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Rapid subsidence over oil fields measured by SARThe 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.
Document ID
20060041245
Acquisition Source
Jet Propulsion Laboratory
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fielding, E. J.
Blom, R. G.
Goldstein, R. M.
Date Acquired
August 23, 2013
Publication Date
September 1, 1998
Publication Information
Publication: Geophysical Research Letters
Volume: 25
Issue: 17
Subject Category
Earth Resources And Remote Sensing
Distribution Limits
Public
Copyright
Other
Keywords
synthetic aperture radar remote sensing oil fields

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