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A Method for Making Rock Thin Sections in Visual Realistic Core Models

A technology of real core and manufacturing method, which is applied in the field of manufacturing rock slices in the visualized real core model, can solve the problems of high cost of rock slices, and achieve the effects of suitable production volume, good light transmission performance, and simple operation

Active Publication Date: 2015-10-14
PETROCHINA CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] In order to solve the technical problem of high cost of producing rock slices with existing equipment, the present invention provides a method for manufacturing rock slices in a visualized real core model

Method used

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  • A Method for Making Rock Thin Sections in Visual Realistic Core Models
  • A Method for Making Rock Thin Sections in Visual Realistic Core Models

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Embodiment Construction

[0028] The core thin slices used for microscopic observation are required to have light transmission, and the collected images should clearly reflect the seepage phenomenon, so the thickness of the thin slices is required to be less than 0.5mm. Limited by the existing microscopic seepage experiment process, the length and width of the slice should not be less than 8cm and 2cm. When the core is 0.5mm thick, the force of the cement between rock particles is extremely weak and easily damaged. The large area (8cmX2cm) also makes it easy to have uneven thickness during the grinding process, and when the degree is greater than 0.1mm, it will affect the observation. Ordinary grinding technology usually can only reach a thickness of 0.8mm; the method of casting thin slices is also not advisable, the reason is: once the metal casting material injected into the rock pollutes the core, the cast still occupies the pore space after the thin slice is made, and there is no Experimental cond...

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Abstract

The invention provides a manufacturing method for a rock slice in a visual real core model. The manufacturing method comprises the following steps: firstly, bonding a core slice (1) to be ground, a base core slice (2) and a base material (3) all arranged in a stacking manner; secondly, grinding the surface of the core slice (1) to be ground; thirdly, separating the core slice (1) to be ground from the base core slice (2). According to the manufacturing method, the core slice with the thickness conforming to the requirement can be manufactured by using a common grinding mill, reserves the whole information of a real rock such as solid phase components, a hole structure and the communicating performance, and has such advantages as good translucency and appropriateness for observation.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development experiments, in particular to a method for manufacturing rock thin slices in a visualized real core model. Background technique [0002] Microscopic seepage experiment is an important experimental technique for mechanism research in the field of oil and gas field development, and its core content is to observe the seepage process of fluid in the microscopic model. [0003] In order to simulate the seepage conditions of high-temperature and high-pressure reservoirs, microscopic models are divided into internal models and external models. The inner model is the observation medium, and the most commonly used one is the glass model; the outer model provides a high-temperature and high-pressure environment for the inner model, and has a heating system and a pressure-resistant design. [0004] At present, the internal model is mainly a glass etching model, and various patterns are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 秦积舜陈兴隆李实俞宏伟张可李军姬泽敏
Owner PETROCHINA CO LTD