Patent ID: 8901931
Filing Date: 2014-12-02
Classification: G01V,Y02A

Abstract:
1. A method, comprising: a. positioning a series of electromagnetic (EM) receivers in a completed deviated wellbore, said receivers being spaced along substantially the length of the well located in a region of a reservoir to be monitored; b. positioning an electromagnetic (EM) source at a first Earth surface location; c. activating the EM source for a first survey measurement of the reservoir; d. recording an EM field detected at each EM receiver; e. moving the EM source to a second Earth surface location; f. activating the EM source for a second survey measurement of the reservoir; g. recording an EM field detected at each EM receiver; and h. from the first and second survey measurements at each of the receivers, performing an inversion to determine position of water about the horizontal well.