| http://www.w3.org/ns/prov#value | - for identifying subsurface fluid migration and drainage pathways in and among oil and gas reservoirs using 3-D and 4-D seismic imagingUS5642051Nov 17, 1994Jun 24, 1997Schlumberger Technology CorporationMethod and apparatus for surveying and monitoring a reservoir penetrated by a well including fixing electrodes hydraulically isolated within a wellUS5706896 *Feb 9, 1995Jan 13, 1998Baker Hughes Inc
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