Method for predicting ancient valley uranium reservoir by using old seismic data

Abstract

The invention belongs to the technical field of uranium mine exploration and particularly relates to a method for predicting an ancient valley uranium reservoir by using old seismic data. At present,the main prospecting means and method are drilling, but investment cost is high, the period is long, and a traditional method is difficult to predict the ancient valley uranium reservoir. The method mainly comprises steps of step 1, determining uranium reservoir attributes by utilizing known uranium mine geological drilling data through a construction criterion, a uranium source criterion, a lithology-lithofacies criterion and a rock geochemistry criterion; 2, combining a petroleum two-dimensional seismic section, carrying out fidelity amplitude preservation processing of anterior seismic data, highlighting the shallow seismic reflection information, analyzing an ancient valley seismic facies of a seismic section passing through a known uranium mine hole, carrying out wave impedance inversion according to known well wave impedance and seismic wave spectrum analysis, realizing shallow interpretation and structure identification of a petroleum seismic section, and determining uranium reservoir attributes; and 3, performing combined verification. The method can be used for predicting the ancient valley uranium reservoir.

Description

technical field [0001] The invention belongs to the technical field of uranium ore exploration, and in particular relates to a method for predicting ancient valley uranium reservoirs by using old seismic data. Background technique [0002] Sedimentary basins are often "treasure basins" rich in various energy resources. They not only contain rich coal and oil and gas resources, but also have a large number of uranium resources. In-situ leachable sandstone-type uranium deposits in northern my country are the focus of uranium prospecting work in China. This kind of uranium deposits are mainly deep-buried blind ore bodies with basically no outcrops. At present, the main means and method of prospecting are drilling, but investment The cost is high and the period is long, and it is difficult to predict the uranium reservoir in the paleo-river valley by traditional methods. [0003] In the vast area without core or outcrop, this method uses the reflection characteristics on the old...

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Problems solved by technology

In-situ leachable sandstone-type uranium deposits in northern my country are the focus of uranium prospecting work in China. This kind of uranium deposits are mainly deep-buried blind ore bodies with basically no outcrops. At present, the main means and method of prospecting are drilling, but investment The cost is high and the cycle is long, and the traditional method is difficult to predict the uranium reservoir in the paleo-river valley

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