Study On Transient Electromagnetic Resistivity Measurement And Calibration Technology

With the rapid development of social economy, our country faces the problem of theenergy demand is more and more serious. And coal, oil and gas reserves is very considerablein our country. To strengthen energy and mineral resources exploration, improve the ability ofenergy and resources security, development of electromagnetic detection technology of oil andgas mineral resources is imminent. In this paper, transient electromagnetic method (TEM) areused in the exploration of mineral resources.This method is separable in space and time, aswell as the detection depth is larger, the low resistance layer strong penetrating power andsimple and informative, and in regard to the development of oil and gas and coal will havebroad prospect of application.In this paper, on the basis of the transient electromagnetic method, the transientelectromagnetic detonator bridge wire resistance detection technology and interwell remainingoil detection technology are analyzed and studied. Respectively on the basis of predecessors’research results of magnetic dipole, electric dipole in the space and half space uniformformation of electromagnetic response expressions deduced the calculation and simulation.The calculation of transient electromagnetic resistivity is studied.In addition, on the basis of the theory of transient electromagnetic method resistivitytesting, transient electromagnetic method resistivity test system was designed and developedin this paper. The same set of hardware system, which can realize the detonator bridge wireresistance and crosswell formation resistivity testing through different detection probeconfiguration. At the same time this paper also to the noise of the measurement of transientelectromagnetic data processing are studied, and write the corresponding computer displayprocessing software.Finally, the function of the function of the hardware circuit of the whole system wasdebugged in this paper. We did the detonator bridge wire resistance test equipment calibrationexperiment and interwell remaining oil line source simulation experiment after the softwareand hardware of system can be connected together. We made a lot of experimental data, andthe test results are analyzed. The experimental results show that the detonator bridge wireresistance detection device can accurately detect the detonator bridge wire resistance being measured, has good measuring precision; Using casing line source for interwell remaining oildetection method has achieved the expected results, which provides a large number of theoryand data support for the method of further experiment and performance analysis andimprovement of instrument.