Summary
Microseismic surveys typically involve surface deployments, wellbore arrays or a combination of the two. Surface microseismic surveys are often very resource intensive due to their large apertures and receiver count. On the other hand, downhole arrays are often deployed within existing wells in the field which leads to constrained design apertures and failure of imaging algorithms traditionally used with surface deployments for characterizing the observed microseismicity. At the same time, hypocentral inversion algorithms used with wellbore arrays have many well understood limitations and their use leads to many valid events being discarded. We introduce a simple emission mapping approach which can be applied on microseismic data from either borehole or surface arrays and provides a temporal energy emission profile as observed during treatment. We share an actual field example and demonstrate the applicability of this attribute for better understanding of reservoir behavior during hydraulic fracturing and validate the analysis through independent observations from production log data.
