CN212202022U - Online injection device of oil field carbon dioxide thickener - Google Patents
Online injection device of oil field carbon dioxide thickener Download PDFInfo
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- CN212202022U CN212202022U CN202020919355.1U CN202020919355U CN212202022U CN 212202022 U CN212202022 U CN 212202022U CN 202020919355 U CN202020919355 U CN 202020919355U CN 212202022 U CN212202022 U CN 212202022U
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- carbon dioxide
- injection
- thickener
- injection pipeline
- pipeline
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Abstract
The utility model relates to an online injection device of oil field carbon dioxide thickener mainly aims at the ground process problem when annotating carbon dioxide thickener control gas drive fluidity. An online injection device for an oilfield carbon dioxide thickener comprises an injection wellhead, wherein a casing and an oil pipe are sequentially arranged in the injection wellhead, and the oil pipe is positioned in the casing; the device also comprises an injection pipeline extending into the oil pipe; the carbon dioxide injection pipeline and the thickening agent injection pipeline are mixed and then connected with each other; the carbon dioxide injection pipeline is sequentially provided with a carbon dioxide liquid source, a temperature control device and a carbon dioxide injection pump, and the thickening agent injection pipeline is sequentially provided with a thickening agent source and a metering pump. The utility model discloses with the higher thickener of viscosity with drip formula and carbon dioxide homogeneous mixing, fully dissolve in the injection pipeline, the thickener is carried high-speed highly compressed carbon dioxide and gets into the injection well head fast, has solved the problem that the thickener pours into the difficulty.
Description
Technical Field
The utility model relates to an online injection device of oil field carbon dioxide thickener mainly aims at the ground process problem when annotating carbon dioxide thickener control gas drive fluidity.
Background
The carbon dioxide injection for oil displacement can expand the volume of crude oil, reduce the viscosity of the crude oil and reduce the interfacial tension, and is one of the accepted effective methods for improving the recovery ratio of oil reservoirs at home and abroad. However, due to the unfavorable mobility ratio between carbon dioxide and crude oil and the heterogeneity of the oil reservoir, the carbon dioxide is easy to escape along a relatively high permeability layer or a crack in the matrix, and the gas flooding front advances too fast, so that the sweep efficiency and the oil flooding efficiency are reduced.
Thickening and viscosifying by adding one or more chemical agents to carbon dioxide is the most direct method of reducing carbon dioxide fluidity. The ideal carbon dioxide thickener should have amphiphilic property, the carbon dioxide-philic group can increase the solubility of the thickener, and the carbon dioxide-phobic group can effectively increase the viscosity through intermolecular self-assembly. The thickeners which are intensively studied at home and abroad comprise four thickeners of alkanes, cosolvents, fluorine-containing compounds and fluorine-free compounds.
At present, the carbon dioxide thickening agent has certain application in foam fracturing fluid field construction, but is not used in a gas flooding fluidity control field test. In any case, the increase in viscosity of the thickener inevitably causes a problem of difficulty in injection. The phase state of the carbon dioxide in the ground pipeline is easy to change, and how to scientifically and reasonably inject the thickening agent into the carbon dioxide circulation pipeline uniformly and then the thickening agent is injected into a shaft conveniently and quickly is very worth paying attention. In order to make practice of injecting the thickening agent to control the carbon dioxide flooding fluidity in a mine, research and development of a carbon dioxide thickening agent ground injection device are necessary.
Disclosure of Invention
The utility model discloses aim at to above-mentioned problem, provide an oil field carbon dioxide thickener ground injection device.
The technical scheme of the utility model lies in:
an online injection device for an oilfield carbon dioxide thickener comprises an injection wellhead, wherein a casing and an oil pipe are sequentially arranged in the injection wellhead, and the oil pipe is positioned in the casing; the device also comprises an injection pipeline extending into the oil pipe; the carbon dioxide injection pipeline and the thickening agent injection pipeline are mixed and then connected with each other; the carbon dioxide injection pipeline is sequentially provided with a carbon dioxide liquid source, a temperature control device and a carbon dioxide injection pump, and the thickening agent injection pipeline is sequentially provided with a thickening agent source and a metering pump.
A second electromagnetic valve and a second flow transmitter are arranged on a carbon dioxide injection pipeline between the carbon dioxide liquid source and the temperature control device, and the second electromagnetic valve is electrically connected with the second flow transmitter; and two ends of the carbon dioxide injection pump are also provided with return pipelines, the return pipelines are provided with third electromagnetic valves, the carbon dioxide injection pipeline behind the carbon dioxide injection pump is provided with a pressure transmitter, and the third electromagnetic valves are electrically connected with the pressure transmitter.
And a first electromagnetic valve is arranged on a thickening agent injection pipeline between the thickening agent source and the metering pump, and the first electromagnetic valve is connected with a first flow transmitter.
The temperature control device is a carbon dioxide electric heater and a temperature controller connected with the carbon dioxide electric heater.
The carbon dioxide injection pipeline is also provided with a carbon dioxide liquid supply valve and a one-way valve; the thickener injection pipeline is also provided with a thickener liquid supply valve and a one-way valve.
The carbon dioxide injection pipeline and the thickening agent injection pipeline are connected with the injection pipeline through a tee joint.
And a sampling valve is arranged on the injection pipeline.
The technical effects of the utility model reside in that:
the utility model discloses with the higher thickener of viscosity with drip formula and carbon dioxide homogeneous mixing, fully dissolve in the injection pipeline, the thickener is carried high-speed highly compressed carbon dioxide and gets into the injection well head fast, has solved the problem that the thickener pours into the difficulty.
Drawings
Figure 1 is the utility model discloses the online injection device's of oil field carbon dioxide thickener structural schematic diagram.
Reference numerals: 1-thickener liquid supply valve, 2-carbon dioxide liquid supply valve, 3-electric heater, 4-temperature controller, 5-injection wellhead, 6-carbon dioxide injection pump, 7-first electromagnetic valve, 8-first flow transmitter, 9-one-way valve, 10-metering pump, 11-casing, 12-oil pipe, 13-sampling valve, 14-pressure transmitter, 15-second electromagnetic valve, 16-second flow transmitter, 17-third electromagnetic valve.
Detailed Description
Example 1
An online injection device for an oilfield carbon dioxide thickener comprises an injection wellhead 5, wherein a casing 11 and an oil pipe 12 are sequentially arranged in the injection wellhead 5, and the oil pipe 12 is positioned in the casing 11; also includes an injection line extending into the tubing 12; the carbon dioxide injection pipeline and the thickening agent injection pipeline are mixed and then connected with each other; the carbon dioxide injection pipeline is sequentially provided with a carbon dioxide liquid source, a temperature control device and a carbon dioxide injection pump 6, and the thickening agent injection pipeline is sequentially provided with a thickening agent source and a metering pump 10.
The phase of carbon dioxide in the surface pipeline is highly susceptible to temperature and pressure, and the phase directly affects the solubility properties of the thickener. The carbon dioxide in the carbon dioxide injection line is controlled by temperature and pressure to ensure that the phase state is in a favorable interval. The thickener is precisely injected into the injection line through the thickener injection line through the metering pump 10 and into the injection wellhead 5 along with the carbon dioxide. The risk of difficult injection or high injection pressure when injecting the thickener alone is avoided.
Example 2
On the basis of embodiment 1, the method further comprises the following steps:
a second electromagnetic valve 15 and a second flow transmitter 16 are arranged on a carbon dioxide injection pipeline between the carbon dioxide liquid source and the temperature control device, and the second electromagnetic valve 15 is electrically connected with the second flow transmitter 16; and two ends of the carbon dioxide injection pump 6 are also provided with return pipelines, the return pipelines are provided with third electromagnetic valves 17, the carbon dioxide injection pipeline behind the carbon dioxide injection pump 6 is provided with a pressure transmitter 14, and the third electromagnetic valves 17 are electrically connected with the pressure transmitter 14. Before liquid carbon dioxide provided by a carbon dioxide liquid source enters the injection wellhead 5, the injection amount in unit time is set through a second flow transmitter 16, and the on-off of a second electromagnetic valve 15 is controlled; the temperature control device heats the liquid carbon dioxide to a set temperature; and then the pressure is increased by a carbon dioxide injection pump 6, the pressure of the carbon dioxide in the carbon dioxide injection pipeline is controlled by a pressure transmitter 14 and a third electromagnetic valve 17, and the phase state of the carbon dioxide is controlled by controlling the temperature and the pressure of the carbon dioxide.
A first electromagnetic valve 7 is arranged on a thickening agent injection pipeline between the thickening agent source and the metering pump 10, and the first electromagnetic valve 7 is connected with a first flow transmitter 8. Before the thickener provided by the thickener source enters the injection wellhead 5, the injection amount in unit time is set through a first flow transmitter 8, and the on-off of a first electromagnetic valve 7 is controlled; then the thickening agent is more accurately conveyed by a metering pump 10, is injected into an injection pipeline in a dropping mode, is uniformly mixed with carbon dioxide in the injection pipeline, is fully dissolved and then enters an injection wellhead 5.
The temperature control device is a carbon dioxide electric heater 3 and a temperature controller 4 connected with the carbon dioxide electric heater 3. The carbon dioxide injection pipeline is also provided with a carbon dioxide liquid supply valve 2 and a one-way valve 9; the thickener injection line is also provided with a thickener liquid supply valve 1 and a check valve 9. The one-way valve 9 is used for preventing high-pressure fluid in the shaft from flowing back out of the shaft and flowing back into a pipeline.
Example 3
On the basis of embodiment 2, the method further comprises the following steps:
the carbon dioxide injection pipeline and the thickening agent injection pipeline are connected with the injection pipeline through a tee joint. The injection line is provided with a sampling valve 13 for sampling and analyzing the mixture in the injection line.
The utility model relates to a device is the product sold in the market. For example, the model of the carbon dioxide liquid supply valve 2 is a DJ41Y type stop valve, the model of the thickener liquid supply valve 1 is a D341X type butterfly valve, the model of the carbon dioxide injection pump 6 is 3RB45-1/20, the model of the metering pump 10 is SJM2499/0.5 III, the models of the first flow transmitter 8 and the second flow transmitter 16 are WT2000-5E1S2T, the model of the pressure transmitter 14 is CTS615, the models of the first electromagnetic valve 7, the second electromagnetic valve 15 and the third electromagnetic valve 17 are ZC51-20HB, the model of the check valve 9 is H44W-16P, the model of the electric heater 3 is XTGD, and the model of the temperature controller 4 is a WSJ-340 series electronic temperature controller.
Claims (7)
1. An online injection device for an oilfield carbon dioxide thickener comprises an injection wellhead (5), wherein a casing (11) and an oil pipe (12) are sequentially arranged in the injection wellhead (5), and the oil pipe (12) is positioned in the casing (11); also comprises an injection pipeline extending into the oil pipe (12); the method is characterized in that: the carbon dioxide injection pipeline and the thickening agent injection pipeline are mixed and then connected with each other; and the carbon dioxide injection pipeline is sequentially provided with a carbon dioxide liquid source, a temperature control device and a carbon dioxide injection pump (6), and the thickening agent injection pipeline is sequentially provided with a thickening agent source and a metering pump (10).
2. The on-line injection device of the oilfield carbon dioxide thickener according to claim 1, wherein: a second electromagnetic valve (15) and a second flow transducer (16) are arranged on a carbon dioxide injection pipeline between the carbon dioxide liquid source and the temperature control device, and the second electromagnetic valve (15) is electrically connected with the second flow transducer (16); and two ends of the carbon dioxide injection pump (6) are also provided with return pipelines, the return pipelines are provided with third electromagnetic valves (17), the carbon dioxide injection pipelines behind the carbon dioxide injection pump (6) are provided with pressure transmitters (14), and the third electromagnetic valves (17) are electrically connected with the pressure transmitters (14).
3. The on-line injection device of the oilfield carbon dioxide thickener according to claim 2, wherein: a first electromagnetic valve (7) is arranged on a thickening agent injection pipeline between the thickening agent source and the metering pump (10), and the first electromagnetic valve (7) is connected with a first flow transmitter (8).
4. The on-line injection device of the oilfield carbon dioxide thickener according to claim 3, wherein: the temperature control device is a carbon dioxide electric heater (3) and a temperature controller (4) connected with the carbon dioxide electric heater (3).
5. The on-line injection device of the oilfield carbon dioxide thickener according to claim 4, wherein: the carbon dioxide injection pipeline is also provided with a carbon dioxide liquid supply valve (2) and a one-way valve (9); the thickener injection pipeline is also provided with a thickener liquid supply valve (1) and a one-way valve (9).
6. The on-line injection device of the oilfield carbon dioxide thickener according to claim 5, wherein: the carbon dioxide injection pipeline and the thickening agent injection pipeline are connected with the injection pipeline through a tee joint.
7. The on-line injection device of the oilfield carbon dioxide thickener according to claim 6, wherein: and a sampling valve (13) is arranged on the injection pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020919355.1U CN212202022U (en) | 2020-05-27 | 2020-05-27 | Online injection device of oil field carbon dioxide thickener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020919355.1U CN212202022U (en) | 2020-05-27 | 2020-05-27 | Online injection device of oil field carbon dioxide thickener |
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| Publication Number | Publication Date |
|---|---|
| CN212202022U true CN212202022U (en) | 2020-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020919355.1U Expired - Fee Related CN212202022U (en) | 2020-05-27 | 2020-05-27 | Online injection device of oil field carbon dioxide thickener |
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| Country | Link |
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| CN (1) | CN212202022U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187451A (en) * | 2021-06-11 | 2021-07-30 | 长江大学 | Thickened carbon dioxide displacement of reservoir oil visual analogue means |
-
2020
- 2020-05-27 CN CN202020919355.1U patent/CN212202022U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187451A (en) * | 2021-06-11 | 2021-07-30 | 长江大学 | Thickened carbon dioxide displacement of reservoir oil visual analogue means |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201222 |
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| CF01 | Termination of patent right due to non-payment of annual fee |