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Deposition numerical-value simulation method of fine-grain sediments

A numerical simulation and sediment technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of many human factors and the inability to judge the distribution characteristics and deviations of fine-grained sediment deposits in detail

Inactive Publication Date: 2018-01-19
YANGTZE UNIVERSITY
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Problems solved by technology

[0002] In previous studies, the sedimentation process of fine-grained sediments was carried out in a laboratory, such as a holographic device, but it can only measure a limited number of particles, and these particles must be large in size (> 15μm)
Moreover, what is observed in the laboratory often has too many human factors, and the error is also large, which often deviates from the actual settlement process, and it is impossible to distinguish in detail what kind of action the fine-grained sediment has undergone to deposit, and it cannot be detailed Judging the depositional distribution characteristics of fine-grained sediments under a certain sedimentation

Method used

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  • Deposition numerical-value simulation method of fine-grain sediments
  • Deposition numerical-value simulation method of fine-grain sediments
  • Deposition numerical-value simulation method of fine-grain sediments

Examples

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Embodiment 1

[0071] Such as figure 1 Shown: a numerical simulation method for deposition of fine-grained sediments, including the following steps:

[0072] 1) According to the data of the study area, grid the study area to construct a hydrodynamic model;

[0073] 2) Starting from the depositional dynamics characteristics of sedimentary fine-grained sedimentary rocks, carry out sedimentological investigation and research, and conduct dynamic simulations of different depositional environments to determine the geological structure characteristics of sedimentary fine-grained sedimentary rocks in the study area and the physical mechanism of fine-grained sedimentary rock formation. Conditions; its specific methods:

[0074] a. According to the parallel finite element algorithm of the Navier-Stocks equation to simulate the salinity distribution and ion component distribution in the study area, compare and analyze the salinity and ion component distribution data with the geological data, adjust t...

Embodiment 2

[0112] A method for numerical simulation of deposition of fine-grained sediments, the method of the present embodiment is basically the same as that of Example 1, except for step 3) and step 5), as follows:

[0113] 3) On the basis of step 2), according to the geological structure characteristics of sedimentary fine-grained sedimentary rocks and the physical conditions for the formation of fine-grained sedimentary rocks, the depositional methods of fine-grained sediments are divided into gravity mode deposition and flocculation mode deposition; according to the following differences Deposition mode, calculate the sedimentation rate v of fine-grained sediments in different deposition modes;

[0114] When the fine-grained sediment is deposited by gravity, for the sedimentary rock formed in the process of gravity settlement, on the basis of the dynamic simulation of the depositional environment in step 2), according to the gravity formula, calculate the sedimentation rate of the f...

Embodiment 3

[0144] A deposition numerical simulation method of fine-grained sediments, the method of the present embodiment is basically the same as that of embodiment 3, the difference being step 3), specifically as follows:

[0145] 3) On the basis of step 2), according to the geological structure characteristics of deposited fine-grained sedimentary rocks and the physical conditions for the formation of fine-grained sedimentary rocks, the deposition methods of fine-grained sediments are divided into three categories, namely, gravity deposition and flocculation deposition Suspended with fine-grained sediments and then deposited; according to different deposition methods, calculate the sedimentation rate v of fine-grained sediments in different deposition methods;

[0146] When the fine-grained sediment is deposited by gravity, for the sedimentary rock formed in the process of gravity settlement, on the basis of the dynamic simulation of the depositional environment in step 2), according ...

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Abstract

The invention discloses a deposition numerical-value simulation method of fine-grain sediments. According to the method, fine-grain sediment settlement rates v of different deposition modes are calculated according to the different deposition modes; denudation amount m<denudation> of the sediments is calculated through a denudation formula, and the deposition settlement rates v and the denudationamount m<denudation> of the sediments are used to calculate and obtain mass m<deposition> of the sediments of the different deposition modes; The mass m<deposition> of the sediments of the different deposition modes is used to carry out summation calculation to obtain total deposition amount m <total> of the sediments; and volume of the sediments is calculated according to a rock density formula,deposition thickness of the sediments is calculated according to a grid area size and thickness formula, the deposition thickness is superimposed onto an initial bed form to obtain changes of the deposition bed form until simulation ends, thus realizing quantitative characterization for a study area, and realizing numerical-value simulation for the fine-grain sediments. According to the method, deposition processes of fine-grain deposition are clarified, various processes of fine-grain deposition are fully considered, and simulation requirements of fine-grain deposition are satisfied.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a deposition numerical simulation method of fine-grained sediments. Background technique [0002] In previous studies, the sedimentation process of fine-grained sediments was carried out in the laboratory, such as a holographic device, but it can only measure a limited number of particles, and these particles must be large in size (> 15 μm). Moreover, what is observed in the laboratory often has too many human factors, and the error is also large, which often deviates from the actual settlement process, and it is impossible to distinguish in detail what kind of action the fine-grained sediment has undergone to deposit, and it is impossible to detail Judging the sedimentary distribution characteristics of fine-grained sediments under a certain sedimentation. Contents of the invention [0003] The purpose of the present invention is to provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 崔智博尹太举候国伟张昌民宋亚开
Owner YANGTZE UNIVERSITY
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