2 results about "Induction logging" patented technology

The present application belongs to the technical field of induction logging data processing, and discloses an induction logging iterative borehole correction method and device. The data of n sub-arrays under different hole diameters and borehole influence factors are fitted to determine a first formula of the borehole influence factors and the first ratio of the n sub-arrays under different hole diameters. According to the first formula, the coefficients a, b and c of different sub-arrays under different hole diameters are determined. A given initial formation apparent conductivity value is used to calculate the borehole influence factor according to the first formula. The borehole influence factor is brought into a second formula to calculate the formation apparent conductivity. The formation apparent conductivity is brought into the first formula to calculate the borehole influence factor, and the result is brought into the second formula for iterative calculation to obtain the formation conductivity response value not affected by the borehole mud. The present application can be applied in induction logging data inversion and does not have the inversion process, and can obtain the formation conductivity response value not affected by the borehole mud.

This invention belongs to the field of oil and gas exploration and development technology, and discloses an induction logging tool transmission drive module and driving method. The drive module includes a MOS full-bridge chip U1 mounted on a substrate. One end of the GND wire is connected to the common ground pin and the heat dissipation pad pin, and the other end of the GND wire is connected to the negative power supply. The two ends of the IN2 wire are connected to the second input pin and the controller, respectively. The two ends of the IN1 wire are connected to the first input pin and the controller, respectively. The two ends of the VCC wire are connected to the voltage monitoring pin and the positive power supply, respectively. The first output pin is connected to one end of the transmission coil, and the second output pin is connected to the other end of the transmission coil. This invention's drive module, through the MOS full-bridge chip U1, can be used in various scenarios with selected components. It requires fewer discrete components, reducing its size to less than 1 / 10 of the original, and can be installed in confined spaces.