Device for testing true triaxial hydraulic fracturing strain characteristic of rock

A technology of hydraulic fracturing and characteristic testing, which is applied in the direction of applying stable tension/pressure to test the strength of materials, etc., to achieve the effect of complete functions, convenient operation, beautiful and compact overall structure

Inactive Publication Date: 2018-04-20
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, under the joint action of hydraulic fracturing and triaxial stress, the research on the real-time recording and quantitative description of the stre

Method used

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  • Device for testing true triaxial hydraulic fracturing strain characteristic of rock
  • Device for testing true triaxial hydraulic fracturing strain characteristic of rock
  • Device for testing true triaxial hydraulic fracturing strain characteristic of rock

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Embodiment Construction

[0025] The technical solution of the present invention will be described in detail below through the embodiments and the accompanying drawings.

[0026] Such as Figure 1-3 As shown, a rock true triaxial hydraulic fracturing strain characteristic test device of the present invention includes a loading frame 1, an axial lifting mechanism, an axial load sensor 2, a hydraulic fracturing plug 3, a strain gauge 11, and a static strain gauge 12. True three-axis gripper, X-direction stress control system, Y-direction stress control system, hydraulic fracturing control system, the axial lifting mechanism is installed at the bottom of the loading frame 1, and the axial load sensor 2 is installed at the loading The upper part of the frame 1, and is located directly above the axial lifting mechanism;

[0027] Such as figure 2 As shown, the true three-axis holder includes a holder cylinder 4, a two-way loading liquid bag 5, an upper end cover 6, and a lower end cover 7. The holder cylinder 4...

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Abstract

The invention discloses a device for testing the true triaxial hydraulic fracturing strain characteristic of a rock. The device includes a loading frame, an axial lifting mechanism, an axial load sensor, a hydraulic fracturing plug, a strain gauge, a static strain gauge, a true triaxial clamper, an X-direction stress control system, a Y-direction stress control system and a hydraulic fracturing control system, the axial lifting mechanism is arranged at the bottom of the loading frame, and the axial load sensor is arranged at the upper part of the loading frame; the X-direction stress control system and the Y-direction stress control system are respectively connected to the left side and the right side of the cylindrical shell of the clamper through stress joints; and the strain gauge is vertically arranged in a cavity and contacts with a rock core to be tested, and the static strain gauge is respectively electrically connected with the strain gauge and the axial load sensor. The devicerealizes the development of indoor hydraulic fracturing experiments and test of the stress and strain characteristics of the rock during the experiments by using true triaxial stress loading, and hasthe advantages of beautiful and compact overall structure, complete functions and easiness in operation.

Description

Technical field [0001] The invention relates to the technical field of petroleum geology, and specifically to a rock true triaxial hydraulic fracturing strain characteristic testing device. Background technique [0002] Since natural rocks are generally subjected to three-dimensional stress in the underground environment, the laboratory study of the stress-strain characteristics of the rock during hydraulic fracturing under the three-dimensional stress state can better reflect the actual situation of the natural rock mass. [0003] Limited by true triaxial stress loading, the existing equipment is generally limited to hydraulic fracturing fluid pressure and flow monitoring, which can locate and record the occurrence and expansion of fractures in the fracturing simulation test; [0004] For example, the publication number is 105352811A, the publication date of the Chinese patent document on February 24, 2016 discloses a small hydraulic fracturing triaxial evaluation test pressurizatio...

Claims

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Application Information

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IPC IPC(8): G01N3/12
CPCG01N3/12
Inventor 尹丛彬龚蔚朱炬辉龚顺祥刘静左建东陈健袁灿明
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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