Abstract: A method for measuring formation conductivity distribution based on transient electromagnetic eddy current field is provided. The method includes arranging a transmitter coil and a first array receiver coil to a target stratum of a transmitter well, arranging a second array receiver coil to a target stratum of a receiver well, periodically turning on and off the transmitter coil, moving the transmitter coil and the first array receiver coil for a first preset distance, acquiring a first eddy current signal of the first array receiver coil and a second eddy current signal of the second array receiver coil in a moving process of the first preset distance, moving the second array receiver coil for a second preset distance, moving the transmitter coil and the first array receiver coil for the first preset distance till the measurement of the whole well segments is completed, and obtaining formation conductivity distribution.

Abstract: The present invention discloses an oil-displacing system and method. The system includes a power supply, a control switch, a controller and a transient electromagnetic generator. The power supply is connected to the transient electromagnetic generator, the control switch is disposed in a connection path between the power supply and the transient electromagnetic generator, and a control end of the control switch is connected to the controller. The controller is configured for controlling the closing and opening of the control switch, thereby controlling the connection and closing of the connection path between the power supply and the transient electromagnetic generator. The transient electromagnetic generator is disposed in an oil well casing at a position in an oil formation, for generating a transient electromagnetic field according to the connection and closing of the connection path between the power supply and the transient electromagnetic generator.