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Benchmark of Surface Microseismic Monitoring at Peace River, CanadaNormal access

Authors: S. Grandi Karam, S. Oates and S. Bourne
Event name: Third EAGE Passive Seismic Workshop - Actively Passive 2011
Session: Monitoring II
Publication date: 27 March 2011
DOI: 10.3997/2214-4609.20145302
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 389.58Kb )
Price: € 20

Summary:
We acquired at Peace River a suite of geophysical data including 3 months of passive seismic. A surface array of buried multi-component receivers covering an area of about 2Km^2 listened to the recovery activity, which is driven by steam injection at a depth around 550m below the surface, with the intention of detecting induced microseismic events. To support this information, a series of string shots were detonated in a well near the center of the survey area and recorded by the same receiver array. We benchmarked the localization results of two service companies against an in-house quality control processing based on a cross-correlation migration approach. From the analysis, we found that: (1) the minimum detectable moment magnitude by the surface array seems to be around –1.6; (2) the catalogues provided by the service companies differ greatly, and contain a significant number of events that appear not to be associated with the activity ongoing at the reservoir; (3) the events categorized as microseisms are located near the heel of a well that was injecting steam at the time of the survey; (4) the differences in location of string shots and microseismic events between our and the companies’ processing are less than 100m.


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