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Chip oil reservoir and preparation method thereof

A reservoir and chip technology, applied in chemical instruments and methods, earth square drilling, preparation of test samples, etc., can solve the problems of not having real reservoir characteristics, ignoring, restricting the research and development of experimental authenticity, etc.

Active Publication Date: 2019-10-08
TSINGHUA UNIV
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Problems solved by technology

Most of the current microfluidic structure designs are artificial designs, such as array structures, which do not have the characteristics of real reservoirs; some use the structure of two-dimensional core slices, but the connectivity of two-dimensional structures is poor, and two-dimensional core slices cannot directly represent its real three-dimensional structural features
Therefore, the current chip reservoir design ignores many characteristics of the real core structure, which seriously restricts the authenticity of the experiment and the research and development of enhanced oil recovery technology.

Method used

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  • Chip oil reservoir and preparation method thereof
  • Chip oil reservoir and preparation method thereof
  • Chip oil reservoir and preparation method thereof

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Embodiment 1

[0055] A method for making an oil reservoir on a chip, comprising:

[0056] (1) Select real reservoir cores (sandstone, such as figure 1 shown in a), and use micro-CT to scan the three-dimensional structure of the real reservoir core (such as figure 1 shown in b);

[0057] (2) Use matlab or imageJ software to reconstruct the three-dimensional structure of the real reservoir core obtained by scanning, and use the maximum sphere method to extract pore size distribution characteristics (such as figure 1 Shown in c, the abscissa is the pore diameter μm, and the ordinate is the pore volume fraction %);

[0058] (3) According to the obtained pore size distribution characteristics, the formation of the pore structure of the real oil reservoir core and the accumulation form of rock particles are analyzed, and the main large particles (referring to volume accounting for the entire rock solid matrix) in the rock particles are extracted. Particles whose volume is more than 1% of the v...

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Abstract

The invention relates to a chip oil reservoir and a preparation method thereof. The method comprises the following steps: carrying out three-dimensional-structure scanning and reconstruction on a realoil reservoir core, extracting the pore size distribution characteristics, analyzing formation of the pore structure of the true oil reservoir core and analyzing accumulation morphology of rock particles, extracting morphology of main large particles in the rock particles, and constructing a large-particle morphology database; randomly distributing large particles and small particles, and respectively projecting the large particles and the small particles into a porous medium region and a remaining region of the chip oil reservoir to obtain a chip oil reservoir structure picture; importing the chip oil reservoir structure picture into a drawing software, and drawing inlet and outlet areas of the chip oil reservoir structure to obtain a chip oil reservoir design diagram; and etching the chip oil reservoir design diagram on a substrate, and carrying out anodic bonding with punched heat-resistant glass at the upstream and downstream positions to obtain the chip oil reservoir. The chip oil reservoir prepared by the method disclosed by the method can ensure main structural characteristics of a real rock core to the maximum extent.

Description

technical field [0001] This application relates to but not limited to the field of oil and gas exploration, development and utilization, especially a chip reservoir and its manufacturing method. Background technique [0002] Oil and gas resources have always been the lifeblood of my country's energy security, and its production needs to be steadily increased. Enhanced oil recovery is an important means to steadily increase the production of oil and gas resources. However, the mechanism of enhanced oil recovery is currently unclear, especially the mechanism of multiphase flow in complex porous media, which seriously affects the development and application of related enhanced oil recovery technologies and methods. [0003] With the development of microchip technology, microfluidic chip experiment is a powerful means to study the mechanism of pore-scale multiphase flow and study the mechanism of enhanced oil recovery. Compared with real cores, microfluidic chips have many adv...

Claims

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Application Information

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IPC IPC(8): B01L3/00G01N1/28
CPCB01L3/502707G01N1/28B01L2200/12B01L2300/0816E21B43/00E21B2200/20G06T17/05E21B49/00G06T2200/08
Inventor 王沫然雷文海刘通杨光
Owner TSINGHUA UNIV
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