What Is Geophysical Prospecting?

Geophysical prospecting is referred to as geophysical exploration, which refers to the exploration of geological conditions such as formation lithology and geological structure by studying and observing changes in various geophysical fields. Because the different rock formation media that make up the crust often have differences in density, elasticity, electrical conductivity, magnetic properties, radioactivity, and thermal conductivity, these differences will cause local changes in the corresponding geophysical fields. By measuring the distribution and change characteristics of these physical fields, and combining analysis and research with known geological data, the purpose of inferring geological properties can be achieved. This method has both exploration and test functions. Compared with drilling, this method has the advantages of light equipment, low cost, high efficiency, and wide working space. But because it can not be sampled and cannot be directly observed, it is often used in conjunction with drilling.

Geophysical surveys are based on physical phenomena

Often used in geophysical exploration

Various geophysical methods near or near the surface

Introduction of modern electronic calculator technology

The main test content:

(1) Metal pipeline detection

Underground metal pipelines are suitable for detection with pipeline detectors and ground penetrating radars. Pipeline instruments have the advantages of high efficiency, light weight, and accurate results for detecting metal pipelines. Ground penetrating radars can be used to detect large buried depths and dense pipelines.

(2) Non-metallic pipeline detection

The preferred method for underground non-metallic pipeline detection is ground penetrating radar. GPR has the advantages of continuous non-destructive detection, high efficiency, high accuracy, and easy inversion interpretation.

The use of ground penetrating radar has unique antenna array technology, which can greatly improve the accuracy and effectiveness of the detection results.

Taking advantage of the differences in physical properties between the underground ancient relics and the surrounding matter, geophysical exploration methods were used to investigate their planar position, buried depth and distribution range. Using radar multi-antenna array technology, the detection accuracy is high, and it has unparalleled advantages in accurate positioning in a small area. Magnetic detection can reveal the appearance of underground sites faster and in a larger area. The recognized part can be corrected with typical image to get a more complete picture of the site.

It is mainly used to find out the location and distribution of Tucheng walls, trenches, pits, column holes, houses, tombs, etc. within the site. ^[1]