Schlumberger

Technical Paper: Statistical Evaluation for Comparative Microseismic Interpretation

Society: EAGE
Paper Number: D023
Presentation Date: 2012
 

Abstract

Microseismic monitoring is often used to evaluate differences in hydraulic fracturing, resulting from either changes in the stimulation or geologic setting. Often the various microseismic images of individual fracs are each separately interpreted for fracture geometry or activity rates, and then these absolute interpretations of the various fracs are compared. However, comparisons can be made between variations in specific fracture dimensions in each image, including using statistical tests to quantify significance of relative differences. Such a relative comparative interpretation is more robust and relies on a simpler assessment of the location uncertainty in contrast to the need to consider all aspects of location accuracy for absolute interpretations. Microseismic activity rates can also be compared to quantify the relative seismic deformation. The resulting comparative microseismic interpretation can be used as part of a comparative hydraulic fracture evaluation to test the response to different designs and ultimately optimize the stimulation.

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