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Filter cake strength layered testing device and method

A layered test, filter cake technology, applied in the direction of measuring devices, strength characteristics, using a stable shear force to test the strength of materials, etc., can solve the problem that the strength is difficult to establish

Inactive Publication Date: 2016-06-15
SOUTHWEST PETROLEUM UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the obtained strength is not the interlayer strength of the filter cake. The force direction of the probe is perpendicular to the filter cake, which is inconsistent with the direction of the wall shear force generated by the fluid flow in the annulus. relation

Method used

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  • Filter cake strength layered testing device and method
  • Filter cake strength layered testing device and method
  • Filter cake strength layered testing device and method

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Embodiment Construction

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Based on the embodiments of the invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] see figure 1 .

[0031] A filter cake strength layered testing device, which is composed of a scraper assembly, a sensor assembly, a motion assembly, a core clamping assembly or a plate holder, a control assembly, and a data acquisition and output assembly. slide rail18.

[0032] Described scraper assembly is made up of scraper 9 and scraper clamp 7, and scraper 9 is fixed by scraper clamp 7. The shape of the blade edge of the scraper is horizontal, and the material is stainless steel or a...

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Abstract

The invention discloses a device and method for testing filter cake strength stratification. The motor drives the scraper assembly to move horizontally along the horizontal beam, and to move up and down vertically along the longitudinal beam. The stepper motor is connected to the core clamping assembly. The sensor assembly is composed of a pressure sensor, a displacement sensor, and a rotation angle sensor. The control assembly is composed of It is composed of programming logic controller, servo driver and stepping driver, and the data acquisition and output component is composed of data collector and man-machine interface. The device can test two types of filter cake samples of different shapes: filter cake samples attached to cylindrical rock cores, and filter cake samples attached to flat filter media such as filter paper screens. The invention can provide a more accurate filter cake strength quantification method, provide a basis for establishing the relationship between interlayer strength and wall shear stress, and guide the filter cake removal before cementing.

Description

technical field [0001] The invention relates to a test device and a test method for filter cake strength in the process of oil and gas exploration and development. Background technique [0002] During the drilling of oil and gas wells, the filter cake formed by drilling fluid on the wellbore wall is an important factor to reduce the damage of drilling fluid to the reservoir and maintain the stability of the wellbore wall and the quality of the borehole. According to the existing research, due to the difference in the size of the solid phase particles in the drilling fluid, there are differences in the strength and compactness of the filter cake in the thickness direction. The virtual mud cake with loose structure near the surface is very unfavorable to the cementing quality, which will reduce the bonding quality of the cement sheath and the wellbore wall, and may form fluid channeling channels in the later stage. Therefore, it is desirable to remove the wellbore filter cake...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0003G01N2203/0025
Inventor 黄盛郭小阳张兴国李早元程小伟刘健李明辜涛柳洪华
Owner SOUTHWEST PETROLEUM UNIV
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