Method for rapidly delineating position of paleo-interlayer oxidation front line in oil gas covering area

Abstract

The invention belongs to the technical field of sandstone type uranium mineralization potential evaluation and comprehensive prospecting in the basin, and specifically discloses a method for rapidly delineating the position of a paleo-interlayer oxidation front line in an oil gas covering area. The method includes (1) determining the paleo layer working area of the oil gas covering area and selecting a destination layer; (2) selecting n uranium deposits that are similar to the working area in the oil gas covering area in the previous step (1); (3) determining the similarity Si between the n uranium deposits and the working area in step (2); (4) determining the front line development rate Vi for the n uranium deposits in step (2); and (5) delineating the paleo oxidation front line of the working area. According to the method, the paleo-interlayer oxidation front line development position can be quickly and efficiently delineated, the prospecting efficiency is improved, and the prospecting cost is saved.

Description

technical field [0001] The invention belongs to the technical field of sandstone-type uranium mineralization potential evaluation and comprehensive prospecting in basins, and in particular relates to a method for quickly delineating the development position of an oxidation front line between paleolayers in a cover area of ​​an oil-gas basin. Background technique [0002] The theory of interlayer infiltration suggests that the uranium-containing oxygen-containing fluid at the basin edge migrates forward along the target layer, and as the oxygen in the interlayer water is continuously consumed, the hexavalent uranium will be reduced to Tetravalent uranium was precipitated and enriched, and continuously "rolled" forward to form a crescent-shaped ore body (Granger H.C. and Warren C.G., 1964, 1974; Shawe D.R. and Granger H.C., 1965; Shmaleovich E.M. and Maximova М.Ф., 1993). The ore bodies are usually located at the transitional part between the yellow epigenetic oxidized sand b...

AI Technical Summary

Problems solved by technology

However, in oil and gas-bearing basins, controlled by oil and gas exudation, the paleo-layer oxidation zone of the target layer is often covered by oil and gas in a large area, which makes it difficult to identify the paleo-oxidation front and brings great difficulties to ore prospecting (Zhao Ruiquan, 1999 ; Qin Mingkuan, 2000; Li Ziying, 2009)

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