GEOPHYSICAL RESEARCH, 2019, vol. 20, no. 2, pp. 39-55. https://doi.org/10.21455/gr2019.2-4
UDC 550.8.056
Abstract References Full text (in Russian)
MODERN APPROACHES TO NUMERICAL MODELING OF MICROSEISMIC EVENTS
A.V. Butorin, F.V. Krasnov, A.N. Sytnikov
Gazpromneft Science & Technology Centre, St.-Petersburg, Russia
Abstract. The study considers the actual issue of improving the accuracy of hydraulic fracturing mapping using microseismic monitoring. The relevance of this issue is determined, first of all, by increasing volume of hydraulic fracturing at development of modern hydrocarbon deposits. In this regard, it is necessary to develop methodological recommendations for conducting fieldwork in order to obtain the most informative results.
The authors of the paper used full-wave three-dimensional modeling of seismic emission from a point source simulating energy radiation in the course of fracture development. Several surface and borehole monitoring systems (the most common at the moment) have been modeled to register emerging elastic waves.
Simulation of a single source made it possible to obtain characteristic seismograms for different observation systems. Analysis of the results under different reception conditions makes it possible to examine the characteristic wave fields and analyze the main advantages and disadvantages of different observation systems.
The model results show that the maximum informativeness is achieved by a surface patch system that provides a wide observation aperture and a higher signal level against background noise.
Keywords: hydraulic fracturing, microseismic monitoring, full-wave modeling, seismic moment tensor.
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