Method for obtaining spatial distribution positions of uranium anomalies in sand body by using well-seismic combination method

Abstract

The invention relates to a method for obtaining three-dimensional distribution positions of uranium anomalies in a sand body through a well-seismic combination method. The method comprises the following steps: reading three-dimensional earthquake, drilling and logging data; calibrating a uranium abnormal target layer section and a fine well earthquake; carrying out well data rock physical sensitivity analysis of a uranium anomaly target layer section, fine structure interpretation and inversion initial model establishment of the uranium anomaly target layer section, high-resolution three-dimensional well seismic sand body inversion and precision evaluation of the uranium anomaly target layer section, rapidly obtaining the corresponding relation between uranium anomaly and sand body space by superposing a gamma logging curve and a three-dimensional inversion data body and the like. The specific distribution of uranium anomalies in a sand body is solved, and a reliable drill distributionbasis is provided for detailed exploration. Compared with an analysis method only based on drilling data, the method provided by the invention can obtain a well-to-seismic combination method including rock physical sensitivity analysis and precision evaluation, and has better pertinence, reliability and precision guarantee. A large amount of drilling workload is greatly reduced, the working efficiency of detailed survey is improved, and the field working cost is greatly reduced.

Description

technical field [0001] The invention relates to a method for quickly obtaining the three-dimensional spatial correspondence of uranium anomalies in sand bodies based on three-dimensional well-seismic joint analysis, in particular to a method for obtaining spatial distribution positions of uranium anomalies in sand bodies by using a combined well-seismic method. Background technique [0002] Sandstone-type uranium ore is a new type of resource that has important strategic significance for national nuclear energy and national defense security, and can be mined cleanly at low cost by in-situ leaching. "Acta Sedimentum Sinica" published Jiao Yangquan et al.'s "Origin Analysis of the Sandbody at the Bottom of the Zhiluo Formation in the Northeast of the Ordos Basin—Spatial Location Basis for Prediction of Sandstone-type Uranium Deposits" by Jiao Yangquan et al. in 2005. The channel is also the storage space for uranium mineralization. The study of the spatial correspondence betwe...

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Problems solved by technology

[0008] The purpose of the present invention is to aim at the low efficiency of the section method and plane method based on drilling data statistics in the above-mentioned prior art, interwell interpolation or speculation is required, only one plane or local spatial correspondence can be obtained, and it is difficult to obtain full three-dimensional spatial correspondence, etc. To solve the problem, provide a method to obtain the spatial distribution position of uranium anomalies in sand bodies by using the combined well-seismic method

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