CPC E21B 49/00 (2013.01) [E21B 7/04 (2013.01); E21B 47/013 (2020.05); E21B 47/0228 (2020.05); E21B 47/13 (2020.05); G01V 3/30 (2013.01)] | 20 Claims |
1. A method of drilling a wellbore through an earth formation, comprising:
disposing a first antenna at a first location of a drill string;
disposing a second antenna at a second location of the drill string, wherein the first antenna has a first specific moment smaller than a second specific moment of the second antenna;
operating one of the first antenna and the second antenna as a transmitter to transmit a transmitted signal; and
operating the other of the first antenna and the second antenna as a receiver to receive a received signal in response to the transmitted signal;
determining a property of the earth formation from the received signal.
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