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Sand body reorganization method in sandstone-type uranium deposit exploration

An identification method, sandstone-type technology, applied in the field of sandstone-type uranium ore exploration, can solve the problems of low accuracy, inconsistent identification features, and low identification accuracy

Active Publication Date: 2014-07-30
BEIJING RES INST OF URANIUM GEOLOGY
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AI Technical Summary

Problems solved by technology

Conventional geophysical electric (magnetic) prospecting methods have low recognition accuracy and cannot distinguish the interbedded conditions of sand and mudstone; the seismic facies feature recognition method in traditional seismic prospecting methods is greatly influenced by personal experience, and the recognition features are not uniform and accurate. degree is not high

Method used

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0028] A method for identifying sand bodies in sandstone-type uranium deposit exploration, the method comprising the following steps:

[0029] (1) Acquisition of pure wave data of a seismic processing section

[0030] Seismic field data are collected by seismographs, and static correction, denoising, amplitude compensation, deconvolution, dynamic correction stacking, and migration processing are performed sequentially on the seismic field data to obtain pure seismic wave data.

[0031] The above pure seismic wave data have not been filtered and dynamically balanced.

[0032] (2) Collect well logging data of wells near the seismic section, and calculate the abnormal contrast value of density and acoustic wave

[0033] Drilling near the seismic profile means that if the geological background of the study area is complex, the vertical distance ...

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Abstract

The invention belongs to the technical field of sandstone-type uranium deposit exploration, and particularly discloses a sand body reorganization method in sandstone-type uranium deposit exploration. The method includes the following steps that (1) pure wave data of a seismic processing section are collected; (2) logging data of a drilling well nearby the seismic section are collected, and the abnormal contrast value of density and the abnormal contrast value of sound waves are calculated; (3) moving average processing is conducted on density data and sound wave data; (4) a seismic inversion calculation initial model is established through the density data, the sound wave data and the logging data after moving average processing in the step (3); (5) inversion calculation is carried out on wave impedance data of the seismic section through an inversion method based on the model, and the wave impedance data of the seismic section are acquired; (6) sand bodies in a sandstone-type uranium deposit area are determined according to the wave impedance data acquired in the step (5). By means of the sand body reorganization method in sandstone-type uranium deposit exploration, the development condition and the distribution feature of the sand bodies in sandstone-type uranium deposit exploration can be recognized accurately, rapidly and economically.

Description

technical field [0001] The invention belongs to the technical field of sandstone-type uranium ore exploration, and in particular relates to a method capable of quickly and effectively identifying the development and distribution characteristics of sand bodies in sandstone-type uranium ore exploration. Background technique [0002] Sandstone-type uranium deposits are difficult to identify because of the small physical property differences between sand bodies and surrounding rocks. Conventional geophysical electric (magnetic) prospecting methods have low recognition accuracy and cannot distinguish the interbedded conditions of sand and mudstone; the seismic facies feature recognition method in traditional seismic prospecting methods is greatly influenced by personal experience, and the recognition features are not uniform and accurate. The degree is not high. Contents of the invention [0003] The purpose of the present invention is to provide a method for identifying sand ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 吴曲波李子伟潘自强徐贵来柯丹马娇
Owner BEIJING RES INST OF URANIUM GEOLOGY
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