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Device and method for measuring internal contact angle of high-temperature and high-pressure capillary tube

A high-temperature, high-pressure, measuring device technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as inability to meet test requirements, and achieve the effect of wide measurement range

Active Publication Date: 2014-01-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can only meet the test under the conditions of simulating normal pressure, macroscopic scale, and single type of gas medium. However, under actual reservoir conditions, the internal pore size of the core is micron-scale, the internal pressure is high pressure and high temperature, and there are many types of internal gas medium.
Therefore, the existing contact angle test methods have great limitations and cannot meet the current CO 2 Test Requirements for Mechanism Study of Miscible Flooding

Method used

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  • Device and method for measuring internal contact angle of high-temperature and high-pressure capillary tube
  • Device and method for measuring internal contact angle of high-temperature and high-pressure capillary tube

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Experimental program
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Embodiment approach 1

[0035] like figure 1 As shown, the present invention provides a high-temperature and high-pressure capillary internal contact angle measurement device, which includes a steel body 1 and a capillary 2 . Wherein: the steel body 1 has a through hole 11, and the two ends of the through hole 11 are respectively sealed with observation windows 12; one end of the capillary 2 is pierced in the through hole 11 of the steel body 1, and the other end is injected through the first fluid. The pipeline 31 is connected to a first fluid injection pump 3 ; the second fluid injection pump 4 is connected to a second fluid injection pipeline 41 , and the second fluid injection pipeline 41 extends into the through hole 11 of the steel body 1 .

[0036] Specifically, the steel body 1 is generally cylindrical, with a through hole 11 opened in the middle, and a transparent observation window 12 is respectively provided at both ends of the steel body 1, and the observation window 12 is used to allow t...

Embodiment approach 2

[0048] like Figure 1-2 As shown, the present invention provides a method for measuring the internal contact angle of a high-temperature and high-pressure capillary tube. The high-temperature and high-pressure capillary internal contact angle measuring method adopts the above-mentioned high-temperature and high-pressure capillary internal contact angle measuring device. The structure, working principle and beneficial effects are the same as those of Embodiment 1, and will not be repeated here. The high temperature and high pressure capillary internal contact angle measurement method comprises the steps:

[0049] a) Fill fluid into the first fluid injection pump 3, and fill gas into the second fluid injection pump 4;

[0050] b) Inject the fluid into a capillary 2 through the first fluid injection pump 3, and the capillary 2 extends into a through hole 11 of a steel body 1, and the two ends of the through hole 11 are respectively sealed with observation windows 12. Inject the...

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Abstract

The invention discloses a device and method for measuring an internal contact angle of a high-temperature and high-pressure capillary tube. The device comprises a steel body, the capillary tube and a second fluid injecting pump, wherein the steel body is provided with a through hole, and observation windows are sealed at two ends of the through hole respectively; one end of the capillary tube is arranged in the through hole of the steel body in a penetrating manner, and the other end of the capillary tube is connected with a first fluid injecting pump through a first fluid injecting pipeline; the second fluid injecting pump is connected with a second fluid injecting pipeline, and the second fluid injecting pipeline extends into the through hole of the steel body. According to the device and method for measuring the internal contact angle of the high-temperature and high-pressure capillary tube, various gases can be measured, capillary tubes with different internal diameters can be freely replaced, and the purpose of measuring the contact angle of a gas-liquid meniscus surface under the oil deposit condition is realized.

Description

technical field [0001] The invention relates to a measuring device and a measuring method for a contact angle, in particular to a measuring device and a measuring method for a high-temperature and high-pressure capillary inner contact angle in an oil reservoir physics experiment. Background technique [0002] In the research experiment of enhanced oil recovery in petroleum development, the wettability of rock-fluid system is the macroscopic average representation of the microscopic heterogeneous wettability characteristics of porous media. The rock pore surface has a tendency to preferentially wet a certain fluid, which leads to various macroscopic wettability conditions. Wettability controls capillary pressure, relative wetting behavior, displacement efficiency and ultimate recovery. The main parameter characterizing the wettability is the size of the contact angle. [0003] In the prior art, wettability measurement methods mainly include droplet method and hanging plate ...

Claims

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Application Information

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IPC IPC(8): G01N13/00
Inventor 秦积舜张可李实马德胜陈兴隆俞宏伟
Owner PETROCHINA CO LTD
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