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Preparation method of micro-fracture rock core mode

A technology of core model and micro-fracture, which is applied in the field of preparation of micro-fracture core model, can solve the problem that the core cannot be completely simulated

Inactive Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot fully simulate cores with different fracture widths

Method used

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  • Preparation method of micro-fracture rock core mode
  • Preparation method of micro-fracture rock core mode
  • Preparation method of micro-fracture rock core mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] Select two compact natural core samples with a diameter of 2.5 cm and one dense artificial core sample with a diameter of 2.5 cm, split the cores along the axis, and press figure 1 The arrangement of the supports shown is to place the PET film. The length of the film is the same as that of the core sample, and the width is 0.5cm. The thickness of the film is 20 μm, 200 μm, 500 μm,

[0056] Select a dense artificial core sample with a diameter of 2.5 cm, select two wedge-shaped strips with a width of 0.5 cm, an inlet thickness of 300 μm, and an outlet thickness of 100 μm. The raw tape is fixed to form a micro-fracture core model.

[0057] The openings of the micro-fracture core models formed by the above method are 20 μm, 200 μm, 500 μm, and a wedge-shaped fracture.

[0058] Four iron cores with fracture openings of 400 μm and 500 μm were selected for comparison.

[0059] Plugging slurry formula: 2% bentonite slurry + 2% 100 mesh super calcium + 2% 400 mesh mica powder +...

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Abstract

The invention discloses a preparation method of a micro-fracture rock core model. The method comprises steps of: a. selecting a rock core sample; b. splitting the selected rock core along the axis into two rock samples, and maintaining the rock core split surface with a certain roughness; c. arranging at least two supports for supporting the width of the crack on a section of one of the rock samples; d. placing the second rock sample on the section on the section of the support so that the two rock samples are connected to each other according to the original section; and e. jointing, sealingand fixing the joint of the produced model by an adhesive, and integrally jointing and fixing the whole model to obtain the micro-crack rock core model. The micro-fracture rock core model of the invention can have a slit width of 20 to 500 [mu]m and a rough section, better simulates the micro-fracture morphology of the real stratum relative to the smooth iron core section, and can be reused.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, and more particularly relates to a method for preparing a micro-fracture core model. Background technique [0002] In the process of oil and gas exploration, coring tools are usually used in key well sections to drill out core samples. The characteristics of the formation can be further analyzed through experiments to provide important technical guidance for engineering construction. However, due to limited conditions, micro-fractures develop In the well section, the coring was incomplete or insufficient, and the experimental analysis could not be completed. Therefore, according to the characteristics of the formation, a core model simulating the characteristics of the formation can be produced in the laboratory, and targeted experimental research can be carried out by spud drilling, so as to provide strong technical support for oil and gas exploration and development. [0003] The Ch...

Claims

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Application Information

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IPC IPC(8): G09B23/40
CPCG09B23/40
Inventor 韩子轩李大奇柴龙林永学陈晓飞甄剑武高书阳王显光唐文全
Owner CHINA PETROLEUM & CHEM CORP
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