SURFACE DETECTION AND LOCATION OF MICROSEISMIC EVENTS AND EARTHQUAKES WITHOUT THE USE OF A VELOCITY MODEL

摘要

A system and method for hydraulic fracturing and monitoring microseismic events related to hydraulic fracturing are described. One method describes a method of hydraulic fracturing gas production comprising drilling and casing a gas production well with a horizontal section within a formation layer, perforating the horizontal section of the well at a known location, and monitoring the resulting seismic waves using an array of geophones. Using the seismic waves resulting from the perforation shot, subsequent microseismic events may be located using a root mean square velocity and average velocity and without the use of a depth velocity model.