CN103289666A - Automatic-defoaming foam discharging agent for gas well drainage and preparation method thereof - Google Patents
Automatic-defoaming foam discharging agent for gas well drainage and preparation method thereof Download PDFInfo
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- CN103289666A CN103289666A CN2013102175010A CN201310217501A CN103289666A CN 103289666 A CN103289666 A CN 103289666A CN 2013102175010 A CN2013102175010 A CN 2013102175010A CN 201310217501 A CN201310217501 A CN 201310217501A CN 103289666 A CN103289666 A CN 103289666A
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Abstract
The invention belongs to the technical field of gas well foam discharging agents, and particularly relates to an automatic-defoaming foam discharging agent for gas well drainage and a preparation method thereof. The invention solves the problems that the common foam discharging agent has poor foaming property and the foam can not easily disappear quickly after the foam discharging is finished. The technical scheme is as follows: the preparation method comprises the following steps: reacting raw materials fatty acid and hydroxyethyl ethylenediamine in a mol ratio of 1:(1-1.3) at 140+/-10 DEG C in an N2 atmosphere under the action of a water-carrying agent for 4 hours, heating to 220+/-10 DEG C, and reacting for 4 hours to obtain a white solid intermediate product; and dissolving the intermediate product in a tetrahydrofuran solvent, introducing carbon dioxide gas, reacting for 1 hour, filtering, and drying to obtain white solid powder which is the automatic-defoaming foam discharging agent for gas well drainage. The foam discharging agent provided by the invention has the advantages of preparation method, mild reaction conditions and favorable foaming property, can implement quick defoaming after the foam discharging is finished, solves the problem of difficulty in defoaming of the common foam discharging agent after the foam discharging is finished, and thus, has wide application prospects in the field of gas well foam drainage.
Description
Technical field
The invention belongs to gas well foam discharging agent technical field, be specifically related to a kind of gas well draining with automatic froth breaking type foam discharging agent and preparation method thereof.
Background technology
Along with the exploitation of gas well, reservoir pressure constantly reduces, and part is produced well because the fluid-carrying capability difference causes the pit shaft hydrops serious, causes the gas well underproduction even stop-spraying.The foaming water discharge gas production is a kind of water pumping gas production technology that develops rapidly both at home and abroad in recent years, has that equipment is simple, easy construction, cost are low, be suitable for the well depth scope greatly, does not influence advantages such as gas well ordinary production, is widely used in the gas field.Its essence is by the foam discharging agent of annotating in the mineralized water of shaft bottom, stirring by gas flow, foam discharging agent fully contacts with the shaft bottom hydrops, produce a large amount of more stable low-density resistance aqueous foams, foam is taken water and is discharged pit shaft with air-flow from the shaft bottom to ground, reaches the purpose of stable yields, volume increase and prolongation its flush stage.Because most of foam is accompanied by regenerative process, froth breaking was very difficult after a large amount of foams were discharged gas well, had a strong impact on the ordinary production of industrial or agricultural.Usually add defoamer and solve this problem, but construction cost is increased greatly, and claim for eot.At present, also there is not a kind of method of satisfaction to solve the method that bubble row finishes back foam accumulation.
2006 are so far, and Jessop, people such as P.G have reported multiple switching mode tensio-active agent, in the presence of water, and CO
2Reaction can be converted into supercarbonate, and this ionogenic surfactant can change original neutral compound into again by introducing rare gas element (nitrogen or argon gas).According to demand, the activity of this class ionogenic surfactant can be passed through CO
2And switch is regulated.
The present invention utilizes the principle of switch list surface-active agent, difference in conjunction with gas in pit shaft and the air, at the problem of froth breaking difficulty in the last handling process in the foaming water discharge gas production method, design and prepared a series of automatic froth breaking type foam discharging agent HEAIB-R, can reach controlled foaming and froth breaking.
Summary of the invention
The objective of the invention is to develop a kind of gas well draining with automatic froth breaking type foam discharging agent HEAIB-R, can steep row and finish rapid froth breaking in the stable foaming of pit shaft.HEAIB-R is the supercarbonate tensio-active agent, after injecting pit shaft and hydrops mixing, by the stirring of gas flow, produces a large amount of low density resistance aqueous foams at pit shaft, discharges gas well with air-flow, reaches the purpose of getting rid of hydrops; Bubble applies after the worker finishes, and after a large amount of foams are taken out of gas well, contact with air, and reversible reaction takes place HEAIB-R, is decomposed into to hang down surface-active HEAI-R, and foam decomposes rapidly.Therefore this method can will be simplified the conventional foam drainage procedure greatly, improves bubble and applies the work efficiency rate, and it will have broad application prospects in gas well foaming water discharge field.
In order to achieve the above object, the technical solution used in the present invention is as follows:
Gas well draining of the present invention is 2-alkyl-l-hydroxyethyl imidazole beautiful jade supercarbonate with automatic froth breaking type foam discharging agent, its chemical name, and code name is HEAIB-R, and its structural formula is:
Alkyl R is C
9H
19, C
11H
23Or C
13H
27In a kind of.
Gas well draining of the present invention is as follows with the preparation method of automatic froth breaking type foam discharging agent:
(1) for the synthesis of the preparation of the intermediate of 2-alkyl-l-hydroxyethyl imidazole beautiful jade supercarbonate
In the there-necked flask that water trap, thermometer, condensing reflux and whipping appts are housed, be ratio adding lipid acid and the hydroxyethylethylene diamine of 1:1～1.3 according to mol ratio, add 30mL band aqua dimethylbenzene again, in N
2In the atmosphere, under the 130-150 ℃ of condition, it is complete to carry out amidate action water outlet to the water trap, gets the yellow liquid alkylamide; Be warming up to 210-230 ℃, carry out cyclization 4h, form faint yellow semisolid, get intermediate product 2-alkyl-l-hydroxyethyl imidazole beautiful jade code name HEAI-R 3 times with the ether washing.Reaction equation is as follows:
(2) and CO
2Reaction generates the 2-alkyl-l-hydroxyethyl imidazole beautiful jade supercarbonate of both sexes
In the there-necked flask that thermometer, condensing reflux, stirring and diffuser are housed, add above-mentioned product HEAI-R, be dissolved in the tetrahydrofuran (THF) code name THF solvent, feed CO under the room temperature
2, carry out quaterisation and do not separate out to there being white precipitate, to filter and dry white solid powder, i.e. described gas well draining is with automatic froth breaking type foam discharging agent HEAIB-R.Reaction equation is as follows:
Beneficial effect of the present invention: the preparation method of 2-alkyl-l-hydroxyethyl imidazole beautiful jade supercarbonate is easy, and the reaction conditions gentleness does not need product is purified, and greatly reduces production cost; This foam discharging agent is with respect to traditional foam discharging agent, and structure is chain alkyl tetrahydroglyoxaline supercarbonate, contains hydroxyl, good water solubility, and lathering property is good, can stablize foaming in 20-80 ℃ of temperature range, steeps row and finishes the quick froth breaking of back energy in air; This foam discharging agent not only has good compatibleness, also has good corrosion inhibiting ability, the protection oil reservoir; Utilize air to control the switch of foam, environmental protection economy height.
Description of drawings
Fig. 1 is 1H NMR spectrogram (400MHz, the CDCl of 2 – undecyl-l-hydroxyethyl imidazole beautiful jade
3): 0.882 (t, 3H, CH
2CH
3), 1.257 (m, 16H, CH
2(CH
2)
8CH
3), 1.625 (m, 2H, CH
2(CH
2)
10CH
3), 2.181 (t, 2H, CH
2C=N), 2.796 (t, 4H, CH
2NCH
2), 3.377 (t, 2H, C=NCH
2), 3.676 (t, 2H, CH
2OH), 5.957 (– OH).
Fig. 2 is the infrared spectrum (KBr) of 2 – undecyl-l-hydroxyethyl imidazole beautiful jade, wherein 1641.12cm
-1Be the C=N double bond absorption peak.
Embodiment
Describe the beneficial effect of the invention process process and generation below with specific embodiment in detail, be intended to help the reader to understand essence of the present invention and characteristics better, but not as the restriction to this case practical range.
In the there-necked flask that water trap, thermometer, whipping appts are housed, accurately take by weighing the n-capric acid of 8.6g, be 1:1 according to n-capric acid and hydroxyethylethylene diamine mol ratio, 1:1.1,1:1.2, the ratio of 1:1.3 adds hydroxyethylethylene diamine, add 30mL band aqua dimethylbenzene again, in N
2In the atmosphere, 140 ± 10 ℃ to react to the water trap water outlet complete, is-0.1Mpa that temperature is that 70 ℃ of rotary evaporations get the yellow liquid alkylamide at pressure with gained solution; Be warming up to 220 ± 10 ℃ and continue reaction 4h, form faint yellow semisolid, get intermediate product 2-alkyl-l-hydroxyethyl imidazole beautiful jade 3 times with the ether washing; Above-mentioned product is dissolved in the tetrahydrofuran solvent, feeds CO under the room temperature
2Reaction is not separated out to there being white precipitate, filter, dry the white solid powder, i.e. described gas well draining is with automatic froth breaking type foam discharging agent HEAIB-9, the productive rate under the different mol ratio is respectively 61.3,64.1,70.2,69.3,68.1%.
Embodiment 2
In the there-necked flask that water trap, thermometer, whipping appts are housed, accurately take by weighing the n-capric acid of 10g, be 1:1 according to lauric acid and hydroxyethylethylene diamine mol ratio, 1:1.1,1:1.2, the ratio of 1:1.3 adds hydroxyethylethylene diamine, add 30mL band aqua dimethylbenzene again, in N
2In the atmosphere, 140 ± 10 ℃ to react to the water trap water outlet complete, is-0.1Mpa that temperature is that 70 ℃ of rotary evaporations get the yellow liquid alkylamide at pressure with gained solution; Be warming up to 220 ± 10 ℃ and continue reaction 4h, form faint yellow semisolid, get intermediate product 2-alkyl-l-hydroxyethyl imidazole beautiful jade 3 times with the ether washing; Above-mentioned product is dissolved in the tetrahydrofuran solvent, feeds CO under the room temperature
2Reaction is not separated out to there being white precipitate, filter, dry the white solid powder, i.e. described gas well draining is with automatic froth breaking type foam discharging agent HEAIB-11, the productive rate under the different mol ratio is respectively 60.8,73.8,83.2,83.3%.
Embodiment 3
In the there-necked flask that water trap, thermometer, whipping appts are housed, accurately take by weighing the TETRADECONIC ACID of 11.4g, be 1:1 according to TETRADECONIC ACID and hydroxyethylethylene diamine mol ratio, 1:1.1,1:1.2, the ratio of 1:1.3 adds hydroxyethylethylene diamine, add 30mL band aqua dimethylbenzene again, in N
2In the atmosphere, 140 ± 10 ℃ to react to the water trap water outlet complete, is-0.1Mpa that temperature is that 70 ℃ of rotary evaporations get the yellow liquid alkylamide at pressure with gained solution; Be warming up to 220 ± 10 ℃ and continue reaction 4h, form faint yellow semisolid, get intermediate product 2-alkyl-l-hydroxyethyl imidazole beautiful jade 3 times with the ether washing; Above-mentioned product is dissolved in the tetrahydrofuran solvent, feeds CO under the room temperature
2Reaction is not separated out to there being white precipitate, filter, dry the white solid powder, i.e. described gas well draining is with automatic froth breaking type foam discharging agent HEAIB-13, the productive rate under the different mol ratio is respectively 62.5,70.3,74.8,76.3%.
The test example
The content of three aspects is mainly carried out in the evaluation of foam discharging agent, namely the foam discharging agent latherability, surely steep the evaluating and measuring of ability and froth breaking speed.
This paper adopts Waring blender method to estimate latherability, froth stability and the froth breaking ability of switch list surface-active agent.Under 30 ℃, configuration 2gL
-1HEAIB aqueous solution 100mL, after 1,000rpm stirs 60s, respectively at secluding air (wellbore hole simulator environment) be exposed under two kinds of environment of air (environment after the analog bubble row end), measure its initial foam height (H
0), the foam height (H behind the 5min
5) and analyse liquid transformation period (t
1/2), and the time of foam completely dissolve (t), each sample repeats 3 times and averages.
As shown in table 1.HEAIB-R has formed stability foam preferably under the secluding air condition, foam stability can be better; Be exposed in the air, foam rapidly disappears.Wherein HEAIB-11 is under the secluding air condition, initial foam volume H
0Be 985mm, analyse liquid transformation period t
1/2aBe 91s; Be exposed in the air t
1/2Be 45s, the completely dissolve of 1.5min foam.This shows that HEAIB-R, especially HEAIB-11 have good lathering property and foam stability energy as a kind of automatic froth breaking type foam discharging agent, and quick froth breaking ability.
The latherability of HEAIB-R under table 1. room temperature, surely steep ability and froth breaking speed
Annotate: in the above-mentioned experiment, the salinity of used stratum Simulated Water is 150g/L; The a-secluding air, b-is exposed in the air.
Above-described embodiment is the preferred embodiment of the present invention, but embodiments of the present invention are not restricted to the described embodiments, and the change that other any the present invention of not deviating from does all should be the substitute mode of equivalence, is included within protection scope of the present invention.
Claims (2)
1. a gas well draining is characterized in that with the preparation method of automatic froth breaking type foam discharging agent the title of this foam discharging agent is 2-alkyl-l-hydroxyethyl imidazole beautiful jade supercarbonate, and code name is HEAIB-R, and its structural formula is:
Alkyl R is C
9H
19, C
11H
23Or C
13H
27In a kind of.
2. gas well draining as claimed in claim 1 is characterized in that with the preparation method of automatic froth breaking type foam discharging agent this method comprises:
(1) for the synthesis of the preparation of the intermediate of 2-alkyl-l-hydroxyethyl imidazole beautiful jade supercarbonate
In the there-necked flask that water trap, thermometer, condensing reflux and whipping appts are housed, be ratio adding lipid acid and the hydroxyethylethylene diamine of 1:1～1.3 according to mol ratio, add 30mL band aqua dimethylbenzene again, in N
2In the atmosphere, under the 130-150 ℃ of condition, it is complete to carry out amidate action water outlet to the water trap, gets the yellow liquid alkylamide; Be warming up to 210-230 ℃, carry out cyclization 4h, form faint yellow semisolid, get intermediate product 2-alkyl-l-hydroxyethyl imidazole beautiful jade code name HEAI-R 3 times with the ether washing.Reaction equation is as follows:
(2) and CO
2Reaction generates the 2-alkyl-l-hydroxyethyl imidazole beautiful jade supercarbonate of both sexes
In the there-necked flask that thermometer, condensing reflux, stirring and diffuser are housed, add above-mentioned product HEAI-R, be dissolved in the tetrahydrofuran (THF) code name THF solvent, feed CO under the room temperature
2, carry out quaterisation and do not separate out to there being white precipitate, filter and the dry white solid powder that gets i.e. described gas well draining controllable release foam discharging agent HEAIB-R.Reaction equation is as follows:
。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109401743A (en) * | 2017-08-16 | 2019-03-01 | 中国石油化工股份有限公司 | Salt tolerant acidproof water pumping gas production foam discharging agent composition and the preparation method and application thereof |
| CN109679608A (en) * | 2017-10-18 | 2019-04-26 | 中国石油化工股份有限公司 | High temperature resistant acid resistant form foaming water discharge agent and preparation method and application |
| CN110791273A (en) * | 2019-10-15 | 2020-02-14 | 东营施普瑞石油工程技术有限公司 | Gas well foam scrubbing agent composition, preparation method and application thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109401743A (en) * | 2017-08-16 | 2019-03-01 | 中国石油化工股份有限公司 | Salt tolerant acidproof water pumping gas production foam discharging agent composition and the preparation method and application thereof |
| CN109401743B (en) * | 2017-08-16 | 2021-05-11 | 中国石油化工股份有限公司 | Foam scrubbing agent composition for salt-resistant acid-resistant water drainage and gas production and preparation method and application thereof |
| CN109679608A (en) * | 2017-10-18 | 2019-04-26 | 中国石油化工股份有限公司 | High temperature resistant acid resistant form foaming water discharge agent and preparation method and application |
| CN109679608B (en) * | 2017-10-18 | 2021-02-09 | 中国石油化工股份有限公司 | High-temperature-resistant acid-resistant foam drainage agent, preparation method and application |
| CN110791273A (en) * | 2019-10-15 | 2020-02-14 | 东营施普瑞石油工程技术有限公司 | Gas well foam scrubbing agent composition, preparation method and application thereof |
| CN110791273B (en) * | 2019-10-15 | 2021-10-26 | 东营施普瑞石油工程技术有限公司 | Gas well foam scrubbing agent composition, preparation method and application thereof |
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Application publication date: 20130911 |