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A spontaneous imbibition measurement device for shale

A spontaneous imbibition and measurement device technology, applied in the direction of measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problems that the shale imbibition process cannot be truly simulated, and achieve neat and beautiful measurement devices , easy operation and simple structure

Active Publication Date: 2018-08-21
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during field operations, shale is in contact with fracturing fluid several kilometers underground. The specific environment for this process is high temperature and high pressure. It can be seen that the existing research cannot truly simulate the imbibition process of shale.

Method used

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  • A spontaneous imbibition measurement device for shale
  • A spontaneous imbibition measurement device for shale
  • A spontaneous imbibition measurement device for shale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this embodiment, the spontaneous imbibition experiment is carried out on the rock core of the tight reservoir in a high-pressure environment. The fluid is distilled water. The permeability is 0.013md, the total amount of clay minerals is 31.2%, and the content of chlorite is 97%, containing a small amount of illite. In this embodiment, the variation of the water absorption of the rock core with time under high-pressure environment is measured.

[0048] Such as figure 1 with figure 2 As shown, an embodiment of the spontaneous imbibition measurement device for shale according to the present invention includes a confining pressure pump 1, a core holder 2 and a pipeline, and the confining pressure pump 1 is connected to the rock through the pipeline I6. The core holder 2 is connected. It also includes a scale tube 3, a control valve I4 and a control valve II5, the scale tube 3 is connected to the bottom of the core holder 2 through a pipeline II7, and the control val...

Embodiment 2

[0063] Such as Image 6 with Figure 7 As shown, according to another embodiment of the spontaneous imbibition measuring device for shale of the present invention, its basic structure, connection relationship and beneficial effects between the various components are all the same as in Embodiment 1, and the difference is: A heating device 23 is included. After adopting the heating device, the rock core still needs to be dried before being put into the rock core holder. Put the dried core into the core holder in the heating device, then raise the heating device to 80°C and keep it warm to provide a high temperature environment for the spontaneous imbibition of the core, and apply it after the temperature of the heating device is stable. The confining pressure provides a high-pressure environment for the spontaneous imbibition of the core.

[0064] The core holder 2, the core 14, the rubber sleeve 15, the plunger I16 and the plunger II17 are placed inside the heating device 23...

Embodiment 3

[0074] According to another embodiment of the spontaneous imbibition measurement device and method for shale of the present invention, it is cocurrent displacement or cocurrent and reverse mixed displacement. When the control valve II is opened, the inside of the core holder The environment is connected with the external environment, and the result obtained at this time is the result of synchronous displacement or a mixture of synchronous and reverse displacement. The structure of the measuring device, the connection relationship between the components and the beneficial effects are all the same as in the first embodiment; the process flow of the measuring method is basically the same as in the first embodiment, except that step 2: open the control on the top of the core holder valve while opening the control valve at the bottom of the core holder.

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Abstract

The invention relates to a shale spontaneous imbibition measurement device which comprises an ambient pressure pump, a rock core clamper and pipelines, wherein the ambient pressure pump is connected with the rock core clamper through the pipeline I; the device further comprises a graduated tube, a control valve I, a control valve II and a control panel; the graduated tube is connected with the bottom of the rock core clamper through the pipeline II; the control valve I is connected with the bottom of the rock core clamper through the pipeline III; the control valve II is connected with the top of the rock core clamper through the pipeline IV; the rock core clamper, the graduated tube, the control valve I and the control valve II are arranged in front of the control panel; the pipelines, namely the pipeline I, the pipeline II, the pipeline III and the pipeline IV are arranged in the rear of the control panel. The measurement device, disclosed by the invention, is simple in structure, convenient to operate, capable of saving cost, simulating spontaneous imbibition process of shale under a high pressure environment and enabling the simulation process to be more aligned with the actual situation, and more real and reliable in measured results.

Description

technical field [0001] The invention belongs to the technical field of petroleum engineering, in particular to a spontaneous imbibition measuring device for shale. Background technique [0002] Spontaneous imbibition is a common natural phenomenon that occurs in porous media. For unconventional reservoirs, using spontaneous imbibition to study it is a relatively advanced technology in the world. In the research of tight reservoirs, especially in the research of low porosity and low permeability shale gas reservoirs, evaluating the spontaneous imbibition strength of reservoir rocks is the focus of research. Firstly, due to the small volume of low-permeability reservoirs, most of which are in the micron or even nano-scale, the spontaneous imbibition phenomenon caused by capillary force is more obvious than conventional reservoirs, and has a greater impact on the reservoir; secondly, low-permeability reservoirs The water absorption capacity of the reservoir depends on the lith...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/082
Inventor 申颍浩葛洪魁杨志辉宿帅李曹雄任凯王国臻冯乃超付冰
Owner CHINA UNIV OF PETROLEUM (BEIJING)