CO2 pressurization metering system and use method

A metering system, CO2 technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of agitator corrosion, pulse, and test simulation functions that cannot be fractured, and achieve stability The effect of injecting functions

Pending Publication Date: 2019-09-17
CHINA HUANENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing fracturing simulation test system in the industry has a single function, generally only capable of hydraulic fracturing, not CO 2 Fracturing test simulation function
Individual fracturing simulation test systems contain CO 2 functionality for frac simulation, but while doing CO 2 When fracturing, there may be the following disadvantages: (1) There are defects in the design of the corresponding chemical reagent addition function. When mixing and outputting the fracturing fluid, the design is relatively simple in terms of pressure control, which leads to fracturing. The output pressure of the liquid is not stable enough, there may be pulses, which will affect the measurement effect and the measurement will be inaccurate
(2) Chemical reagents in CO 2 Insufficient concentration control and metering accuracy in fracturing fluid
(3) There are deficiencies in the stirring and mixing of fracturing fluid, the stirring is not sufficient, the rotation speed cannot be adjusted during stirring, or the stirrer is easily affected by chemical reagents or CO 2 Corrosion
(4) During the experiment, after the rock sample breaks, the output of fracturing fluid cannot be stopped immediately, resulting in waste of experimental samples and even a safety hazard in the experiment
In conclusion, the lack of comprehensive approaches to CO 2 Better control of the fracturing and fracturing process, which brings great inconvenience to the development of fracturing and fracturing experiments

Method used

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  • CO2 pressurization metering system and use method

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] Compared with the conventional true triaxial fracturing simulation equipment that only has the function of hydraulic fracturing, this experimental system focuses on adding CO 2Mixed with chemical reagents, pressurized injection and accurate metering functions, with the help of this system for CO 2 Fracturing injection functions for better control. During the experiment, it is necessary to apply a certain confining pressure to the experimental rock sample with the help of conventional true triaxial fracturing simulation equipment (well known in the industry), which can facilitate better research on fracture initiation pressure and fracturing effect.

[0037] like figure 1 As shown, the present invention provides a CO 2 Boost metering control system, including liquid storage tank 1, first valve 2, mixed liquid metering pump 3, second valve 4, gas stor...

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Abstract

The invention discloses a CO2 pressurization metering system and a use method. The system comprises a liquid storage tank, a mixed liquid metering pump, a gas storage bottle, a refrigerator, a CO2 metering pump, a first piston container and a rock sample, wherein a water outlet of the liquid storage tank is connected with the upper part of the first piston container through the mixed liquid metering pump; the gas storage bottle is used for storing CO2 gas; a gas outlet of the gas storage bottle is connected with the lower part of the first piston container through the refrigerator and the CO2 metering pump sequentially; and a CO2 outlet in the lower part of the first piston container is connected with an inlet of the rock sample. The invention provides a stable experimental system with a CO2 anhydrous fracturing fluid injection function, and a use method.

Description

technical field [0001] The present invention relates to oil and gas development technology or CO 2 Relevant chemical industry, especially involving a CO 2 Boost metering system and method of use. Background technique [0002] Since it is very difficult to exploit low-permeability oil and gas reservoirs directly, through fracturing technology (including hydraulic fracturing, CO 2 Fracturing) has become the most effective means to transform oil and gas reservoirs. CO 2 The research on fracturing technology is a hot topic in the current industry, and the development of a 2 Fracturing, Improved CO 2 Fracturing (CO 2 The multi-functional fracturing simulation test system provides a stable supply of fracturing fluid, and the CO 2 It is particularly important to conduct better systematic research on fracturing initiation pressure and fracturing effect. [0003] The existing fracturing simulation test system in the industry has a single function, generally only capable of hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/12
CPCG01N3/02G01N3/12
Inventor 张健王金意荆铁亚赵文韬张国祥
Owner CHINA HUANENG GRP CO LTD
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