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Apparatus and method for evaluating stability of displacement interface

A technology for evaluating devices and stability, applied in construction and other fields, can solve problems such as non-existence

Active Publication Date: 2019-10-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: there is no device for evaluating the stability of the displacement interface of two relative fluids in the cementing displacement in the prior art, and the stability law of the displacement interface under various displacement conditions cannot be obtained more accurately

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  • Apparatus and method for evaluating stability of displacement interface
  • Apparatus and method for evaluating stability of displacement interface
  • Apparatus and method for evaluating stability of displacement interface

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Embodiment Construction

[0040] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0041] The technical problem to be solved by the present invention is that there is no device in the prior art for evaluating the stability of the displacement interface of two opposing fluids in cementing displacement, and the stability law of the displacement interface under various displacement conditions cannot be obtained more accurately. In order to solve the above technical problems, an embodiment of t...

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Abstract

The invention discloses a displacement interface stability evaluating device and method. The displacement interface stability evaluating device comprises a simulated annulus shaft, a rotary support, an eccentric adjusting part, a controller and multiple measurement pairs. Whether a displacement interface is stable or not can be judged by continuously acquiring the flowing speeds of annulus core speed zones at different measuring points in real time and distinguishing different displacement fluids and displacement interfaces based on time difference and further only by calculating the flowing speed change of front and rear edges of the displacement interface lengths and the flowing speed change of the front edges of the displacement interfaces within a certain time period, and an experiment for evaluating influence laws of different factors to interface stability can be performed through the device.

Description

technical field [0001] The invention relates to the field of cementing technology, in particular to a device for evaluating the stability of a displacement interface of two relative fluids in cementing displacement, and also relates to a method for evaluating the stability of a displacement interface based on the evaluation device. Background technique [0002] Cementing displacement efficiency has a very important influence on the evaluation of cementing quality. The displacement efficiency is closely related to the morphology of the displacement interface, and the morphology of the displacement interface mainly depends on the length of the displacement interface. Generally speaking, the shorter the interface length during the displacement process, the better the displacement, the higher the displacement efficiency and the better the cementing quality. However, due to the limitation of research technology and testing level, the research on cementing displacement interface ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/005
Inventor 张晋凯周仕明方春飞杨红歧陶谦
Owner CHINA PETROLEUM & CHEM CORP