CPC E21B 47/0228 (2020.05) [G01V 3/28 (2013.01); E21B 43/2406 (2013.01)] | 20 Claims |
1. A method for determining a position of a wellbore, comprising:
inducing a first current to form a first magnetic field with a first source in a first conductive member disposed at a first location in Earth's surface, wherein the first location comprises a first distance from the wellbore and a first direction from the wellbore;
inducing a second current to form a second magnetic field with a second source in a second conductive member disposed at a second location in the Earth's surface, wherein the second location comprises a second distance from the wellbore and a second direction from the wellbore, and wherein the first location and the second location are not the same location;
inducing a third current into the first conductive member and the second conductive member at the same time with a third source by connecting the third source to both the first conductive member and the second conductive member;
emitting a third magnetic field into the formation;
disposing an electromagnetic sensor system into the wellbore, wherein the electromagnetic sensor system comprises one or more sensors;
recording the first magnetic field from the formation with the one or more sensors;
recording the second magnetic field from the formation with the one or more sensors; and
recording the third magnetic field from the formation with the one or more sensors.
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