Abstract
It is of great significance to quickly obtain the sedimentary characteristics of sandstone type uranium reservoir for guiding prospecting sandstone type uranium deposits. In order to solve this problem, a method based on the extraction and optimization of 3D seismic attributes is proposed. The target stratum of the uranium reservoir is accurately located by using the gamma and acoustic logging data together. The well seismic calibration for the uranium reservoir is carried out by making full use of the logging and seismic data. The high-density fine horizon tracking is implemented for the top, bottom, and obvious adjacent interfaces of the target stratum. Various seismic attributes along the target interface are extracted using stratigraphic slices. Analyzing the consistency between the results obtained by various seismic attributes and drilling data, the one that can best characterize the sedimentary characteristics of the target uranium reservoir is selected as the optimal seismic attribute. The sedimentary and its evolutionary characteristics of the target uranium reservoir are obtained by extracting the above optimal seismic attribute. A case study shows that we can obtain the 3D sedimentary characteristics of the target uranium reservoir fast and efficiently using the method based on the 3D seismic attribute. They can be used for providing important reference information for the exploration of sandstone type uranium deposits.
Highlights
Background and WorkflowThe sandstone-type uranium deposits, oil, and gas are all accumulated in the clastic rock stratum of the sedimentary basin
In order to describe the undulations of the interface for the target uranium reservoir stratum more precisely and ensure the accuracy of the stratigraphic slices as much graphic slices as much as possible, the high-density tracking method should be used when we do horizon tracking in the 3D seismic data
This study finds that the stratigraphic slice of the 3D seismic attribute is an effective tool for acquiring the sedimentary characteristics of the uranium reservoir
Summary
As a strategic clean energy source, sandstone-type uranium deposit is of great significance to the utilization of nuclear energy in the world [1,2,3]. We use the method based on the extraction and optimization of 3D seismic attributes to study the 3D sedimentary characteristics of sandstone type uranium deposits in this paper. The method for getting the sedimentary characteristics of sandstone type uranium deposits based on 3D seismic data was mentioned. The basic theories and methods of sedimentary seismology based on a seismic attribute in the oil and gas field are introduced and revised to analyze the sedimentary characteristics of sandstone-type uranium deposits in this paper. There are some different research contents comparing with the sedimentary seismology of the oil and gas field, such as locating and calibrating of uranium anomaly, extracting the seismic stratigraphic slices carefully in a thin stratum for a uranium reservoir and the sedimentary evolution of a uranium reservoir. A 3D field dataset example is introduced to verify the feasibility of our method
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