Patent ID: 7046581
Filing Date: 2006-05-16
Classification: G01V

Abstract:
1. A method of obtaining a spatial model of a property of part of a subsurface formation located between underground spaced-apart seismic receivers, said method comprising the steps of: (a) positioning in a borehole a first set of seismic receivers and positioning in a borehole a second set of seismic receivers; (b) selecting at least one pair of seismic receivers, wherein each pair of seismic receivers consists of a seismic receiver i of the first set and a seismic receiver j of the second set; (c) recording for the pair(s) of seismic receivers i and j signals s (d) obtaining for each of the pair(s) a transmission response r (e) selecting a path-related attribute of the transmission response r (f) applying a tomographic reconstruction technique to the path-related attribute of the transmission response(s) r