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  1.  16
    Results of the Downhole Microseismic Monitoring at a Pilot Hydraulic Fracturing Site in Poland, Part I: Events Location and Stimulation Performance.Wojciech Gajek, Jacek Trojanowski, Michał Malinowski, Marek Jarosiński & Marko Riedel - forthcoming - Interpretation:1-29.
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  2.  16
    Results of the Downhole Microseismic Monitoring at a Pilot Hydraulic Fracturing Site in Poland, Part II: Shear Wave Splitting Analysis.Wojciech Gajek, Michał Malinowski & James Verdon - forthcoming - Interpretation:1-36.
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    Results of the Downhole Microseismic Monitoring at a Pilot Hydraulic Fracturing Site in Poland — Part 1: Event Location and Stimulation Performance.Wojciech Gajek, Jacek Trojanowski, Michał Malinowski, Marek Jarosiński & Marko Riedel - 2018 - Interpretation: SEG 6 (3):SH39-SH48.
    A precise velocity model is necessary to obtain reliable locations of microseismic events, which provide information about the effectiveness of the hydraulic stimulation. Seismic anisotropy plays an important role in microseismic event location by imposing the dependency between wave velocities and its propagation direction. Building an anisotropic velocity model that accounts for that effect allows for more accurate location of microseismic events. We have used downhole microseismic records from a pilot hydraulic fracturing experiment in Lower-Paleozoic shale gas play in the (...)
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    Results of Downhole Microseismic Monitoring at a Pilot Hydraulic Fracturing Site in Poland — Part 2: S-Wave Splitting Analysis.Wojciech Gajek, Michał Malinowski & James P. Verdon - 2018 - Interpretation: SEG 6 (3):SH49-SH58.
    Observations of azimuthal seismic anisotropy provide useful information, notably on stress orientation and the presence of preexisting natural fracture systems, during hydraulic fracturing operations. Seismic anisotropy can be observed through the measurement of S-wave splitting on waveforms generated by microseismic events and recorded on downhole geophone arrays. We have developed measurements of azimuthal anisotropy from a Lower Paleozoic shale play in northern Poland. The observed orthorhombic anisotropic symmetry system is dominated by a vertically transverse isotropy fabric, produced by the alignment (...)
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    To: “Results of the Downhole Microseismic Monitoring at a Pilot Hydraulic Fracturing Site in Poland — Part 1: Event Location and Stimulation Performance,” Wojciech Gajek, Jacek Trojanowski, Michał Malinowski, Marek Jarosiński, and Marko Riedel, Interpretation, 6, No. 3, SH39–SH48, Http://Dx.Doi.Org/10.1190/Int-2017-0205.1. [REVIEW]Wojciech Gajek, Jacek Trojanowski, Michał Malinowski, Marek Jarosiński & Marko Riedel - 2018 - Interpretation: SEG 6 (4):Y3-Y5.
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