Multi-coil array for long-distance cross-well electromagnetic detection

Cross-well electromagnetic detection technology is an important geophysical exploration method, which is widely used in oil and gas development, underground resource acquisition and engineering environmental geophysical prospecting. At present, some scholars have developed relatively mature cross-well electromagnetic logging tools that can realize long-distance oil and gas logging. However, these tools are bulky and complicated to operate, so they are not suitable for small-diameter wells. Therefore, this paper proposes a multi-coil array probe for cross-well electromagnetic to realize the long-distance detection of small-diameter wells. The probe is mainly composed of the transmitter coil and the receiver coil. It is small in size, easy to carry, and can achieve high-power transmission and high-sensitivity reception. According to simulation and experimental results, the research can achieve long-distance detection up to 300 meters.