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Acidic etching instrument and operation method thereof

A technology of acidizing etching and operation method, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of not representing the actual situation of the reservoir, high cost, difficult experiments, etc. Difficulty, improve work efficiency

Inactive Publication Date: 2013-08-07
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The specific disadvantages of the existing technology are as follows: 1. It is difficult to use the actual core of the reservoir due to the experimental requirements, the experimental results cannot represent the actual situation of the reservoir, and the core preparation is difficult; 2. The experiment is difficult, high in cost and low in efficiency; 3. .It is impossible to track the change of the etching form of the crack wall in real time, and it is impossible to truly realize the optimization of liquid and process

Method used

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  • Acidic etching instrument and operation method thereof

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Experimental program
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Effect test

Embodiment 1

[0047] Such as figure 1 as shown,

[0048] The acidification etching instrument includes a visualized core holder 8 made of transparent material, the visualized core holder 8 is a hollow closed structure, the upper end of the visualized core holder 8 is provided with an upper through hole, and the lower end is provided with a lower through hole , both the upper end through hole and the lower end through hole are connected with the inside of the visualized core holder 8 .

[0049] Sealing pads are provided inside the upper end and the lower end of the above-mentioned visualized rock core holder. Gaskets are used to seal both ends of the core held in the visualization core holder. because. In the actual etching environment. The ends of the core are not etched, but are actually the sides of the core that are etched. The prior art is to perform planar etching. Therefore, all surfaces of the core are subjected to etching treatment, so the experimental data in the later period...

Embodiment 2

[0085] The acidification etching instrument includes a visualized rock core holder 8 made of transparent material. The visualized rock core holder 8 is a cylindrical hollow closed structure. The upper end of the visualized rock core holder 8 has an upper through hole and a lower end. The lower through hole, the upper through hole and the lower through hole all communicate with the inside of the visualized rock core holder 8 .

[0086] It also includes a drain pipe communicated with the through hole at the upper end.

[0087] It also includes a pressure-stabilizing, temperature-stabilizing and acid-stabilizing device communicating with the through hole at the lower end.

[0088] The pressure-stabilizing, temperature-stabilizing and acid-stabilizing device includes a six-way valve 4 connected to the through hole at the lower end. The six-way valve 4 is connected to three liquid storage tanks 3. The liquid storage tanks 3 are placed in the constant temperature water bath 2. The t...

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Abstract

The invention discloses an acidic etching instrument and an operation method thereof. The acidic etching instrument comprises a visualized core holder made of transparent materials, wherein the visualized core holder is of a hollow sealed structure, the upper end of the visualized core holder is provided with an upper through hole, the lower end of the visualized core holder is provided with a lower through hole, and the upper through hole and the lower through hole are both communicated with the inside of the visualized core holder. The acidic etching instrument and the operation method thereof disclosed by the invention have the beneficial effects that the instrument adopts a one-inch columnar core, therefore, an effect of easy processing is achieved, and actual reservoir cores can be adopted for carrying out experimental researches; the etching form of cores can be subjected to real-time tracking; and the whole acidic rock reaction process is reflected really, and a study on the change of annular fracture diverting capacity can be performed, thereby achieving the purpose of optimizing an acidizing fluid system and an acidizing process.

Description

technical field [0001] The invention relates to acidification etching equipment and an operation process for formation cores, in particular to an acidification etching instrument and an operation method thereof. Background technique [0002] As one of the most important oil and gas reservoir stimulation technologies, core acidizing experiment plays an important role in the establishment, commissioning, high and stable production of oil and gas reservoirs. The etched form of the rock surface after the acid-rock reaction is related to the type of acid solution, rock type, temperature, pressure, flow rate, amount of acid solution, etc., and is also one of the key factors determining the acidification effect. The acid rock etching experiment and the acid rock reaction mechanism are the scientific basis for optimizing the acid liquid system and optimizing the acid fracturing process. [0003] Conventional acidification static etching experiments use a certain amount of acid solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84
Inventor 赵立强刘平礼袁学芳钟双飞罗志锋李年银赵振峰彭建新杜娟刘飞
Owner SOUTHWEST PETROLEUM UNIV
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