CN113913171B - Foam liquid discharging agent composition for acid gas well, foam liquid discharging agent composition liquid and application thereof - Google Patents
Foam liquid discharging agent composition for acid gas well, foam liquid discharging agent composition liquid and application thereof Download PDFInfo
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Abstract
The invention relates to the field of foam liquid drainage and gas production, in particular to a foam liquid drainage agent composition for an acid gas well, a foam liquid drainage agent composition liquid and application thereof. The foam liquid discharging agent composition comprises long-chain alkyl amido betaine shown in a formula (I) structure and long-chain polyether betaine shown in a formula (II) structure, and has excellent acid resistance, foaming property, thermal stability and liquid carrying property, so that the foam liquid discharging agent composition has excellent foam liquid discharging performance when applied to an acid gas well. Meanwhile, when the foam liquid discharging agent combination liquid provided by the invention is used in an aqueous solution with the mineralization degree of 100,000mg/L and the pH values of 3 and 7 respectively, and the gas flow rate is 100L/min (2.36 m/s), the liquid carrying amount is more than 150mL, and the foam liquid discharging agent combination liquid has good foaming performance and liquid carrying performance.
Description
Technical Field
The invention relates to the field of foam liquid drainage and gas production, in particular to a foam liquid drainage agent composition for an acid gas well, a foam liquid drainage agent composition liquid and application thereof.
Background
With the enhancement of the exploitation strength of the gas field, the liquid output of the gas field becomes a key problem for restricting the normal production of the gas well. The foam liquid drainage gas production technology is a liquid 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. The foam liquid drainage is to inject foam liquid 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 liquid drainage and gas production are achieved.
Indoor evaluation and application of the temperature-resistant and salt-resistant composite corrosion inhibition foaming agent disclose a corrosion inhibition foaming agent CT5-2 suitable for an acid gas field, which has the liquid carrying capacity of 153mL and has a good slow release effect.
The research on the foaming performance of a novel gas well foam discharging agent SP discloses that the gas well foam discharging agent SP is obtained by compounding an alkylated amphoteric imidazoline derivative, a calcium-magnesium ion complexing agent and a high-molecular foam stabilizer, and has good slow release performance when the liquid carrying amount in distilled water is 116 mL.
None of the above documents have investigated the foam properties under acidic conditions, where many surfactants are less active due to pH.
Disclosure of Invention
The invention aims to overcome the defects that in the process of developing an acid gas well, a foam liquid discharging agent is poor in acid resistance and insufficient in gas well energy, so that the foam liquid discharging performance is poor, liquid accumulates at the bottom of the well, the yield of the gas well is reduced, and even the gas well stops spraying in the prior art, and provides a foam liquid discharging agent composition, a foam liquid discharging agent composition and application thereof.
In order to achieve the above object, a first aspect of the present invention provides a foam drainage composition comprising: long chain hydrocarbyl amido betaines and long chain polyether betaines;
the long-chain alkyl amido betaine has a structure shown in a formula (I),
in the formula (I), R 1 Is a C10-C26 aliphatic hydrocarbon group; r 2 Is C1-C5 alkylene, R 3 And R 4 Each independently selected from the group consisting of H, C1-C5 hydrocarbyl and C1-C5 alkaneA group consisting of oxo groups; r is 5 Is a substituted or unsubstituted C1-C5 alkylene group or is- (CH) 2 ) n -O-, wherein n is an integer from 1 to 5;
m is any number from 1 to 3, X is selected from anionic groups which render the molecule of formula (I) electrically neutral;
the long-chain polyether betaine has a structure shown in a formula (II),
in the formula (II), R 1 A group selected from the group consisting of C10-C26 aliphatic hydrocarbon groups, C10-C26 aryl groups, and C11-C30 aryl groups substituted with C1-C4 hydrocarbon groups; y is any number from 0 to 20, and z is any number from 0 to 60; r 4 、R 5 Each independently selected from the group consisting of C1-C5 substituted or unsubstituted hydrocarbyl and C1-C5 alkoxy; r 6 Selected from substituted or unsubstituted C1-C5 alkylene or is- (CH) 2 ) p -O-, wherein p is an integer from 1 to 5; r 7 Selected from substituted or unsubstituted C1-C5 alkylene; y is selected from anionic groups which render the molecule of formula (II) electrically neutral.
In a second aspect, the present invention provides a foam drainage composition comprising the foam drainage composition and water.
The invention also provides application of the foam drainage agent combination liquid in drainage and gas production of a gas well.
Compared with the prior art, the foam drainage agent composition provided by the invention contains long-chain alkyl amido betaine shown in a formula (I) structure and long-chain polyether betaine shown in a formula (II) structure, wherein multiple hydrophilic functional groups can effectively improve the hydrophilicity of the foam drainage agent composition, improve the liquid carrying capacity of the foam, facilitate foam drainage, reduce the lipophilicity, increase the oil-water interfacial tension and improve the oil resistance of the foam drainage agent composition; the polyamino functional groups increase the acid resistance of the foam drainage agent. Meanwhile, under the preferable condition, the nitrogen-containing compound is added to stabilize the pH value of the system, destroy the hydrogen bond of water, accelerate the diffusion of the surfactant and reduce the gas flow resistance of the acidic high-gas-production gas well, thereby being more beneficial to carrying liquid. For example, in an aqueous solution with the mineralization of 100,000mg/L and the pH of 3 and 7 respectively, the foam-liquid discharging agent combination liquid provided by the invention has the liquid carrying amount of more than 150mL in a gas flow rate of 100L/min (2.36 m/s), and has good foaming performance and liquid carrying performance.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and these ranges or values should be understood to encompass values close to these ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The present invention provides in a first aspect a foam drainage composition comprising: long chain hydrocarbyl amido betaines and long chain polyether betaines;
the long-chain alkyl amido betaine has a structure shown in a formula (I),
in the formula (I), R 1 Is a C10-C26 aliphatic hydrocarbon group; r 2 Is C1-C5 alkylene, R 3 And R 4 Each independently selected from the group consisting of H, C1-C5 hydrocarbyl and C1-C5 alkoxy; r is 5 Is a substituted or unsubstituted C1-C5 alkylene group or is- (CH) 2 ) n -O-, wherein n is an integer from 1 to 5;
m is any number from 1 to 3, X is selected from anionic groups which render the molecule of formula (I) electrically neutral;
the long-chain polyether betaine has a structure shown in a formula (II),
in the formula (II), R 1 A group selected from the group consisting of C10-C26 aliphatic hydrocarbon groups, C10-C26 aryl groups, and C11-C30 aryl groups substituted with C1-C4 hydrocarbon groups; y is any number from 0 to 20, z is any number from 0 to 60; r 4 、R 5 Each independently selected from the group consisting of C1-C5 substituted or unsubstituted hydrocarbyl and C1-C5 alkoxy; r 6 Selected from substituted or unsubstituted C1-C5 alkylene or is- (CH) 2 ) p -O-, wherein p is an integer from 1 to 5; r 7 Selected from substituted or unsubstituted C1-C5 alkylene; y is selected from anionic groups which render the molecule of formula (II) electrically neutral.
The C10-C26 aliphatic hydrocarbon group refers to an aliphatic hydrocarbon group having a total number of carbon atoms of 10-26, and may be, for example, C 10 、C 11 、C 12 、C 13 、C 14 、C 15 、C 16 、C 17 、C 18 、C 19 、C 20 、C 21 、C 21 、C 23 、C 24 、C 25 Or C 26 The aliphatic hydrocarbon group of (2). For example, the C10-C26 aliphatic hydrocarbon group may be a C10-C26 alkyl group or a C10-C26 alkenyl group.
The C1-C5 alkylene group means an alkylene group having 1 to 5 carbon atoms in total, and may be, for example, C 1 、C 2 、C 3 、C 4 Or C 5 An alkylene group of (a).
The hydrocarbon group of C1 to C5 means a hydrocarbon group having 1 to 5 carbon atoms in total, and may be, for example, C 1 、C 2 、C 3 、C 4 Or C 5 A hydrocarbon group of (2). For example, may be C 1-4 Alkyl or C 2-4 Alkenyl groups of (a).
The C1-C5 alkoxy group means an alkoxy group having 1-5 carbon atoms in total, and may be, for example, C 1 、C 2 、C 3 、C 4 Or C 5 An alkoxy group of (2).
The C10-C26 aryl refers to aryl with the total number of carbon atoms of 10-26.
The C11-C30 aryl substituted by C1-C4 alkyl refers to aryl with 11-30 carbon atoms in total, and at least one H on the aryl is substituted by C1-C4 alkyl.
In the present invention, in order to improve the oil resistance and the acid resistance of the foam drain agent composition, it is preferable that the mass ratio of the long-chain alkylamidobetaine to the long-chain polyetherbetaine is 1: (0.005-20), preferably 1: (0.01-10).
In order to better reduce the gas oil surface tension of the long chain hydrocarbyl amido betaine and long chain polyether betaine, preferably, R 1 Is C10-C20 aliphatic hydrocarbon group. The R is 1 May be a C10-C20 alkyl group or an unsaturated hydrocarbon group. Said R is 1 May be a linear aliphatic hydrocarbon group and/or a branched aliphatic hydrocarbon group.
Preferably, R 2 is-C 2 H 4 -or-C 3 H 6 -。
Preferably, m is an integer from 1 to 3, for example 1, 2 or 3, preferably an arbitrary number from 1 to 2.
Preferably, R 3 And R 4 Each independently selected from the group consisting of H, C1-C5 alkyl and C1-C5 alkoxy, more preferably methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, C 2 H 5 O-and C 3 H 7 O-group.
According to the invention, X is any anionic group which renders the general molecular formula (I) electrically neutral, for example but not limited to X is preferably selected from-COO - 、-SO 3 - and-HPO 4 - Is more preferably-COO - and/or-SO 3 - 。
In the present invention, R 5 Is a substituted or unsubstituted C1-C5 alkylene group or is- (CH) 2 ) n -O-, wherein n is an integer from 1 to 5. Preferably, said R is 5 Is selected from-C 3 H 6 O-、-CH 2 -、-C 2 H 4 -or-C 3 H 6 -。
Preferably, R 1 A group selected from the group consisting of C10-C20 aliphatic hydrocarbon groups, C10-C20 aryl groups, and C11-C24 aryl groups substituted with C1-C4 hydrocarbon groups. Go toPreferably, R 1 A group selected from the group consisting of a C10-C20 alkyl group and a C11-C24 aryl group substituted with at least one substituent selected from the group consisting of a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group and a tert-butyl group. More preferably, R 1 Selected from C10-C20 aliphatic hydrocarbon radicals.
According to the invention, preferably, y is any number from 1 to 10, z is any number from 1 to 10; further preferably, y is an integer of 1 to 10, and z is an integer of 1 to 10.
According to the invention, when said R is 4 、R 5 When present, the substituent groups may each independently be oxygen. Preferably, R 4 、R 5 Each independently selected from methoxy, ethoxy, propoxy, methyl, ethyl, n-propyl, isopropyl, n-butyl or tert-butyl.
In the above technical solution, Y is not particularly limited, and may be selected from any anion that can make the molecule represented by formula (II) electrically neutral, such as but not limited to, halide ion, sulfate ion, sulfite ion, acetate ion, or polyanion; among these, Y is preferably a halogen ion, and more preferably at least one of a chloride ion and a bromide ion.
Invention pair R 6 、R 7 Has a wide selection range, and preferably R 6 Is selected from C1-C5 alkylene or is- (CH) 2 ) p -O-, wherein p is an integer from 1 to 5; r is 7 Selected from C1-C5 alkylene.
More preferably, R 6 Is methylene, pentylene or-C 3 H 6 O-。
More preferably, R 7 is-C 2 H 4 -or-C 3 H 6 -。
Preferably, the composition also contains a nitrogen-containing compound, and further preferably, the nitrogen-containing compound is selected from at least one of urea, an amide compound and a guanidine salt. Preferably, the amide compound is selected from C1-C6 amide compounds, more preferably dimethylacetamide and/or dimethylformamide. In the present invention, the guanidine salt has a wide range of carbon number selection, and is preferably a guanidine salt having no more than 6 carbon atoms, and may be at least one of guanidine carbonate, guanidine nitrate, guanidine hydrochloride, and aminoguanidine hydrochloride, and is preferably guanidine carbonate.
The nitrogen-containing compound of the present invention may be obtained commercially or may be prepared by a conventional method, and the present invention is not particularly limited thereto.
The content of the nitrogen-containing compound is not particularly limited, so long as the performance of the foam liquid discharging agent composition is improved; preferably, the small-molecule nitrogen-containing compound is contained in an amount of 0.01 to 100 parts by weight, preferably 0.5 to 10 parts by weight, relative to 1 part by weight of the long-chain alkyl amido betaine.
The foam drainage agent composition provided by the invention contains long-chain alkyl amido betaine with a structure shown in a formula (I) and long-chain polyether betaine with a structure shown in a formula (II) which have multiple hydrophilic group functional groups, wherein the multiple hydrophilic group functional groups have excellent acid resistance on one hand, and on the other hand, the amount of bound water and bound water carried by a foaming agent is increased, the liquid carrying amount of the foam is increased, the liquid separation is slowed down, and the liquid is further smoothly carried out; under the preferable condition, the addition of the auxiliary agents such as nitrogen-containing compounds stabilizes the pH of the system, destroys hydrogen bonds of water, enables the interaction of the water and the surfactant to be easier, reduces the gas flow resistance of the acid gas well and is more beneficial to carrying liquid.
In the present invention, there is no particular limitation in the preparation process of the foam drainage agent composition, as long as the long-chain alkylamidobetaine having the structure represented by formula (I), the long-chain polyetherbetaine having the structure represented by formula (II), and optionally the nitrogen-containing compound are uniformly mixed.
In the preparation process of the foam drainage agent composition, any two raw materials can be mixed firstly and then mixed with other raw materials, or parts of a certain raw material and other raw materials can be mixed respectively and then finally mixed together.
The state of the foam drainage composition of the present invention is not particularly limited, and may be any state known in the art, for example, for convenience of transportation, storage or field use, the above components may be directly mixed, or the above components may be dissolved in water for use. Preferably, the components are dissolved in water for use, so that the synergistic effect among different components can be more favorably exerted.
The foam drainage agent composition has good compatibility, and can also contain other treating agents commonly used in the field. The present invention will not be described herein.
In a second aspect, the present invention provides a foam drainage composition comprising the foam drainage composition and water.
According to the present invention, it is preferable that the content of the foam drainage agent composition in the foam drainage agent composition liquid is 0.07 to 1% by weight.
In the present invention, there is a wide range of choices for the kind of water, and preferably, the water may be deionized water or mineral-containing water, wherein the mineral content in the mineral-containing water is preferably 0-100,000mg/L.
Further preferably, the mineral-containing water is selected from at least one of tap water, field formation water and field injection water.
The state of the foam drainage agent composition is not particularly limited, and the foam drainage agent composition can be in any state known in the art, such as an aqueous paste form for convenience of transportation, storage or field use, or an aqueous solution form, wherein the aqueous solution form is selected from a form of a concentrated solution prepared by using water and/or a form of a foam drainage agent directly prepared to a concentration required for on-site oil displacement. In the present invention, a foam drainage agent composition liquid in which a foam drainage agent is dissolved in water is preferable, wherein the water is defined as above.
In the present invention, the preparation process of the foam drainage agent composition is not particularly limited as long as the foam drainage agent composition is uniformly mixed with water, that is, the long-chain alkylamidobetaine having the structure represented by formula (I), the long-chain polyether betaine having the structure represented by formula (II), the optional nitrogen-containing compound, and water are uniformly mixed. The mixing can be carried out by mixing any two raw materials and then mixing the two raw materials with other raw materials, or can be carried out by mixing part of a certain raw material with other raw materials respectively and then finally mixing the two raw materials together.
In the preparation process of the foam drainage agent composition liquid, other conditions for mixing are not limited, for example, mixing can be performed under a heating condition, and mixing can also be performed under an ultrasonic condition as long as the uniformity of the foam drainage agent composition liquid is improved. In the production method of the present invention, the mixing is preferably performed at room temperature under normal pressure.
The invention also provides application of the foam drainage agent combination liquid in drainage and gas production of a gas well.
The invention has no special limitation on the type of the gas well as long as the foam liquid drainage performance of the foam liquid drainage agent composition liquid can be exerted in the application; preferably, the gas production rate of the gas well is more than or equal to 1m/s, more preferably 1-3m/s, and the pH of produced water is 3-7.
According to the present invention, the specific conditions for the application of the foam drainage agent composition are not particularly limited, and the application of the foam drainage agent composition may be performed according to the conventional application in the art. The components in the foam drainage agent combination liquid can be added into a gas well independently or after mixing, and preferably after mixing.
The present invention will be described in detail below by way of examples. In the following examples of the present invention, the following examples,
the alkylamidobetaines were prepared according to 201911011301.3.
The long chain polyether betaines were prepared according to the method disclosed in CN 106590577A.
Nitrogen-containing compounds such as urea, amide compounds and guanidine salts are commercially available.
Without special description, the room temperature and the normal temperature both refer to 25 ℃.
The compositional structures of the long chain hydrocarbyl amido betaines and long chain polyether betaines of examples 1-12 are shown in Table 1.
The pH of the aqueous solution was adjusted with dilute hydrochloric acid in the following examples.
Example 1
And (2) weighing and dissolving long-chain alkyl amido betaine, long-chain polyether betaine and urea in an aqueous solution with the mineralization degree of 100,000mg/L and the mass ratio of 1 to 0.1 at the pH values of 3 and 7 respectively at normal temperature and normal pressure to prepare a 0.5wt% solution, thus obtaining the foam liquid drainage agent composition HF-1.
Example 2
Under normal temperature and pressure, long-chain alkyl amido betaine, long-chain polyether betaine and urea are weighed and dissolved in an aqueous solution with the mineralization degree of 100,000mg/L and the mass ratio of 1.
Example 3
At normal temperature and normal pressure, weighing long-chain alkyl amido betaine, long-chain polyether betaine and guanidine carbonate, and dissolving in an aqueous solution with the mineralization of 100,000mg/L and the mass ratio of 3 to 7 respectively according to the following ratio of 1.
Example 4
And (2) weighing long-chain alkyl amido betaine, long-chain polyether betaine and dimethyl acetamide at normal temperature and normal pressure, and dissolving the long-chain alkyl amido betaine, the long-chain polyether betaine and the dimethyl acetamide in an aqueous solution with the mineralization degree of 100,000mg/L according to the mass ratio of 1.1.
Example 5
And (2) weighing and dissolving long-chain alkyl amido betaine, long-chain polyether betaine and urea according to a mass ratio of 0.5 to 0.5, wherein the pH values are respectively 3 and 7, and the water solution has a mineralization degree of 100,000mg/L, and preparing a 0.5wt% solution to obtain the foam liquid discharging agent composition liquid HF-5.
Example 6
Under normal temperature and pressure, long-chain alkyl amido betaine, long-chain polyether betaine and urea are weighed and dissolved in water solution with the mineralization degree of 100,000mg/L and the pH value of 3 and 7 respectively according to the mass ratio of 1 to 2, and 0.5wt% of solution is prepared, so that the foam drainage agent composition liquid HF-6 is obtained.
Example 7
At normal temperature and normal pressure, weighing long-chain alkyl amido betaine, long-chain polyether betaine and urea, and dissolving in an aqueous solution with the mineralization of 100,000mg/L and the pH of 3 and 7 respectively according to the mass ratio of 0.5 to 0.3 to prepare a 0.5wt% solution, thus obtaining the foam drainage agent composition liquid HF-7.
Example 8
Under normal temperature and pressure, long-chain alkyl amido betaine and long-chain polyether betaine are weighed according to the mass ratio of 1 to 3, and are dissolved in aqueous solution with the mineralization degree of 100,000mg/L and the pH of 3 and 7 respectively to prepare 0.5 weight percent solution, and then the foam liquid discharging agent composite solution HF-8 is obtained.
Example 9
At normal temperature and normal pressure, long-chain alkyl amido betaine, long-chain polyether betaine and urea are weighed and dissolved in an aqueous solution with the mineralization degree of 100,000mg/L and the pH of 3 and 7 respectively according to the mass ratio of 1.1.
Example 10
At normal temperature and normal pressure, long-chain alkyl amido betaine, long-chain polyether betaine and urea are weighed and dissolved in an aqueous solution with the mineralization degree of 100,000mg/L and the pH of 3 and 7 respectively according to the mass ratio of 1.1.
Example 11
At normal temperature and normal pressure, long-chain alkyl amido betaine, long-chain polyether betaine and urea are weighed and dissolved in an aqueous solution with the mineralization degree of 100,000mg/L and the pH of 3 and 7 respectively according to the mass ratio of 1.1.
Example 12
At normal temperature and normal pressure, long-chain alkyl amido betaine, long-chain polyether betaine and urea are weighed and dissolved in an aqueous solution with the mineralization degree of 100,000mg/L and the pH of 3 and 7 respectively according to the mass ratio of 1.1.
Comparative example 1
The HFL01 foam drainage agent prepared by the method provided in CN109679618A is dissolved in an aqueous solution to prepare a 0.5wt% solution, and then the foam drainage agent composition DHF-1 is obtained.
TABLE 1
| Foam drainage agent combined liquid | R 1 | R 2 | m | R 3 | R 4 | R 5 | X |
| HF-1 | C 16 H 33 | C 2 H 4 | 2 | CH 3 | CH 3 | C 3 H 6 O | SO 3 - |
| HF-2 | C 20 H 41 | C 2 H 4 | 2 | C 2 H 5 | C 2 H 5 | C 2 H 4 | COO - |
| HF-3 | C 10 H 21 | C 3 H 6 | 1 | C 3 H 7 O | C 3 H 7 O | C 3 H 6 | SO 3 - |
| HF-4 | C 12 H 25 | C 2 H 4 | 1 | C 2 H 5 O | C 2 H 5 O | CH 2 | SO 3 - |
| HF-5 | C 16 H 33 | C 2 H 4 | 2 | C 2 H 5 | C 2 H 5 | C 2 H 4 | SO 3 - |
| HF-6 | C 16 H 33 | C 2 H 4 | 2 | CH 3 | CH 3 | C 2 H 4 | SO 3 - |
| HF-7 | C 12 H 25 | C 2 H 4 | 1 | CH 3 | CH 3 | C 2 H 4 | COO - |
| HF-8 | C 12 H 25 | C 2 H 4 | 1 | CH 3 | CH 3 | C 2 H 4 | COO - |
| HF-9 | C 16 H 33 | C 2 H 4 | 3 | CH 3 | CH 3 | C 3 H 6 O | SO 3 - |
| HF-10 | C 26 H 51 | C 2 H 4 | 3 | CH 3 | CH 3 | C 3 H 6 O | SO 3 - |
| HF-11 | C 16 H 33 | C 2 H 4 | 2 | CH 3 | CH 3 | C 3 H 6 O | SO 3 - |
| HF-12 | C 16 H 33 | C 5 H 10 | 2 | CH 3 | CH 3 | C 3 H 6 O | SO 3 - |
TABLE 1
Test example
Testing the foam liquid carrying amount: 50L/min (1.18 m/s) and 100L/min (2.36 m/s) of nitrogen were continuously introduced into the aqueous solutions of the foam drainage agent composition liquids (HF-1 to HF-12 and DHF-1) prepared in examples 1 to 12 and comparative example 1, respectively, at 50 ℃, the air blowing time was 5min, and after the air blowing was completed, the volume of the liquid carried out was recorded, wherein the test results are shown in Table 2.
In the foam drainage agent composition liquids prepared in examples 1 to 12, simulated water having a water mineralization of 100,000mg/L was used.
TABLE 2
The results in table 2 show that the foam liquid-drainage agent composition provided by the invention has high acid resistance and liquid carrying performance at high air speed, and particularly, the foam liquid-drainage agent composition prepared in example 1 has liquid carrying capacities as high as 173mL, 171mL, 170mL and 170mL in aqueous solution with mineralization of 100,000mg/L and pH values of 3 and 7 respectively at air speeds of 50L/min and 100L/min, and has good quick foaming performance and liquid carrying performance, and good technical effects are achieved.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (13)
1. A foam drainage composition comprising: long chain hydrocarbyl amido betaines and long chain polyether betaines;
the long-chain alkyl amido betaine has a structure shown in a formula (I),
in the formula (I), R 1 Is a C10-C26 aliphatic hydrocarbon group; r is 2 Is C1-C5 alkylene, R 3 And R 4 Each independently selected from the group consisting of C1-C5 hydrocarbyl and C1-C5 alkoxy; r 5 Is a substituted or unsubstituted C1-C5 alkylene group or is- (CH) 2 ) n -O-, wherein n is an integer from 1 to 5;
m is any number from 1 to 3, X is selected from anionic groups such that the molecule of formula (I) is electrically neutral;
the long-chain polyether betaine has a structure shown in a formula (II),
in the formula (II), R 1 A group selected from the group consisting of C10-C26 aliphatic hydrocarbon groups, C10-C26 aryl groups, and C11-C30 aryl groups substituted with C1-C4 hydrocarbon groups; y is an arbitrary number from 0 to 20, z is an arbitrary number from 0 to 60, and y and z are not simultaneously equal to each other0；R 4 、R 5 Each independently selected from the group consisting of C1-C5 substituted or unsubstituted hydrocarbyl and C1-C5 alkoxy; r 6 Selected from substituted or unsubstituted C1-C5 alkylene or is- (CH) 2 ) p -O-, wherein p is an integer from 1 to 5; r 7 Selected from substituted or unsubstituted C1-C5 alkylene; y is selected from anionic groups such that the molecule of formula (II) is electrically neutral;
the mass ratio of the long-chain alkyl amido betaine to the long-chain polyether betaine is 1: (0.005-20);
the composition also contains a nitrogen-containing compound, wherein the nitrogen-containing compound is selected from at least one of urea, an amide compound and a guanidine salt;
the amide compound is selected from C1-C6 amide compounds;
the content of the nitrogen-containing compound is 0.1 to 100 parts by weight relative to 1 part by weight of the long-chain alkyl amido betaine.
2. The composition of claim 1, wherein the mass ratio of long chain hydrocarbyl amido betaine to long chain polyether betaine is 1: (0.01-10).
3. The composition of claim 1, wherein y is any number from 1 to 10 and z is any number from 1 to 10.
4. The composition of any one of claims 1-3, wherein R 1 Is a C10-C20 aliphatic hydrocarbon group;
R 2 is-C 2 H 4 -or-C 3 H 6 -；
m is an integer of 1 to 3;
R 3 and R 4 Each independently selected from the group consisting of C1-C5 alkyl and C1-C5 alkoxy;
x is selected from-COO - 、-SO 3 - and-HPO 4 - At least one of (a).
5. The composition of claim 4, wherein m is any number from 1 to 2;
R 3 and R 4 Each independently selected from methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, C 2 H 5 O-and C 3 H 7 O-group.
6. The composition of any one of claims 1-3, wherein R 1 A group selected from the group consisting of C10-C20 aliphatic hydrocarbon groups, C10-C20 aryl groups, and C11-C24 aryl groups substituted with C1-C4 hydrocarbon groups.
7. The composition of claim 6, wherein R 1 A group selected from the group consisting of a C10-C20 alkyl group and a C11-C24 aryl group substituted with at least one substituent selected from the group consisting of a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group and a tert-butyl group.
8. The composition of any one of claims 1-3, wherein R 4 、R 5 Each independently selected from methoxy, ethoxy, propoxy, methyl, ethyl, n-propyl, isopropyl, n-butyl or tert-butyl;
R 6 is methylene, pentylene or-C 3 H 6 O-；
R 7 is-C 2 H 4 -or-C 3 H 6 -；
Y is-COO - or-SO 3 - 。
9. The composition according to any one of claims 1 to 3, wherein the nitrogen-containing compound is contained in an amount of 0.5 to 10 parts by weight relative to 1 part by weight of the long-chain hydrocarbyl amido betaine.
10. A foam drainage composition comprising the foam drainage composition of any one of claims 1 to 9 and water.
11. The composition of claim 10, wherein the foam drainage composition comprises 0.07 to 1% by weight of the foam drainage composition.
12. Use of the foam drainage composition according to any one of claims 1 to 9 or the foam drainage composition according to claim 10 or 11 in gas well drainage gas recovery.
13. The use of claim 12 in which the gas well has a gas production rate of 1m/s or more and a water production pH of 3 to 7.
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| CN105439885A (en) * | 2015-12-01 | 2016-03-30 | 西安长庆化工集团有限公司 | Fatty acid amide propyl betaine foam scrubbing agent as well as preparation method and application thereof |
| CN109679632A (en) * | 2017-10-18 | 2019-04-26 | 中国石油化工股份有限公司 | Using the method for foaming water discharge agent composition liquid discharging gas producing |
| CN111088019A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Reinforced high-temperature-resistant foam drainage agent composition, preparation method thereof and gas production method |
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| US20070181307A1 (en) * | 2006-02-09 | 2007-08-09 | Jiang Yang | Synergistic surfactant compositions for unloading fluids from oil and gas wells |
| US8746341B2 (en) * | 2011-05-06 | 2014-06-10 | Nalco Company | Quaternary foamers for downhole injection |
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| CN105439885A (en) * | 2015-12-01 | 2016-03-30 | 西安长庆化工集团有限公司 | Fatty acid amide propyl betaine foam scrubbing agent as well as preparation method and application thereof |
| CN109679632A (en) * | 2017-10-18 | 2019-04-26 | 中国石油化工股份有限公司 | Using the method for foaming water discharge agent composition liquid discharging gas producing |
| CN111088019A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Reinforced high-temperature-resistant foam drainage agent composition, preparation method thereof and gas production method |
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