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A high temperature and high pressure core imbibition test device and method

A high-temperature, high-pressure, experimental device technology, applied in the direction of material absorption and weighing, can solve problems such as poor precision, strong capillary force, and small reservoir pore throats, and achieve the effect of accurate test results and simple operation

Active Publication Date: 2019-06-21
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the tight reservoirs and poor matrix permeability of this type of reservoir, the adaptability of conventional mining technology is poor. At the same time, this type of reservoir has small pore throats and strong capillary force. Therefore, oil-water displacement through imbibition by using capillary force is the key The important mechanisms and means of this type of reservoir
[0003] At present, the experimental research on imbibition oil recovery is mostly carried out under normal pressure conditions using equipment such as glass imbibition bottles, which is quite different from the high temperature and high pressure environment of the actual reservoir, and the reliability of the experiment is difficult to guarantee.
In addition, the measurement of the amount of oil absorbed by the volumetric method is also less accurate due to the small oil output and is easily affected by the wall effect of the crude oil on the wall of the container.
In addition, there is an experimental method to measure the amount of oil absorbed by the mass method, but when the relevant equipment realizes real-time continuous measurement under high temperature and high pressure conditions, there are problems such as complex equipment and facilities or low temperature and pressure resistance strength.

Method used

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  • A high temperature and high pressure core imbibition test device and method
  • A high temperature and high pressure core imbibition test device and method
  • A high temperature and high pressure core imbibition test device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, this embodiment provides a high-temperature and high-pressure core imbibition experimental device, which mainly includes three parts: an imbibition test system, a pressure supply system and a temperature control system, wherein:

[0039] The imbibition test system comprises an imbibition chamber housing 3, a test rock core 6 and a test cylinder, the cavity in the imbibition chamber housing 3 is an imbibition chamber, the test rock core 6 and the test cylinder are placed in the imbibition chamber, and the test cylinder includes a cylinder body 24 and the piston 23 located in the cylinder body, the test rock core 6 is suspended on the bottom of the piston 23, and the cylinder body 24 is connected with the osmosis chamber housing 3 through the communication pipeline 20;

[0040] The pressure supply system includes a liquid storage tank 27, a constant flow pump 15, and an intermediate container 17 connected in sequence. The intermediate container ...

Embodiment 2

[0047]The high temperature and high pressure core imbibition test device as described in Example 1 is different in that: the test core 6 is connected to the piston through a hook. The bottom end of the piston 23 is connected with a piston hook 22, and the top of the test rock core 6 is connected with a rock core hook 21. The rock core hook 21 and the piston hook 22 are hooked together, so that different test rock cores can be easily replaced, and different experiments are carried out conveniently.

Embodiment 3

[0049] A kind of method that carries out rock core imbibition experiment under high temperature and high pressure environment, utilizes the experimental device described in embodiment 1, comprises the following steps:

[0050] (1) Prepare experimental materials: Prepare multiple experimental rock core samples for backup, test and record the basic parameters of the rock core samples, the basic parameters include porosity and permeability, and carry out the saturation of the corresponding medium for the rock core samples according to the experimental purpose (can be established Bound water, or only saturated simulated oil); according to the requirements of the experiment, prepare different imbibed liquids (the permeated liquid can be selected from different salinity aqueous solutions, surfactant solutions, biological enzyme solutions);

[0051] (2) Connect the experimental device: hang the rock core sample in step (1) on the bottom of the piston, connect the heating port to the t...

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Abstract

The invention relates to a high temperature and high pressure core imbibition experimental device and method. The device comprises an imbibition test system, a pressure supply system and a temperaturecontrol system. The method comprises: suspending a core in the imbibition test system, simulating different high temperature and high pressure environments in the imbibition test system through a pressure supply system and a temperature control system and carrying out imbibition test study on the core in the different high temperature and high pressure environments. The core imbibition experimental device is effectively used for core imbibition tests in high temperature and high pressure environments. The device can well simulate the high temperature and high pressure imbibition process of the core in the reservoir environment. Through the experimental method, the pressure difference between the upper and lower parts of the test cylinder piston is read and is converted into the real-timequality of the tested core. The whole experimental method is easy to operate and the test result is accurate. The device and method provide accurate data for analysis of core imbibition experiment results in high temperature and high pressure environments.

Description

technical field [0001] The invention relates to a high-temperature and high-pressure rock core imbibition experiment device and method, and belongs to the technical field of oil-gas field development and imbibition recovery. Background technique [0002] The development scale of unconventional oil and gas resources such as tight oil and gas reservoirs is expanding day by day, and its efficient development technology is a hot spot in current research. Due to the tight reservoirs and poor matrix permeability of this type of reservoir, the adaptability of conventional mining technology is poor. At the same time, this type of reservoir has small pore throats and strong capillary force. Therefore, oil-water displacement through imbibition by using capillary force is the key Important mechanism and means of this type of reservoir. [0003] At present, the experimental research on oil recovery by imbibition is mostly carried out under normal pressure conditions using equipment suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 黄飞飞蒲春生谷潇雨裴泽吴飞鹏刘静陆雷超姜璐晏焕峰王凯
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)