Delineation method for paleochannel type sandstone uranium reservoir

A channel and sandstone technology, applied in the delineation of paleochannel-type sandstone uranium reservoirs, can solve problems such as low prediction accuracy

Pending Publication Date: 2021-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a delineation method of paleochannel typ

Method used

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  • Delineation method for paleochannel type sandstone uranium reservoir
  • Delineation method for paleochannel type sandstone uranium reservoir
  • Delineation method for paleochannel type sandstone uranium reservoir

Examples

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Embodiment 1

[0033] The delineation method of paleochannel-type sandstone uranium reservoirs proposed in this example is illustrated by taking Basin A in China as an example, as follows figure 1 shown, including the following steps:

[0034] 1) Obtain seismic data, well logging data, core data, and industrial uranium mine drilling data of the target area (that is, a certain work area), and complete data preparation; well logging data and core data are data that have been drilled, and industrial uranium mine drilling data The data are drill holes from known industrial uranium deposits.

[0035] 2) The seismic data obtained in step 1) are processed with fidelity and amplitude, and the seismic reflection information of the shallow layer (including the uranium target layer) is highlighted, and the following is obtained: figure 2 Shown is a shallow interpretation of a 2D seismic section (ie, processed seismic data) that meets data quality requirements. Load the processed seismic data; use th...

Embodiment 2

[0059] The difference between the delineation method of paleochannel-type sandstone uranium reservoir proposed in this embodiment and the first embodiment is that this embodiment does not process the seismic data with fidelity and amplitude, and the rest of the method process is the same as that of the first embodiment, which will not be done here repeat.

[0060] like Image 6 as shown, Image 6 When using the delineation method of the present invention to predict the paleochannel uranium reservoir, the comparison chart of the prediction results before and after the seismic data is processed with fidelity and amplitude preservation, the old line is the prediction result without fidelity and amplitude preservation processing, and the new processing is the prediction result after the preservation of fidelity and amplitude preservation. Prediction results of seismic data processed with true amplitude, taking the paleochannel confirmed by well drilling as an example: in Image ...

Embodiment 3

[0062] The difference between the delineation method of the paleochannel type sandstone uranium reservoir proposed in this embodiment and the first embodiment is that in the first embodiment, steps 2) and 3) are performed first, and then step 4) is performed. In this embodiment, Step 4) is performed first, and then steps 2) and 3) are performed, and the rest of the method process is the same as that of Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to a delineation method for a paleochannel type sandstone uranium reservoir, and belongs to the technical field of uranium exploration. The method comprises the steps of acquiring logging data, core data, seismic data and industrial uranium mine drilling data of a target area; synthesizing the logging data and the seismic data into a seismic record, calibrating a target stratum of the uranium-containing mine, and completing seismic interpretation of the target stratum; delineating a structural slope zone in the seismic interpretation result of the target stratum; delineating an oxidation-reduction transition zone according to the core data of the target stratum; in the delineated structure slope zone, taking the part overlapped with the oxidation-reduction transition zone as a prospective zone; identifying a uranium mine favorable area in the prospective zone according to the industrial uranium mine drilling data; and carrying out wave impedance inversion on the uranium mine favorable zone, and accurately delineating a uranium reservoir in the uranium mine favorable zone. According to the method, the logging data, the core data, the seismic data and the industrial uranium mine drilling data are effectively combined to predict the uranium reservoir, and the prediction result is accurate.

Description

technical field [0001] The invention relates to a method for delineating paleochannel type sandstone uranium reservoirs, belonging to the technical field of uranium ore exploration. 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. Sandstone-type uranium ore is a nuclear energy mineral that occurs in sedimentary basins. It is the groundwater rich in U (6 valence) that migrates in the sandstone to the edge of the interlayer oxidation zone and precipitates by reduction or adsorption. The ore body formed by the enrichment of U (4 valence). Sandstone-type uranium deposits can be divided into sedimentary diagenetic type, interlayer oxidation zone type, paleochannel type and later hydrothermal transformation type according to sedimentary facies and deposit genesis. Paleochannel sandstone-type uranium deposits a...

Claims

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Application Information

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IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 刘光蕊鲁超张良蔡其新汪功怀周晓光欧阳睿万晓兵
Owner CHINA PETROLEUM & CHEM CORP
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