Device and method using light reflection difference to detect rock pore structure

A technology of pore structure and poor light reflection, applied in the field of optical instruments, can solve problems such as the inability to evaluate reservoir rocks without interconnected pores, the inability to quantitatively evaluate porosity, and the destruction of pore structure

Pending Publication Date: 2016-06-29
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

The mercury porosimetry has obvious damage to the pore structure of the sample, and cannot truly reflect the pore characteristics of the sample; the gas adsorption method uses gases with different molecular diameters such as nitrogen and carbon dioxide to measure the volume of the pore space and the degree of connectivity of the corresponding pore size. Evaluation of non-interconnected pores in reservoir rocks
Scanning electron microscopy can obtain high-magnification rock photos, which can clearly reflect the pore characteristics of two-dimensional cross-sections, but cannot quantitatively evaluate the porosity

Method used

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  • Device and method using light reflection difference to detect rock pore structure
  • Device and method using light reflection difference to detect rock pore structure

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0025] In order to effectively realize the measurement of rock pore structure, an embodiment of the present invention provides a light reflection difference device and method for rock pore structure detection. figure 1 It is a schematic diagram of the composition of the light reflection difference device for rock pore structure detection in the embodiment of the present invention. Such as figure 1 As shown, the device of this embodiment includes an incident optical path, a sample stage 106, a sample cell 107, an outgoing optical path, a signal amplification device 11...

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Abstract

The invention provides a device using a light reflection difference method to detect a rock pore structure. The device comprises an incident light path, a sample table, a sample tank, an emergent light path, a signal amplifier and a data collecting and processing system, wherein the incident light path comprises a laser, a polarizer, a photoelastic modulator and a phase shifter, the emergent light path comprises a polarization analyzer and a photoelectric signal converter, the incident light path further comprises a focusing device located between the phase shifter and the sample table, the photoelectric signal converter is a photoelectric diode, and the signal amplifier is a phase-locked amplifier. The device is simple in structure, easy to operate, capable of greatly increasing signal to noise ratio and capable of fast and accurately measure the rock pore structure.

Description

technical field [0001] The invention relates to an optical instrument, in particular to a device and method for detecting rock pore structure by light reflection difference. Background technique [0002] Rock pores refer to pores that exist between rock particles and have a pore diameter of nanometer scale. The pore structure characteristics of reservoir rocks refer to the geometric shape, size, distribution and interconnection of pores and throats in rocks, which are important aspects that determine the microscopic fluid migration mechanism, and the spatial distribution of their properties is self-similar. It is a material with typical fractal characteristics, and it is an important indicator for analyzing oil shale oil storage and oil production. Its research plays an important role in oil exploration and production. [0003] Traditional rock pore structure measurement methods mainly include mercury injection method, gas adsorption method, scanning electron microscopy ima...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/088G01N21/4738G01N2021/4764
Inventor 赵昆王金詹洪磊孙琦
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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