Fracture three-dimensional size-controllable fracture network-matrix double-medium model and preparation method thereof

A three-dimensional size, dual-media technology, applied in the direction of material inspection, soil material testing, etc., can solve the problems of uncontrollable fracture width of dense oil fracture network model, too simple model shape, poor repeatability, etc., to achieve flexible model shape Adjustment, model repeatability, and easy-to-make effects

Inactive Publication Date: 2018-01-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] In order to solve the existing problems of uncontrollable fracture width, too simple model shape, complicated manufacture and poor repeatability in the existing compact oil fracture network model, the present invention provides a safe production, strong repeatability, controllable fracture width and other factors. Economical fracture network-matrix dual-media model with controllable three-dimensional fracture size and its preparation method

Method used

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  • Fracture three-dimensional size-controllable fracture network-matrix double-medium model and preparation method thereof
  • Fracture three-dimensional size-controllable fracture network-matrix double-medium model and preparation method thereof
  • Fracture three-dimensional size-controllable fracture network-matrix double-medium model and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] image 3 Make a flowchart for the fracture network-matrix dual-media model with controllable three-dimensional fracture size of the present invention, such as image 3 Shown:

[0055] (1) Select a standard core and cut it into a certain number of core segments.

[0056] Select a 10cm long cylindrical standard rock core, take the length direction of the rock core as the transverse direction, and take the direction perpendicular to the transverse direction as the longitudinal direction, and use a core cutting machine to cut the standard rock core into 4 sections of core section 1 with a length of 2 cm along the longitudinal direction;

[0057] In order to study the fracture network law of the real reservoir, this embodiment is based on a cylindrical real standard core, and the diameter of the end face is a standard size of 25±1mm. For holders of different shapes, standard cores can also be replaced with cube or cuboid cores.

[0058] (2) Cutting the core section 1 into...

Embodiment 2

[0065] As described in Example 1, the difference is: as Figure 6 As shown, the vertical and horizontal directions of the four core segments 1 are naturally spliced, and the fractures formed in each core segment 1 are combined to form the fracture network structure of the model.

[0066] The overall suture network is composed of ab, bc, cd, de, ef, fg, and gh, the suture length is the sum of the lengths of the above seven line segments, the suture height is the average value of L and L', and the suture width is w.

Embodiment 3

[0068] As described in Example 1, the difference is: as Figure 7 As shown, the vertical and horizontal directions of the three core segments 1 are naturally spliced, and the fractures formed in each core segment 1 are combined to form the fracture network structure of the model.

[0069] The overall seam network is composed of ab, bc, cd, de, and ef, the seam length is the sum of the lengths of the above five line segments, the seam height is the average value of L and L', and the seam width is w.

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Abstract

The invention relates to a fracture three-dimensional size-controllable fracture network-matrix double-medium model and a preparation method thereof. The model is formed by combining different rock core segments; each of the rock core segments is formed by combining different rock core blocks formed by axially cutting along the rock core segment; a gap is formed among the different rock core blocks, a gap is also formed among the different rock core segments, and the gap among the different rock core blocks and the gap among the different rock core segments form a model fracture. Rock cores are cut into a certain quantity of rock core segments, the rock core segments are cut into the rock core blocks, and the rock core blocks and the rock core segments are sequentially spliced to be combined into the model. The fracture width of the fracture network-matrix double-medium model provided by the invention can be effectively controlled, the model shape can be flexibly adjusted, the manufacture is simple, and the model repeatability is strong.

Description

technical field [0001] The invention belongs to the field of tight oil exploration and development, and in particular relates to a fracture network-matrix dual-media model with controllable three-dimensional fracture dimensions and a preparation method thereof. Background technique [0002] Tight oil refers to the accumulation of oil in tight reservoirs located in high-quality oil-generating formations without large-scale and long-distance migration. In my country, tight oil accounts for 2 / 5 of the recoverable oil resources and has broad exploration potential. prospect. In recent years, my country has made major breakthroughs in the development of tight oil resources. Areas with reserves of 500 million to 1 billion tons have been discovered in the Ordos Basin and other places. It is preliminarily estimated that the national geological resources have exceeded 20 billion tons. [0003] However, the microstructure and flow mechanism of tight reservoirs are very complex. The res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 孙永鹏戴彩丽何皓楠方彦超由庆赵明伟赵光吴一宁刘逸飞
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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