Patent ID: 9612355
Date: 2017-04-04
CPC Classifications: G01V

Claim:
1. An apparatus comprising: a tool having electromagnetic sensors such that all electromagnetic sensors of the tool are structured as arrangeable and operable below earth's surface; a first arrangement of electromagnetic sensors of the tool arrangeable in and along a subterranean path which extends, at least in part, in a first direction; a second arrangement of electromagnetic sensors of the tool arrangeable in and along another subterranean path which extends, at least in part, in a second direction, the second direction being different from the first direction, the first arrangement and the second arrangement structured as arrangeable in different non-vertical branches of a common vertical well extending from the common vertical well or the first arrangement and the second arrangement structured as arrangeable with one of the first arrangement or the second arrangement structured in a non-vertical branch of the common vertical well extending from the common vertical well and the other one of the first arrangement or the second arrangement extending vertically within the common vertical well, and the first arrangement and the second arrangement being operable to receive a transmitted signal to acquire sensing and/or mapping information with respect to a subterranean reservoir; and a processing unit arranged to operate the first and second arrangements to choose a set of transmitting sensors and a set of receiving sensors from the electromagnetic sensors of the first and second arrangements such that a signal is received in the set of receiving sensors in one of the first or second arrangement in response to activation of the set of transmitting sensors in the other one of the first or second arrangement, wherein the electromagnetic sensors of the first arrangement have electric or magnetic dipoles arranged, when the first arrangement is disposed along the first subterranean path, to have a predetermined or selectable orientation and the electromagnetic sensors of the second arrangement have electric or magnetic dipoles arranged, when the second arrangement is disposed along the second subterranean path, to have the orientation of the electric or magnetic dipoles of the first arrangement.