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A method for predicting uranium reservoirs in ancient valleys using old seismic data

A technology for seismic data and reservoir prediction, applied in the field of uranium ore exploration, can solve the problems of high investment cost, difficulty in prediction of paleo-valley uranium reservoirs, long period, etc., achieve accurate drilling verification, save drilling costs, and improve accuracy Effect

Active Publication Date: 2022-07-26
核工业二0八大队
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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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  • A method for predicting uranium reservoirs in ancient valleys using old seismic data
  • A method for predicting uranium reservoirs in ancient valleys using old seismic data
  • A method for predicting uranium reservoirs in ancient valleys using old seismic data

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Embodiment Construction

[0027] A method for predicting paleovalley-type uranium reservoirs using old seismic data according to the present invention will be further described below with reference to the accompanying drawings and specific examples. The specific implementation process is as follows. figure 1 .

[0028] 1. Using the known geological drilling data of uranium deposits, determine the properties of uranium reservoirs by technical methods such as structural criteria, uranium source criteria, lithology-lithofacies criteria, and petrochemical criteria;

[0029] 2. Combined with the two-dimensional seismic profiles of petroleum, the predecessors' seismic data were processed with fidelity and amplitude, and the shallow seismic reflection information was highlighted. The seismic facies of the ancient valleys of the seismic profiles of the known uranium mine holes were analyzed. According to the known well-wave impedance and seismic wave Analysis, conduct wave impedance inversion, realize shallow ...

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Abstract

The invention belongs to the technical field of uranium ore exploration, and particularly relates to a method for predicting uranium reservoirs in ancient river valleys by using old seismic data. At present, the main prospecting method and method is drilling, but the input cost is high and the cycle is long, and it is difficult to predict uranium reservoirs in ancient river valleys by traditional methods. The present invention mainly includes: step 1: using known geological drilling data of uranium deposits, through structural criterion, uranium source criterion, lithology-lithofacies criterion and rock geochemistry criterion, to determine the properties of uranium reservoir; step 2: combining petroleum 2 Dimensional seismic profile, processing the predecessor seismic data with fidelity and amplitude preservation, highlighting the shallow seismic reflection information, analyzing the seismic facies of the ancient valley of the seismic profile of the known uranium mine hole, and carrying out the wave impedance according to the known well wave impedance and seismic wave analysis. Inversion, realize shallow interpretation and structural identification of petroleum seismic profiles, and determine the properties of uranium reservoirs; Step 3: Combine verification. This method can be used to predict uranium reservoirs in ancient river valleys.

Description

technical field [0001] The invention belongs to the technical field of uranium ore exploration, and particularly relates to a method for predicting uranium reservoirs in ancient river valleys by using old seismic data. Background technique [0002] Sedimentary basins are often "treasure basins" rich in various energy resources. They not only contain abundant coal and oil and gas resources, but also have a large number of uranium resources. In-situ leachable sandstone-type uranium deposits in the north are the focus of uranium prospecting work in my country. Such uranium deposits are mainly deeply buried blind ore bodies, with basically no outcrops. At present, the main prospecting method and method is drilling, but investment Due to the high cost and long period, traditional methods are difficult to predict uranium reservoirs in ancient river valleys. [0003] This method uses reflection characteristics on old seismic sections, wave impedance and seismic wave analysis, and w...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30G01V1/36
CPCG01V1/282G01V1/306G01V1/364G01V2210/163G01V2210/324G01V2210/6226
Inventor 张良彭云彪鲁超田娟周晓光
Owner 核工业二0八大队
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