Visco-elastic strain field ground stress measurement device and measurement method

A testing device, viscoelasticity technology, applied in the direction of force measurement, measurement device, permanent deformation force measurement by measuring gauge, etc. by measuring the change of optical properties of the material when it is stressed, which can solve the direction of finding the in-situ stress and size, etc., to achieve the effect of reliable results, intuitive visual display of results, and simple operation.

Inactive Publication Date: 2015-12-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

The existing methods for calculating the magnitude and direction of geostress all have certain limitations, so each has advantages and disadvantages, and it is generally difficult to accurately obtain the direction and magnitude of geostress at the same time

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  • Visco-elastic strain field ground stress measurement device and measurement method
  • Visco-elastic strain field ground stress measurement device and measurement method
  • Visco-elastic strain field ground stress measurement device and measurement method

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Embodiment Construction

[0020] Refer to attached Figure 1-3 , a viscoelastic strain testing device for measuring on-site stress in the present invention, including a scanning multi-stage speed loading system A, a laser scanning system B, a core clamping system C, a data acquisition system D, and a computer post-processing system E, Among them, the laser scanning system B is set above the core clamping system C to realize the data measurement of the deformation of the rock surface; the scanning multi-level speed loading system A is combined with the laser scanning system B to realize the periodic measurement of the data collected on the rock surface; the data acquisition system D Attached to the laser scanning system B, it realizes the data measurement and collection of the deformation of the rock surface, and transmits it to the computer post-processing system E for storage; through the computer post-processing system E, the deformation degree of the rock during the rock in-situ stress test is calcul...

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Abstract

The invention relates to a visco-elastic strain field ground stress measurement device and a measurement method. The measurement device comprises a rock core clamping system, a laser scanning system, a scanning multistage speed loading system, a data acquisition system and a computer post-processing system, wherein the laser scanning system is sleeved above the rock core clamping system to realize measurement on data of exterior rock deformation, the scanning multistage speed loading system is in combination with the laser scanning system to realize periodic detection on exterior rock acquisition data, and the data acquisition system is attached to the laser scanning system to realize measurement, acquisition and collection of the exterior rock deformation data and transmitting the data to the computer post-processing system for storage and processing. The measurement device can measure the field strain ground stress, operation is simple, the result is reliable, and the result can be visually displayed. The invention further discloses a method utilizing the measurement device for measurement. According to the device and the method, the measurement result can provide important test technology support for ground stress measurement.

Description

technical field [0001] The invention relates to a petroleum drilling engineering technology, in particular to a testing device and a measuring method for viscoelastic strain measuring site stress. Background technique [0002] In petroleum drilling and production engineering, more and more data about the in-situ stress state are needed, such as the stability of the wellbore during drilling; the prediction of formation fracture pressure; the design of fracturing engineering; the formation fracture of high-pressure water injection; the sliding and resurrection of faults ; Calculation of external load of underground pipe string and calculation of anti-collapse life, etc. The existing methods for calculating the magnitude and direction of geostress all have certain limitations, so each has advantages and disadvantages, and it is generally difficult to accurately obtain the direction and magnitude of geostress at the same time. Contents of the invention [0003] The purpose of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/06G01N29/11
CPCG01B11/16G01L1/06G01L1/24G01L5/0047G01N11/00G01N29/04G01N29/11G01N2011/0073G01N2291/0232G01N2291/02818G01N2291/02827
Inventor 王京印张玉刘晓兰贾江鸿董广华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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