CN109681172B - Method for discharging liquid and producing gas by adopting solid foam discharging agent composition - Google Patents
Method for discharging liquid and producing gas by adopting solid foam discharging agent composition Download PDFInfo
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- CN109681172B CN109681172B CN201710969678.4A CN201710969678A CN109681172B CN 109681172 B CN109681172 B CN 109681172B CN 201710969678 A CN201710969678 A CN 201710969678A CN 109681172 B CN109681172 B CN 109681172B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
Abstract
The invention relates to a method for discharging liquid and producing gas by adopting a solid foam discharging agent composition. The method mainly solves the problems that the yield of the gas well is reduced, even the gas well stops spraying and the liquid foam discharging agent is difficult to fill due to excessive liquid accumulation in the development process of the existing acid gas well. The invention adopts a liquid drainage gas production method, which comprises the following steps: 1) throwing the foam scrubbing agent composition into an aqueous gas well; 2) contacting the foam scrubbing composition with a gas and water or oil-water mixture in an aqueous gas well to form a foamed fluid, and then lifting the foamed fluid to the surface; the solid foam discharging agent composition comprises the following components: 1 part of alkylamine having a general molecular formula shown in formula (I); 0.1-50 parts of a long-chain polyether nitrogen-containing compound with a molecular general formula shown in a formula (II); 0.2-100 parts of solid filler; the technical scheme of 0-0.5 part of the adhesive well solves the problem and can be used in the drainage and gas production process of a gas well.
Description
Technical Field
The invention relates to a method for discharging liquid and producing gas by adopting a solid foam discharging agent composition, in particular to a method for discharging liquid and producing gas by adopting a solid foam discharging agent composition in an acid gas well.
Background
With the enhancement of the exploitation strength of the gas field, the water output of the gas field becomes a key problem restricting the normal production of the gas well. Foam drainage gas production is a drainage gas production technology which is rapidly developed at home and abroad in recent years, and has the advantages of simple equipment, convenience in construction, low cost, wide applicable well depth range, no influence on normal production of gas wells and the like. Foam drainage is to inject foam drainage agent into a well through an oil pipe or an oil casing ring, and foam with certain stability is generated under the stirring of airflow. The liquid phase slipped and deposited in the pipe is changed into foam, the relative density of fluid at the lower part in the pipe is changed, and the continuously produced gas phase displacement foam flows out of the shaft, so that the accumulated liquid in the shaft is discharged, and the purposes of water drainage and gas production are achieved.
The preparation of the foam scrubbing agent is started from the sixties of the last century abroad, and surfactants such as sulfonate, benzene sulfonate, alkylphenol polyoxyethylene and the like are mostly selected. At present, most of foam discharging agents for water drainage and gas production adopt a multi-component compound system, and in order to enhance the stability of single foam, auxiliaries such as alkali, alcohol, polymers, alkanolamide and the like are usually added into a formula to form reinforced foam. US20120279715 reports a foam fluid for increasing oil yield by recovering gas in a gas well, which is an amido group-containing quaternary ammonium salt surfactant having foam discharging and sterilizing functions, and a hydrophobic chain is a hydrophobic segment in substituted naphthalene ring, benzene ring or natural oil ester, so that the foam fluid has strong chlorine resistance and condensate oil resistance, and also has good corrosion inhibition performance. However, since the molecular structure contains an amide group which is sensitive to high temperature, the compound is easily hydrolyzed under acidic conditions.
The foam water discharging agent is mainly an aqueous agent, has the limitation of a plurality of factors such as transportation, storage and the like, and is troublesome to fill on site. CN105062453A discloses a solid foam drainage agent for gas fields and a preparation method thereof, the raw materials comprise sodium dodecyl sulfate, alkylphenol polyoxyethylene, polyacrylamide, trisodium citrate and thiourea, and the solid foam drainage agent has good foam drainage performance. However, sodium dodecyl sulfate contains a sulfate bond, and the temperature resistance is insufficient.
Disclosure of Invention
The invention aims to solve the technical problems that the yield of an existing acid gas well is reduced, even the gas well stops spraying and liquid filling is difficult due to excessive liquid loading in the development process of the existing acid gas well, and provides a method for discharging liquid and producing gas by adopting a solid foam discharging agent composition, in particular a method for discharging liquid and producing gas by adopting the solid foam discharging agent composition in the acid gas well.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a method for discharging liquid and producing gas by adopting a solid foam discharging agent composition comprises the following steps:
(1) feeding the solid foam-scrubbing agent composition into an aqueous gas well;
(2) contacting the solid foam-drain composition with gas and water or a gas and oil-water mixture in an aqueous gas well to form a foam fluid, and then lifting the foam fluid to the surface;
the solid foam scrubbing agent composition comprises the following components in parts by weight:
(1)1 part of alkylamine;
(2) 0.1-50 parts of long-chain polyether nitrogen-containing compound
(3) 0.2-100 parts of solid filler;
(4)0 to 0.5 parts of adhesive.
In the above technical solution, the molecular general formula of the alkylamine is preferably:
wherein R is1Is C6～C16Any one of the alkyl groups of (1).
In the above technical solution, the molecular general formula of the long-chain polyether nitrogen-containing compound is preferably:
wherein R is1Is C10～C26Fatty radical or C of10～C26An aromatic group of (a); y is 0-20, and z is 0-60; r4、R5Is independently selected from C1～C5Alkyl of (C)1～C5Any one of the substituted alkyl groups of (a); r6、R7Is independently selected from C1～C5Alkylene group of (a), substituted alkylene group ofThe method is as follows; y is selected from anionic groups which render the molecule of formula (II) electrically neutral; further, R1Preferably C10～C20Alkyl of (C)10～C20Of an alkylbenzene of, R7Preferably C2H4Or C3H6Z is preferably greater than 0;
in the above-mentioned embodiments, Y may be any anionic group which renders the general molecular formula (II) electrically neutral, and for example, Y is preferably, but not limited to, -COO—、-SO3 —、-HPO4 —Is more preferably-COO—、-SO3 —At least one of (1).
In the above-described embodiment, the solid filler is preferably at least one of an inorganic oxoacid salt, a metal halide, an organic carboxylic acid and a salt thereof, urea, and biuret, and more preferably at least one of a carbonate, a bicarbonate, a sulfate, a phosphate, a borate, a metal halide, a formate, an acetate, tartaric acid and a salt thereof, citric acid and a salt thereof, phthalic acid and a salt thereof, gallic acid and a salt thereof, urea, and biuret; the binder is preferably at least one of dextrin, epoxy resin, polyacrylamide, starch, cellulose, polyethylene glycol and the like.
In the above technical solution, the solid filler is preferably at least one of sodium carbonate, sodium bicarbonate, sodium borate, sodium chloride, sodium acetate, tartaric acid, sodium tartrate, citric acid, sodium citrate, potassium phthalate, urea, and biuret.
In the above technical solution, the binder is preferably at least one of polyacrylamide, starch, and polyethylene glycol.
The foam scrubbing agent composition of the present invention has no special requirement on water during preparation, and may be deionized water or water containing inorganic mineral matter, and the water containing inorganic mineral matter may be tap water, oil field stratum water or oil field injection water.
In the above technical solution, when the binder is not equal to 0 part, the preparation method of the solid foam discharging agent composition preferably includes the following steps:
(1) uniformly mixing alkylamine, long-chain polyether nitrogen-containing compound and solid filler according to the required mass portion to obtain a mixture;
(2) adding water into the adhesive until the adhesive is completely dissolved to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and pressing and forming to obtain a solid foam drainage agent, namely the solid foam drainage agent composition;
when the binder is equal to 0 part, the preparation method of the solid foam-exhaust agent composition preferably comprises the following steps:
(1) uniformly mixing alkylamine, long-chain polyether nitrogen-containing compound and solid filler according to the required mass portion to obtain a mixture;
(2) and then the mixture is pressed and molded to prepare the solid foam discharging agent composition.
In the technical scheme, the method is preferably applied to the gas well with the pH value of 3-7.
The foam scrubbing agent composition prepared by the method has good compatibility, and can also contain other treating agents commonly used in the field, such as surfactant, polymer, alkali and other oil extraction aids.
According to the foam discharging agent composition, the nitrogen-containing compounds of alkylamine and long-chain polyether are protonated under the acidic condition of pH, the separation pressure between foam liquid membranes is increased, the amount of bound water and bound water carried by the foam agent is increased, the liquid carrying amount of the foam is increased, and the liquid separation is slowed down, so that the foam discharging agent composition can be applied to the acid drainage gas production process.
By adopting the technical scheme of the method, the foam performance test is respectively carried out on the foam discharging agent under the conditions of pH 3, 5 and 7 according to SY/T6465-2000 foamer evaluation method for foam drainage and gas production, the foaming height is more than 140mm, the liquid carrying amount is more than 140mL, and the foam discharging agent has good acid resistance, foaming performance and liquid carrying capacity, and obtains better technical effects.
The invention is further illustrated by the following examples.
Drawings
FIG. 1 shows a liquid carrying amount measuring apparatus (the height of a jacket vessel is 1 m) for simulating measurement of liquid carrying amount of gas produced by liquid discharge.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
[ example 1 ]
(1) 10 g of alkylamine, 25 g of long-chain polyether nitrogen-containing compound and 35 g of sodium sulfate are mixed under normal temperature and normal pressure
Homogenizing to obtain a mixture;
(2)0.1 g of polyacrylamide is added with 1 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and pressing and forming to obtain the solid foam drainage rod FS-1, wherein the component structure of the solid foam drainage rod FS-1 is detailed in Table 1.
[ example 2 ]
(1) Under normal temperature and pressure, 5 g of alkylamine, 50 g of long-chain polyether nitrogen-containing compound, 30 g of sodium sulfate, 10 g of sodium carbonate, 30 g of sodium bicarbonate and 30 g of urea are uniformly mixed to obtain a mixture;
(2) 0.5 g of polyethylene glycol is added with 2 g of water and stirred until the polyethylene glycol is completely dissolved, so as to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain the solid foam drainage rod FS-2, wherein the component structure of the solid foam drainage rod FS-2 is detailed in table 1.
[ example 3 ]
(1) Under normal temperature and pressure, evenly mixing 50 g of alkylamine, 10 g of long-chain polyether nitrogen-containing compound, 10 g of urea and 1 g of citric acid to obtain a mixture;
(2) adding 0.1 g of starch and 2 g of water into the mixture, and stirring the mixture until the starch is completely dissolved to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain the solid foam drainage rod FS-3, wherein the component structure of the solid foam drainage rod FS-3 is detailed in table 1.
[ example 4 ]
(1) Under normal temperature and pressure, evenly mixing 20 g of alkylamine, 20 g of long-chain polyether nitrogen-containing compound, 20 g of urea, 5 g of sodium chloride and 1 g of sodium citrate to obtain a mixture;
(2) 0.01 g of cellulose is added with 0.5 g of water and stirred until the cellulose is completely dissolved, thus obtaining an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain the solid foam drainage rod FS-4, wherein the component structure of the solid foam drainage rod FS-4 is detailed in Table 1.
[ example 5 ]
(1) Under normal temperature and pressure, evenly mixing 20 g of alkylamine, 10 g of long-chain polyether nitrogen-containing compound, 7 g of sodium bicarbonate, 1 g of sodium borate, 2 g of sodium tartrate and 1 g of biuret to obtain a mixture;
(2)0.1 g of polyethylene glycol is added with 1.0 g of water and stirred until the polyethylene glycol is completely dissolved, so as to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain the solid foam drainage rod FS-5, wherein the component structure of the solid foam drainage rod FS-5 is detailed in table 1.
[ example 6 ]
(1) Under normal temperature and pressure, evenly mixing 10 g of alkylamine, 25 g of long-chain polyether nitrogen-containing compound and 35 g of sodium sulfate to obtain a mixture;
(2)0.1 g of polyacrylamide is added with 1.0 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain the solid foam drainage rod FS-6, wherein the component structure of the solid foam drainage rod FS-6 is detailed in Table 1.
[ example 7 ]
(1) Under normal temperature and pressure, 1 g of alkylamine, 50 g of long-chain polyether nitrogen-containing compound, 70 g of sodium sulfate and 30 g of urea are uniformly mixed to obtain a mixture;
(2) 0.2 g of polyethylene glycol is added with 1.5 g of water and stirred until the polyethylene glycol is completely dissolved, so as to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-7, wherein the component structure of the solid foam drainage rod FS-7 is detailed in Table 1.
[ example 8 ]
(1) Under normal temperature and pressure, evenly mixing 10 g of alkylamine, 25 g of long-chain polyether nitrogen-containing compound and 35 g of sodium sulfate to obtain a mixture;
(2)0.1 g of polyacrylamide is added with 1 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-8, wherein the component structure of the solid foam drainage rod FS-8 is detailed in Table 1.
[ example 9 ]
(1) Under normal temperature and pressure, evenly mixing 10 g of alkylamine, 25 g of long-chain polyether nitrogen-containing compound and 35 g of sodium sulfate to obtain a mixture;
(2)0.1 g of polyacrylamide is added with 1 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain the solid foam drainage rod FS-9, wherein the component structure of the solid foam drainage rod FS-9 is detailed in table 1.
[ example 10 ]
(1) Under normal temperature and pressure, evenly mixing 10 g of alkylamine, 25 g of long-chain polyether nitrogen-containing compound and 35 g of sodium sulfate to obtain a mixture;
(2)0.1 g of polyacrylamide is added with 1 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) and (3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain the solid foam drainage rod FS-10, wherein the component structure of the solid foam drainage rod FS-10 is detailed in Table 1.
[ example 11 ]
(1) Under normal temperature and pressure, evenly mixing 10 g of alkylamine, 25 g of long-chain polyether nitrogen-containing compound and 35 g of sodium sulfate to obtain a mixture;
(2) the above samples were press molded to produce solid foam drainage bars FS-11, the composition of which is detailed in Table 1.
[ example 12 ]
The solid foam drainage agents of examples 1 to 11 were dissolved in simulated aqueous solutions of pH 3, 5, and 7, respectively, at room temperature and under normal pressure to prepare aqueous solutions of 5000 mg/L.
[ example 13 ]
The initial height of foam of the foam scrubbing agent and the height of foam after 5 minutes were measured according to SY/T6465-.
4000mL/min of nitrogen was continuously introduced into the aqueous foam discharging agent solution, and the amount of foam carried over a period of 15 minutes was measured, and the results are shown in Table 2. The liquid carrying amount measuring apparatus used is shown in FIG. 1.
[ COMPARATIVE EXAMPLE 1 ]
(1) Using 35 g of alkylamine in example 1, without adding long-chain polyether nitrogen-containing compound, mixing with 35 g of sodium sulfate at normal temperature and normal pressure to obtain a mixture;
(2)0.1 g of polyacrylamide is added with 1 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S1;
(4) 1 g of FS-S1 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 3.
[ COMPARATIVE EXAMPLE 2 ]
(1) 55 g of alkylamine in example 2 is used, and 30 g of sodium sulfate, 10 g of sodium carbonate, 30 g of sodium bicarbonate and 30 g of urea are uniformly mixed under normal temperature and normal pressure without adding a long-chain polyether nitrogen-containing compound to obtain a mixture;
(2) 0.5 g of polyethylene glycol is added with 2 g of water and stirred until the polyethylene glycol is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S2;
(4) 1 g of FS-S2 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 3.
[ COMPARATIVE EXAMPLE 3 ]
(1) Using 60 g of alkylamine in example 3, adding no long-chain polyether nitrogen-containing compound, and uniformly mixing with 10 g of urea and 1 g of citric acid at normal temperature and normal pressure to obtain a mixture;
(2) adding 0.1 g of starch and 2 g of water into the mixture, and stirring the mixture until the starch is completely dissolved to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S3;
(4) 1 g of FS-S3 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 3.
[ COMPARATIVE EXAMPLE 4 ]
(1) Using 40 g of alkylamine in example 4, adding no long-chain polyether nitrogen-containing compound, and uniformly mixing with 20 g of urea, 5 g of sodium chloride and 1 g of sodium citrate at normal temperature and normal pressure to obtain a mixture;
(2) 0.01 g of polyacrylamide is added with 0.5 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S4;
(4) 1 g of FS-S4 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 3.
[ COMPARATIVE EXAMPLE 5 ]
(1) Using 30 g of alkylamine in example 5, adding no long-chain polyether nitrogen-containing compound, and uniformly mixing with 7 g of sodium bicarbonate, 1 g of sodium borate, 2 g of sodium tartrate and 1 g of biuret at normal temperature and normal pressure to obtain a mixture;
(2)0.1 g of polyethylene glycol is added with 1.0 g of water and stirred until the polyethylene glycol is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S5;
(4) 1 g of FS-S5 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 3.
[ COMPARATIVE EXAMPLE 6 ]
(1) Using 35 g of the long-chain polyether nitrogen-containing compound in example 1, adding no alkylamine, and uniformly mixing with 35 g of sodium sulfate at normal temperature and normal pressure to obtain a mixture;
(2)0.1 g of polyacrylamide is added with 1 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S6;
(4) 1 g of FS-S6 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 4.
[ COMPARATIVE EXAMPLE 7 ]
(1) Using 55 g of the long-chain polyether nitrogen-containing compound in example 2, adding no alkylamine, and uniformly mixing with 30 g of sodium sulfate, 10 g of sodium carbonate, 30 g of sodium bicarbonate and 30 g of urea at normal temperature and normal pressure to obtain a mixture;
(2) 0.5 g of polyethylene glycol is added with 2 g of water and stirred until the polyethylene glycol is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S7;
(4) 1 g of FS-S7 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 4.
[ COMPARATIVE EXAMPLE 8 ]
(1) 60 g of the long-chain polyether nitrogen-containing compound in example 3 was used, and 10 g of urea and 1 g of citric acid were uniformly mixed at normal temperature and pressure without adding alkylamine to obtain a mixture;
(2) adding 0.1 g of starch and 2 g of water into the mixture, and stirring the mixture until the starch is completely dissolved to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S8;
(4) 1 g of FS-S8 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 4.
[ COMPARATIVE EXAMPLE 9 ]
(1) 40 g of long-chain polyether containing nitrogen in example 4 was used, and 20 g of urea, 5 g of sodium chloride and 1 g of sodium citrate were uniformly mixed at normal temperature and pressure without adding an alkylamine compound to obtain a mixture;
(2) 0.01 g of polyacrylamide is added with 0.5 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S9;
(4) 1 g of FS-S9 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 4.
[ COMPARATIVE EXAMPLE 10 ]
(1) 30 g of the long-chain polyether nitrogen-containing compound in the example 5 is used, and is uniformly mixed with 7 g of sodium bicarbonate, 1 g of sodium borate, 2 g of sodium tartrate and 1 g of biuret at normal temperature and normal pressure without adding alkylamine to obtain a mixture;
(2)0.1 g of polyethylene glycol is added with 1.0 g of water and stirred until the polyethylene glycol is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S10;
(4) 1 g of FS-S10 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 4.
[ COMPARATIVE EXAMPLE 11 ]
(1) Using 35 g of the long-chain polyether nitrogen-containing compound in [ example 6 ], adding no alkylamine, and uniformly mixing with 35 g of sodium sulfate at normal temperature and normal pressure to obtain a mixture; (ii) a
(2)0.1 g of polyacrylamide is added with 1 g of water and stirred until the polyacrylamide is completely dissolved, so as to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and performing compression molding to obtain a solid foam drainage rod FS-S11;
(4) 1 g of FS-S11 solid was weighed and dissolved in simulated aqueous solutions of pH 3, 5 and 7 to prepare solutions of 5000mg/L, and the initial height of foam of the foam discharging agent and the height of foam after 5 minutes were measured as in example 13, and the results of the foam discharging performance test were shown in Table 4.
Composition component Structure in the examples of Table 1
Foam properties of the foam remover compositions in the examples of Table 2
TABLE 3 foam Properties of the foam remover compositions of comparative examples 1-5
TABLE 4 foam Properties of foam remover compositions of comparative examples 6-11
Claims (8)
1. A method for discharging liquid and producing gas by adopting a solid foam discharging agent composition comprises the following steps:
(1) feeding the solid foam-scrubbing agent composition into an aqueous gas well;
(2) contacting the solid foam-drain composition with gas and water or a gas and oil-water mixture in an aqueous gas well to form a foam fluid, and then lifting the foam fluid to the surface;
the solid foam scrubbing agent composition comprises the following components in parts by weight:
(1)1 part of alkylamine;
(2) 0.1-50 parts of a long-chain polyether nitrogen-containing compound;
(3) 0.2-100 parts of solid filler;
(4) 0-0.5 parts of adhesive;
the molecular general formula of the alkylamine is as follows:
wherein R is1Is C6～C16Any one of the alkyl groups of (a);
the molecular general formula of the long-chain polyether nitrogen-containing compound is as follows:
wherein, R is1Is C10～C26Fatty radical or C of10～C26An aromatic group of (a); y is 0-20, z is 0-60, and y and z are not 0 at the same time; r4、R5Is independently selected from C1～C5Alkyl of (C)1～C5Any one of the substituted alkyl groups of (a); r6、R7Is independently selected from C1～C5Alkylene of (C)1～C5Any one of the substituted alkylene groups of (a); y is selected from anionic groups which render the molecule of formula (II) electrically neutral.
2. The method of claim 1, wherein R is selected from the group consisting of1Is C10～C20Alkyl of (C)10～C20Alkyl phenyl of R7Is C2H4Or C3H6。
3. The method of liquid discharge gas production using a solid foam-remover composition according to claim 1, characterized in that z is greater than 0.
4. The method of claim 1, wherein the solid filler is at least one of an inorganic oxyacid salt, a metal halide, an organic carboxylic acid or a salt thereof, urea, and biuret.
5. The method of discharging liquid and producing gas with the solid foam-remover composition as claimed in claim 1, characterized in that the solid filler is at least one of carbonate, bicarbonate, sulphate, phosphate, borate, metal halide, formate, acetate, tartaric acid and its salts, citric acid and its salts, phthalic acid and its salts, gallic acid and its salts, urea, biuret.
6. The method of claim 1, wherein the binder is at least one of dextrin, epoxy resin, polyacrylamide, starch, cellulose, and polyethylene glycol.
7. The method for discharging and producing gas by using the solid foam discharging agent composition according to any one of claims 1 to 6, wherein when the binder is not equal to 0 part, the method for preparing the solid foam discharging agent composition comprises the following steps:
(1) uniformly mixing alkylamine, long-chain polyether nitrogen-containing compound and solid filler according to the required mass portion to obtain a mixture;
(2) adding water into the adhesive until the adhesive is completely dissolved to obtain an adhesive solution;
(3) uniformly mixing the mixture obtained in the step (1) and the adhesive solution obtained in the step (2), and pressing and forming to prepare a solid foam drainage rod, namely the solid foam drainage agent composition;
when the adhesive is equal to 0 part, the preparation method of the solid foam discharging agent composition comprises the following steps:
(1) uniformly mixing alkylamine, long-chain polyether nitrogen-containing compound and solid filler according to the required mass portion to obtain a mixture;
(2) and then the mixture is pressed and formed to prepare the solid foam discharging agent composition.
8. The method for liquid drainage and gas production by using the solid foam drainage agent composition according to any one of claims 1 to 6, wherein the pH value of the aqueous gas well is 3 to 7.
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