Continuous microseismic mapping for real-time 3D event detection and location

摘要

A method for the detection and localization of microseismic events is proposed which operates in real-time. It provides hypocenters in three spatial dimensions along with an estimate of the event origin time. Sensor positions may be distributed in 3D space, and are not confined to linear arrays in vertical wells. The method combines and improves two existing approaches. For detection and localization purposes the method makes use of the generalized beam-forming and forward modeling properties defined in the "CMM" algorithm. For location refinement, the method uses a stabilized version of the generalized "Geiger" approach.