Device and method for locating microseismic events using array of receivers

A device for locating a microseismic event taking place in a subsurface of the earth, the device comprising:

• an interface configured to receive recorded seismic data S(t, Rc) acquired by a plurality of receivers as a function of time t and a position Rc;
• and
• a processor connected to the interface and configured to,
• receive a reference signal model SiMo(t, Rc) that corresponds to seismic data recorded by the plurality of receivers if an explosion occurs at an injection point in the subsurface,
• time correlate the recorded seismic data S(t, Rc) with the reference signal model SiMo(t, Rc) to determine correlated seismic data DMSS,
• calculate a detection curve for each of plural cells in a given volume in the subsurface of the earth based on the correlated seismic data DMSS, and
• determine a seismic location in the volume of the microseismic event based on a largest value of maximums of the detection curves calculated for various points of the given volume in the subsurface.

A computer readable medium including computer executable instructions, wherein the instructions, when executed, implement a method for locating a microseismic event taking place in a subsurface of the earth, the method comprising:

• receiving recorded seismic data S(t, Rc) acquired by a plurality of receivers as a function of time t and a position Rc;
• receiving a reference signal model SiMo(t, Rc) that corresponds to seismic data recorded by the plurality of receivers if an explosion occurs at an injection point in the subsurface;
• time correlating the recorded seismic data S(t, Rc) with the reference signal model SiMo(t, Rc) to determine correlated seismic data DMSS;
• calculating a detection curve for each of plural cells in a given volume in the subsurface of the earth based on the correlated seismic data DMSS;
• and
• determining a seismic location in the volume of the microseismic event based on a largest value of maximums of the detection curves calculated for various points of the given volume in the subsurface.