Analysis and preparation method of artificial core for displacement experiment based on experiment and mathematical algorithm

An artificial core and mathematical algorithm technology, applied in neural learning methods, special data processing applications, biological neural network models, etc., can solve problems such as less research on qualitative and quantitative statistical analysis, achieve high simulation degree and reduce preparation. The number of failures and the effect of small errors in the simulated formation parameters

Active Publication Date: 2021-05-28
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Based on mathematical algorithms, there is little research on providing qualitative and quantitative statistical analysis for artificial core preparation

Method used

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  • Analysis and preparation method of artificial core for displacement experiment based on experiment and mathematical algorithm
  • Analysis and preparation method of artificial core for displacement experiment based on experiment and mathematical algorithm
  • Analysis and preparation method of artificial core for displacement experiment based on experiment and mathematical algorithm

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Experimental program
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Effect test

Embodiment

[0150] Example: A method for analysis and preparation of artificial cores for displacement experiments based on experiments and mathematical algorithms

[0151] Add aluminum phosphate cement to refined quartz sand with different particle sizes, and make standard test cores under certain pressure and temperature conditions. By changing the ratio of refined quartz sand with different particle sizes, different parameters such as porosity, permeability, and median particle size can be obtained.

[0152] (1) Preparation of experimental materials

[0153] Phosphoric acid and aluminum hydroxide are needed to prepare aluminum phosphate cement, and the materials should be prepared according to the following requirements.

[0154] ① phosphoric acid

[0155] Industrial grade, chroma≤30, phosphoric acid content (H 3 PO 4 )≥85.0%, chloride content (Cl)≤5ppm; sulfate content≤50ppm, iron (Fe)≤20ppm, arsenic (As)≤50ppm, heavy metal (Pb)≤10ppm.

[0156] ②Aluminum hydroxide

[0157] Indus...

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Abstract

The invention discloses an artificial core analysis and preparation method for displacement experiments based on experiments and mathematical algorithms combining qualitative and quantitative methods. The physical parameters of the artificial core are taken as the target parameters for the preparation of the artificial core; the influencing factors of the physical parameters of the artificial core are determined; several combined experiment schemes are formulated, and the artificial core is made according to each combined experimental scheme, and the physical parameters of the artificial core are measured after the preparation is completed; Based on the preparation condition parameters of the experimental plan, based on the gray correlation analysis method, the correlation degree between each influencing factor and each target parameter is determined; according to the ranking of the correlation degree between each influencing factor and the target parameter, the larger influencing parameter and the smaller influencing parameter are determined ;Based on the statistical analysis results of the gray correlation method and BP neural network theory, a particle size ratio prediction mathematical model is established; the ratio prediction results are calculated through the particle size ratio prediction mathematical model, and this is used as a reference to provide data support for making artificial cores.

Description

technical field [0001] The invention relates to an artificial rock core preparation technology, in particular to a method for analyzing and preparing an artificial rock core for a displacement experiment based on experiments and mathematical algorithms. Background technique [0002] In the process of petroleum development, in order to obtain formation physical parameters, it usually relies on coring wells to obtain cores, and the physical parameters are determined through indoor experimental analysis. However, the cost of coring is high, and the integrity of coring is restricted by process technology and formation conditions. For the qualitative research of indoor core displacement experiments in the field of petroleum development, most of them need to prepare artificial cores that meet the requirements, and do not need to spend high costs to take cores. According to the experimental research needs of specific petroleum development laboratories, the requirements for artific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06N3/08
CPCG06N3/084G06F30/20
Inventor 秦正山罗沛周建良罗明伟何腾飞王侨吴柯欣陈春江刘先山张静雅谢晶
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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