Gradient geochemical exploration method

Abstract

A method for geochemical gradient exploration includes the steps of: densely collecting soil samples and gas samples along a longitudinal direction in a certain depth range of a superficial layer; collecting soil samples and gas samples in the range from 1 meter to 50 meters deep by a special drilling machine; after analyzing and processing the geochemical indicators, extracting and figuring the bathymetric curve and the curve of gradients, the section curve and section curve of gradient along a certain direction, contour section of various indicators and contour section of various indicator gradients, so as to process the data and to represent the figure in 3D. More information, especially the variation information along the longitudinal direction, can be obtained. Gradient prospecting is realized by collecting samples along the depth direction and by analyzing variations in geochemical indicators along the depth.

Description

technical field [0001] The invention relates to a method for collecting and processing geochemical prospecting data, which is a gradient geochemical prospecting method. Background technique [0002] At present, geochemical methods have been widely used in metal minerals, environmental monitoring, and oil and gas resource exploration. However, the traditional method of geochemical sample collection has always been used, that is, one sample is collected at a certain depth for each measuring point. There are several basic collection methods for soil samples: digging pits for sampling, impact drilling for sampling, and shallow well sampling. Gas samples are generally collected by drilling rigs Drill to a certain depth and take a gas sample with a vacuum needle. Mineral anomalies are found by analyzing soil samples or gas samples. This method of sample collection can only obtain the lateral change information of geochemical anomalies at a certain depth, and it is often difficult...

AI Technical Summary

Problems solved by technology

Mineral anomalies are found by analyzing soil samples or gas samples. This method of sample collection can only obtain the lateral change information of geochemical anomalies at a certain depth, and it is often difficult to satisfy exploration problems such as bedding sampling and contour sampling at the same time, so it cannot be used well. To study the change law of geochemical indicators under the condition of the same layer or the same depth, it is also impossible to understand the change of anomalies with depth

In particular, due to the obvious difference between the anomalies caused by modern human environmental pollution and the anomalies caused by the existence of underground metal minerals and oil and gas reservoirs, the former tends to weaken with increasing depth, while the latter will strengthen with increasing depth, so it is difficult to identify such anomalies with single data. Abnormal, so that wrong interpretations and inferences often occur in actual exploration, and the application effect is not good. The existence of these problems, the original method itself is difficult to solve completely, which affects the further development of the method

Images