METHOD OF DETERMINING THE LOCATION OF THE MICROSEISMIC FOCUS Russian patent published in 2017 - IPC G01V1/28 

FIELD: physics.

SUBSTANCE: according to the claimed method of locating the focus of a microseismic event during the processing of the original microseismic signal, it is decomposed into the detail layers (scales) d(n) with different energy and frequency characteristics. At each of these scales, d(n) is constructed as a straight-line function and, if it is maximized, the arrival time of the longitudinal component of the microseismic signal is found. To each of the original longitudinal and transverse components of the microseismic signal, a discrete wavelet transform is applied, followed by their decomposition into detailed layers (scales) d(n) with different energy and frequency characteristics. At each of these scales d(n), the ratios of the transverse amplitudes to the longitudinal amplitudes are constructed and the arrival time of the transverse component of the microseismic signal is found. The speed of the components of the microseismic signal is determined, on the basis of which the distance to the source of the microseismic event is calculated.

EFFECT: reduction of uncertainty in calculating the location of the source of the microseismic event during hydraulic fracturing of the formation.

4 cl, 5 dwg