Ground natural potential data acquisition processing method based on minor cycle plane multipolar synchronous base point

Abstract

The invention discloses a ground spontaneous potential data acquiring and processing method based on a small circulation plane multi-electrode synchronization base point. The method comprises the following steps that: a position which has smooth terrain and smaller human interference is selected near a work area to preset a base point, electrodes are arranged by a method that a deep-layer electrode and a shallow-layer electrode are longitudinally arranged; two adjacent measuring lines are divided into a plurality of sections according to the situation of the work area, a plurality of small cycles are formed at a certain section; general measuring point electrodes are arranged on a plane, each measuring point is provided with five electrodes; and a digital multi-channel observation instrument is utilized to synchronously observe a spontaneous potential time sequence of the five electrodes, a spontaneous potential time sequence of the base point is utilized to correct the spontaneous potential time sequences of general measuring points, five spontaneous potential values of each general measuring point can form gradients in three directions and obtain ten gradient values, thereby effectively reducing or partially eliminating the interference of various noises to obtain a reliable and steady spontaneous electric field.

Description

Data acquisition and processing method of ground spontaneous potential based on multi-pole synchronization base point of small circular plane technical field The invention relates to a geophysical exploration method, in particular to a method for collecting and processing ground natural potential data based on a multi-pole synchronization base point of a small circulation plane, which can improve the accuracy and quality of ground natural potential exploration. Background technique Under natural conditions, there is no need to supply power to the underground, and a certain magnitude of potential difference can usually be observed between two points on the ground, which indicates that there is a natural current field underground, referred to as a natural electric field. A passive source electrical exploration method for prospecting, mapping, hydrogeology and oil and gas exploration by using the spontaneous potential generated by the electrochemical action of rocks and ores i...

AI Technical Summary

Problems solved by technology

Only observe along the direction of the survey line, without considering the base point problem and the rapid closure of the observation to suppress the change of the natural electric field and electrode range over time. In addition, only one value is randomly measured between each pair of electrodes, which is prone to random interference Impact

The above-mentioned observation methods often have poor observation repeatability, extremely poor drift is difficult to control, and the influence of time-varying changes is not recorded, and only the gradient along the survey line is observed. The data cannot be monitored in real time during data collection, and the quality of the data cannot be guaranteed.

In the end, it affected the processing and interpretation in the room, and made it difficult to distinguish the true from the false of the spontaneous potential abnormality

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