Patent ID: 9720118
Date: 2017-08-01
CPC Classifications: E21B,G01H,G01V

Claim:
1. A system deployed within a wellbore for detecting microseismic events in a formation adjacent the wellbore, comprising: at least one 3-component microseismic sensor deployed in the wellbore adjacent the microseismic events for detecting compressional and shear waves for establishing a first set of data resulting from at least the microseismic events in the formation; and a linear array of distributed fiber optic sensors extending along at least a portion of the wellbore, uphole of the at least one 3-component microseismic sensor, for detecting compressional waves within or adjacent the wellbore for establishing a second set of data for mapping at least noise within the wellbore, wherein the mapping of the second set of data permits extrapolation of noise at the at least one 3-component microseismic sensor, the extrapolated noise being subtracted from the first set of data for producing signals for locating the microseismic event in the formation.