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Abstract

A Saudi Arabian oil field was monitored during 28 days using three different networks of receivers: a digital wireline array set close to the reservoir depth, a permanent analogue array set at mid-depth and a dense surface array. A total of 267 receivers monitored the area when three 4-day injection tests occurred. About 9,500 microseisms were recorded. Recorded and picked microseisms ranging from magnitude -2.2 to 1.1 and were separately located using the different networks. The locations were consistent despite their uncertainties, especially in shape. The location using all networks strongly improved the location thanks to the monitoring coverage. However, this was only possible for 1% of the detected events because it required phase-picking on surface and a signal-to-noise ratio higher than one.

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/content/papers/10.3997/2214-4609.20146754
2009-03-22
2024-03-28
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20146754
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