretical analysis demonstrates that formation shear-wave anisotropy significantly affects the dispersion characteristics of Stoneley and formation flexural waves. The inversion objective function was constructed based on the change in dispersion characteristics and was weighted by the spectra of multipole waves. Numerical results using synthetic examples demonstrate that the joint inversion method can not only alleviate the non-uniqueness problem but also help improve the accuracy of the inversion results. The comparison of different signal-to-noise ratio inversion results proved that the weighted inversion method is more accurate and stable.
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Cheng, C. H., Toksoez, M. N., and Willis, M. E., 1982, Determination of in situ attenuation from full waveform acoustic logs: Journal of Geophysical Research: Solid Earth, 87, 5477–5484.
Cui, Z. W., 2004, Theoretical and numerical study of modified Biot’s models, acoustoelectric well logging and acoustic logging while drilling excited by multipole acoustic sources: Ph.D. thesis, Jilin University.
Ekstrom, M. P., 1995, Dispersion estimation from borehole acoustic arrays using a modified matrix pencil algorithm: the 29th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, USA, 449–453.
He, X., and Hu, H., 2009, Borehole flexural modes in transversely isotropic formations: Low-frequency asymptotic velocity: Geophysics, 74(4), E149–E158.
He, X., Hu, H., and Guan, W., 2010, Fast and slow flexural waves in a deviated borehole in homogeneous and layered anisotropic formations: Geophysical Journal International, 181(1), 417–426.
He, X., Hu, H., and Wang, X., 2013, Finite difference modelling of dipole acoustic logs in a poroelastic formation with anisotropic permeability: Geophysical Journal International, 192(1), 359–374.
Hsu, C. J. and Sinha, B. K., 1998, Mandrel effects on the dipole flexural mode in a borehole: The Journal of the Acoustical Society of America, 104(4), 2025–2039.
Hu, H., Zhang, C., and Zheng, X., 2017, Inversion of formation shear speed from dipole Scholte wave during logging while drilling in slow formations: 6th International Congress on Ultrasonics, Honolulu, Hawaii, USA, Paper ICU2017-21.
Joyce, B., Patterson, D., Leggett, J., and Dubinsky, V., 2001, Introduction of a new omni-directional acoustic system for improved real-time LWD sonic logging-tool design and field test results: SPWLA 42nd Annual Logging Symposium, Houston, Texas, Paper SS.
Kimball, C. V., and Marzetta, T. L., 1984, Semblance processing of borehole acoustic array data: Geophysics, 49(3), 274–281.
Li, X. Q., Chen, H., He, X., Wang, X. M., and Cong, J. S., 2013, Analyses on mode waves of acoustic logging while drilling in transversely isotropic formations: Chinese J. Geophysics (in Chinese), 56(9): 3212–3222.
Li, Y. H., Xu, S., Jiang, C., Su, Y. D., and Tang, X. M., 2020, Joint inversion of logging-while-drilling multipole acoustic data to determine formation shear-wave transverse isotropy: Geophysics, 85(4), D121–D132.
Oshima, A., Syresin, D., Blyth, M., and Schmitt, D. P., 2018, Advanced dipole shear measurements with a new logging while drilling sonic tool: SPWLA 59th Annual Logging Symposium, London, UK, Paper W.
Rao, B., Tang, X. M., and Su, Y. D., 2022, Theoretical calculation and mechanism analysis for component waves of acoustic logging while drilling in transversely isotropic formations: Chinese J. Geophysics (in Chinese), 65(8), 3198–3212.
Schmitt, D. P., 1988, Shear wave logging in elastic formations: Journal of the Acoustical Society of America, 84, 2215–2229.
Schoenberg, M., Muir, F., and Sayers, C. M., 1996, Introducing ANNIE: A simple three-parameter anisotropic velocity model for shales: Journal of Seismic Exploration, 5(1), 35–50.
Sinha, B. K., Norris, A. N., and Chang, S., 1994, Borehole flexural modes in anisotropic formations: Geophysics, 59, 1037–1052.
Su, Y. D., Jiang, C., Zhuang, C. X., Xu, S., and Tang, X. M., 2016, Joint inversion of logging-while-drilling multipole acoustic data to determine P- and S-wave velocities in unconsolidated slow formations: Geophysics, 81(5), D553–D560.
Tang, X. M., 2003, Determining formation shear-wave transverse isotropy from borehole Stoneley-wave measurements: Geophysics, 68(1), 118–126.
Tang, X. M., Dubinsky, V., Wang, T., Bolshakov, A., and Patterson, D., 2003, Shear-velocity measurement in the logging-while-drilling environment: Modeling and field evaluations: Petrophysics, 44(2), 79–90.
Tang, X. M., and Cheng, A., 2004, Quantitative borehole acoustic methods, Handbook of Geophysical Exploration: Seismic Exploration: Elsevier. Amsterdam, Netherlands.
Thomsen, L., 1986, Weak elastic anisotropy: Geophysics, 51(10), 1954–1966.
Wang, H., Fehler, M., Tao, G., and Wei, Z., 2016, Investigation of collar properties on data-acquisition scheme for acoustic logging-while-drilling: Geophysics, 81(6), D611–D624.
Wang, P., Bose, S., Sinha, B. K., and Blyth, M., 2016, Dipole shear anisotropy using logging-while-drilling sonic tools: SPWLA 57th Annual Logging Symposium, Reykjavik, Iceland, Paper PPPP.
Wang, P., Bose, S., Sinha, B. K., Lei, T., and Blyth, M., 2017, Logging-While-Drilling Dipole Shear Logging in Fast Formations Using Higher-Order Formation Flexural Mode: SPWLA 58th Annual Logging Symposium, Oklahoma City, Oklahoma, USA, Paper Y.
Wang R. J., and Qiao, W. X., 2015, Numerical study on quadrupole acoustic LWD in VTI formations: Chinese J. Geophysics (in Chinese), 58(8): 2862–2872.
Wei, J. Q., He, X., Chen, H., and Wang, X. M., 2018, Inversion of anisotropy in a TTI stratum using quadrupole acoustic LWD and multimode acquisition: Chinese J. Geophysics (in Chinese), 61(2), 792–802.
Wei, J. Q., He, X., Li, X. Q., Chen, H., and Wang, X. M., 2019, Simulation of acoustic LWD with an eccentric source and inversion of formation anisotropy: Chinese J. Geophysics (in Chinese), 62(4), 1554–1564.
White, J. E., and Tongtaow, C., 1981, Cylindrical waves in transversely isotropic media: Journal of the Acoustical Society of America, 70(4), 1147–1155.
White, J. E., Martineau-Nicoletis, L., and Monash, C., 1983, Measured anisotropy in Pierre shale: Geophysical Prospecting, 31(5), 709–725.
Xu, S., Tang, X. M., Su, Y. D., Lee, S. Q., and Zhuang, C. X., 2017, Determining formation S-wave transverse isotropy from borehole flexural-wave dispersion data: Geophysics, 82(2), D47–D55.
Xu, S., Tang, X. M., Su, Y. D., and Zhuang, C. X., 2018, Determining formation shear wave transverse isotropy jointly from borehole Stoneley-and flexural-wave data: Chinese J. Geophysics (in Chinese), 61(12), 5105–5114.
Zeng, F., Yue, W., Li, C., and Wang, Y., 2021, Estimation of transversely isotropic formation parameters using flexural and quadrupole dispersion data in the fast formation: Geophysics, 86(4), D125–D137.
Acknowledgments
The authors thank the reviewers for their comments and suggestions that helped to improve the manuscript. This study is supported by the National Natural Science Foundation of China (Grant No. 12174421) and the Hubei Key Laboratory of Advanced Aerospace Propulsion Technology (Grant No. KFJJ2020-02).
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Li Jia-Cheng is a postgraduate student majoring in Geodetection and Information Technology at the Institute of Acoustics, Chinese Academy of Sciences. He received his B.E. in Exploration Technology and Engineering from the China University of Petroleum (East China) in June 2020. His main research interests are acoustic logging and imaging.
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Li, JC., He, X. & Can, J. Joint inversion method of formation shear-wave anisotropy from logging-while-drilling acoustic data. Appl. Geophys. 19, 503–512 (2022). https://doi.org/10.1007/s11770-022-0947-1
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DOI: https://doi.org/10.1007/s11770-022-0947-1