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Experimental device and method thereof for physical simulation of natural fractures with pre-set media

A technology of natural fractures and physical simulation, applied in teaching models, earthwork drilling, mining fluids, etc., can solve the problems of inability to simulate the sealing environment of natural fractures, inability to accurately meet, inability to simulate extension, etc., to achieve diversity and operation The effect of convenience and simple structure

Active Publication Date: 2017-12-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the pouring process, cracks with medium (such as placing A4 paper) will lead to crack deformation to varying degrees, which cannot accurately meet the state of the experimental requirements, and ultimately affect the experimental results; if it is cut after the specimen is completed, it can be Accurately set the intersection angle and inclination angle of natural fractures and artificial fractures, but it cannot simulate the closed environment of natural fractures, nor can it simulate the extension of artificial fractures and natural fractures.

Method used

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  • Experimental device and method thereof for physical simulation of natural fractures with pre-set media
  • Experimental device and method thereof for physical simulation of natural fractures with pre-set media
  • Experimental device and method thereof for physical simulation of natural fractures with pre-set media

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Such as Figure 1-12 As shown, according to the physical simulation experiment device of the natural fracture with medium preset in the present invention, the core pouring tank is assembled from the bottom plate 1, the side plate I2, the side plate II3, the wellbore side plate 4 and the seam loading side plate 5; The plate I2 and the side plate II3 are symmetrically arranged on the bottom plate 1, and the wellbore side plate 4 and the seam side plate 5 are symmetrically arranged on the bottom plate 1; the central part of the wellbore side plate 4 is opened Wellbore limit hole 6, rubber ring 7 and wellbore 8 are installed in the wellbore limit hole 6; a disc limit hole 9 is set in the center of the seam-loading side plate 5, and a disc limit hole 9 is installed in the disc limit hole 9. As for the seam fitting assembly, two protrusions 10 are arranged symmetrically on the circumference of the disk limit hole 9; Reed piece 15, limit groove 24 and spacer groove 25 are set...

Embodiment 2

[0081] According to another embodiment of the physical simulation experiment device and the method thereof of the natural fracture preset with the medium of the present invention, the structure of the experimental device, the connection relationship between each part, the experimental procedure, the working principle and the beneficial effect etc. are all consistent with the implementation Example 1 is the same, the difference is:

[0082] The width of slot I formed by the bottoms of the two wedge-shaped planes of the wedge-shaped slot is 3 mm; the width of slot II on the recliner is 3 mm. The rotation angle of the seaming disc is 90°, that is, the angle formed by the seam inserting plate and the side plate I or side plate II is 90°. The angle formed between the two wedge-shaped planes of the wedge-shaped slot is α=100º; the angle formed between the slotting plate and the wellbore is β, 0º≤β≤50º.

Embodiment 3

[0084] According to another embodiment of the physical simulation experiment device and the method thereof of the natural fracture preset with the medium of the present invention, the structure of the experimental device, the connection relationship between each part, the experimental procedure, the working principle and the beneficial effect etc. are all consistent with the implementation Example 1 is the same, the difference is:

[0085] The width of slot I formed by the bottoms of the two wedge-shaped planes of the wedge-shaped slot is 5 mm; the width of slot II on the recliner is 5 mm. The rotation angle of the seaming disc is 120°, that is, the angle formed by the seam inserting plate and the side plate I or side plate II is 120°. The angle formed between the two wedge-shaped planes of the wedge-shaped slot is α=120º; the angle formed between the slotting insert and the wellbore is β, 0º≤β≤60º.

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Abstract

The invention relates to an experimental device for physical simulation of natural fractures with pre-set media. The device comprises a base board, a side board I, a side board II, a wellhole side board and a sewing side board; a center part of the wellhole side board is provided with a wellhole spacing hole; a rubber ring and a wellhole are installed in the wellhole spacing hole; a center part of the sewing side board is provided with a disk spacing hole; a sewing assembly is installed inside the disk spacing hole. The invention also relates to a corresponding experimental method comprising following steps: installing a wellhole in the wellhole spacing hole in the wellhole side board; installing the sewing assembly in the disk spacing hole in the sewing side board; inserting and fixing clamping reeds in a spacing groove and a separating groove in a sewing inserting board; inserting the sewing inserting board in an insert seam II of an incliner and an insert seam I of a wedge insert slit; rotating the sewing disk so that a certain angle is formed between the sewing inserting board and the side board I or the side board II; a certain angle is formed between the sewing inserting board and the base board by rotating the incliner. The invention can accurately preset natural cracks and bedding in the core.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a physical simulation experiment device and a method for a natural fracture with a medium preset inside a rock core and a method thereof. Background technique [0002] With the development of petroleum exploration and development technology, the diversity of reservoirs encountered is also increasing, including carbonate and shale reservoirs with low porosity and low permeability, and coal formations mainly adsorbing gas. These reservoirs have some common characteristics: the production of industrial oil and gas flow requires hydraulic fracturing of the reservoir; reservoir bedding and fractures are developed, and these natural fractures and bedding have a significant impact on the orientation and shape of fractures during fracturing. Impact; using fracturing to release large quantities of adsorbed gas adsorbed on rocks, especially shale and coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B49/00G09B25/00
CPCE21B43/26E21B49/00G09B25/00
Inventor 侯冰常智金衍陈勉郭小锋高杰卢运虎林伯韬周舟
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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