Gradient geochemical exploration method

Abstract

The invention discloses a method for acquiring and processing gradient geochemical exploration data. A soil sample and an air sample are acquired intensively in a certain depth range of a superficial layer in a longitudinal direction, and soil samples and air samples with the depth of one to ten meters (metal exploration) or one to fifty meters (oil exploration) are sampled by a special drilling machine in a staggered way; and sounding curves with various indexes, a gradient curve, and a profile curve, and a gradient profile curve, an isoline section and a gradient isoline section in a certain direction are extracted and drawn through the conventional geochemical index analysis and the conventional processing, so three-dimensional data processing and graphical representation can be realized, and information, particularly longitudinal change information, which is more abundant than the conventional geochemical exploration information, can be obtained. Samples are sampled along the depth, so a method that geochemical exploration indexes change along with depth, and gradient exploration is realized.

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

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