A Method of Correcting the Influence of Non-infinity Power Supply Electrodes for IP Tripole Sounding in Time Domain

Abstract

Provided is a method for correcting the influence of a non-infinite power supply electrode in time-domain induced polarization three-pole sounding. As an infinite power supply electrode for time-domain induced polarization three-pole sounding adopts a non-infinite power supply electrode pattern due to terrain, signal intensity and other causes, there is a need to eliminate the influence of a non-infinite power supply electrode in apparent resistivity and apparent polarizability data of time-domain induced polarization three-pole sounding. Based on the situation, an infinite power supply electrode C is added to measure the influence parameters Rho(B) and Eta(B) of a non-infinite power supply electrode B on the apparent resistivity and apparent polarizability in time-domain induced polarization three-pole sounding data, and the apparent resistivity and apparent polarizability in measured time-domain induced polarization three-pole sounding data are corrected to get data reflecting the actual apparent resistivity and apparent polarizability of a measuring point. Therefore, the data accuracy and exploration effect of time-domain induced polarization three-pole sounding are improved, and the application range of time-domain induced polarization three-pole sounding in complex terrains is widened.

Description

technical field [0001] The invention relates to a method for correcting the influence of a non-infinity power supply electrode in the field of exploration geophysics in the time domain induced three-pole sounding. Background technique [0002] In the electrical exploration, the theoretical infinite power supply electrode is used in the time domain induced three-pole sounding device for exploration. According to the theoretical requirements, the infinite power supply electrode is set as B, the power supply electrode is A, and the middle point of the measuring point is O, then the distance from the power supply electrode B to the measuring point at infinity (L BO ) or not less than 5 times the distance from the power supply electrode A to the measuring point (L AO ), which satisfies the relation L BO ≥5L AO . However, in order to obtain the anomalies of resistivity and polarizability in mid-deep time-domain IP triode sounding, the distance from power supply electrode A to ...

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Problems solved by technology

Such limited conditions have brought great difficulties to the field three-pole electric sounding to arrange infinite power supply electrodes, and also increased the cost of exploration; in addition, the terrain of the three-pole sounding work is complex, the vegetation is developed, and the vertical survey line is arranged in the exploration area. It is difficult for remote power supply electrodes to meet the above distance requirements. When field conditions limit the arrangement of theoretically infinite power supply electrodes, either the exploration work cannot be carried out, or non-infinite power supply electrodes that do not meet the requirements of electrical exploration are arranged. At this time, the time domain IP triode sounding electrical exploration data includes the influence of non-infinity power supply electrodes. If the time domain IP triode sounding data is also calculated according to the calculation method of time domain IP triode sounding theory, then Due to the influence of non-infinity power supply electrodes in the time-domain IP triode sounding data, data distortion is formed, which affects the accuracy and effect of time-domain IP triode sounding sounding, so it is necessary to eliminate the time-domain IP triode sounding The impact of non-infinity power supply electrodes in deep exploration data can objectively reflect the apparent resistivity and apparent polarizability data under MN measurement electrodes, improve the accuracy and effect of exploration, and also improve the versatility and applicability of the method

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