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Rapid subsidence over oil fields measured by SAR

Show simple item record Fielding, E. J. en_US Blom, R. G. en_US Goldstein, R. M. en_US 2004-09-24T20:41:55Z 2004-09-24T20:41:55Z 1998-09 en_US
dc.identifier.citation Geophysical research letters, vol. 25, no. 17, pp 3215-3218 en_US
dc.identifier.clearanceno 98-0651 en_US
dc.description.abstract The Lost Hills and Belridge oil felds are in the San Joaquin Valley, California. The major oil reservoir is high porosity and low permeability diatomite. Extraction of large volumes from shallow depths causes reduction in pore pressure and subsequent compaction, forming a surface subsidence bowl. We measure this subsidence from space using interferometric analysis of SAR (Synthetic Aperture Radar) data collected by the European Space Agency Remote Sensing Satellites (ERS-1 and ERS-2). Maximum subsidence rates are as high as 40 mm in 35 days or > 400 mm/yr, measured from interferograms with time separations ranging from one day to 26 months. The 8- and 26-month interferograms contain areas where the subsidence gradient exceeds the measurement possible with ERS SAR, but shows increased detail in areas of less rapid subsidence. Synoptic mapping of subsidence distribution from satellite data powerfully complements ground-based techniques, permits measurements where access is difficult, and aids identification of underlying causes. en_US
dc.format.extent 353059 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other synthetic aperture radar remote sensing oil fields en_US
dc.title Rapid subsidence over oil fields measured by SAR en_US

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