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Single Well Seismic Imaging of a Gas-filled Hydrofracture

Roland GrittoThomas M. DaleyErnest L. Majer

出版	Lawrence Berkeley National Laboratory, 2003
URL	http://books.google.com.hk/books?id=fPzajwEACAAJ&hl=&source=gbs_api

註釋

A single well seismic survey was conducted at the Lost Hills, Ca oil field in a monitoring well as part of a CO2 injection test. The source was a piezoelectric seismic source and the sensors were a string of hydrophones hanging below the source. The survey was processed using standard CMP reflection seismology techniques. A potential reflection event was observed and interpreted as being caused by a near vertical hydrofracture. The radial distance between the survey well and the hydrofracture is estimated from Kirchoff migration using a velocity model derived from cross well seismic tomography. The hydrofracture location imaged after migration agrees with the location of an existing hydrofracture.