CN109679638B

CN109679638B - Foam drainage agent composition, preparation method and application

Info

Publication number: CN109679638B
Application number: CN201711004604.3A
Authority: CN
Inventors: 何秀娟; 裘鋆; 马俊伟; 吴国英
Original assignee: China Petroleum and Chemical Corp; Sinopec Shanghai Research Institute of Petrochemical Technology
Current assignee: China Petroleum and Chemical Corp; Sinopec Shanghai Research Institute of Petrochemical Technology
Priority date: 2017-10-18
Filing date: 2017-10-18
Publication date: 2021-05-28
Anticipated expiration: 2037-10-18
Also published as: CN109679638A

Abstract

The invention relates to an acid-resistant water-draining gas-collecting foam discharging agent composition and a preparation method and application thereof. The method mainly solves the problem that the existing acid gas well has excessive liquid accumulation in the development process, so that the yield of the gas well is reduced and even the gas well stops spraying. The invention adopts an acid-resistant water-drainage gas-production foam discharging agent composition which comprises the following components in parts by mass: (1)1 part of alkylamine; (2) 0.1-50 parts of a long-chain polyether nitrogen-containing compound; (3) 0-10 parts of nanoparticles; wherein the alkylamine has a general molecular formula shown in formula (I): the long-chain polyether nitrogen-containing compound has the molecular general formula shown in the formula (II), so that the problem is solved well, and the long-chain polyether nitrogen-containing compound can be used in a gas well drainage and gas production process.

Description

Foam drainage agent composition, preparation method and application

Technical Field

The invention relates to a foam water discharging agent composition and a preparation method thereof, in particular to an acid-resistant foam water discharging agent composition and a preparation method thereof.

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.

Disclosure of Invention

The invention aims to solve the technical problem that the yield of an existing acid gas well is reduced and even the gas well stops spraying due to excessive liquid loading in the development process of the existing acid gas well, and provides a foam discharging agent composition, in particular to the foam discharging agent composition for drainage gas production of the acid gas well, which is used for drainage gas production of the gas well, can carry liquid with high efficiency, and has good acid resistance, foaming performance and liquid carrying capacity.

The second technical problem to be solved by the present invention is to provide a method for preparing a foam discharging agent composition corresponding to the first technical problem.

The third technical problem to be solved by the present invention is to provide an application of the foam discharging agent composition corresponding to the solution of one of the above technical problems.

In order to solve one of the above technical problems, the technical scheme adopted by the invention is as follows: the 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) 0-10 parts of nano particles.

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～C₅Any one of the alkylene group and the substituted alkylene group of (1); 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 technical solution, the nanoparticle is preferably at least one of nano silica, nano calcium carbonate, and nano hectorite, and more preferably nano silica.

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.

To solve the second technical problem, the invention adopts the following technical scheme: a method for preparing a foam discharging agent composition according to any one of the above technical solutions to solve the technical problems, comprising the steps of:

and uniformly mixing the alkylamine, the long-chain polyether nitrogen-containing compound and the nano particles with water according to the required mass parts to obtain the foam discharging agent composition for water drainage and gas production.

In order to solve the third technical problem, the technical scheme adopted by the invention is as follows: the application of the foam scrubbing agent composition in any one of the technical schemes for solving the technical problems in drainage and gas production is disclosed.

In the above technical solution, the application is not particularly required, and a person skilled in the art can use the foam scrubbing agent composition of the present invention according to the actual application environment, for example, but not limited to, the application is preferably applied to a gas well with a pH value of 3 to 7.

The alkylamine and long-chain polyether nitrogen-containing compounds which are key effective components of the foam discharging agent composition can be supplied in various forms for convenience in transportation, storage or field use, such as a non-aqueous solid form, an aqueous paste form or an aqueous solution form; the water solution form comprises a form of preparing a concentrated solution by using water and a form of directly preparing a foam scrubbing agent with concentration required by on-site oil displacement; the water is not particularly required, and can be deionized water or water containing inorganic minerals, and the water containing the inorganic minerals can be tap water, formation water of an oil and gas field or injection water of the oil and gas field.

The foam scrubbing agent composition 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.

In the foam scrubbing agent composition, the alkylamine and the long-chain polyether nitrogen-containing compound are protonated under the pH acidic condition, so that the separation pressure between foam liquid membranes is increased, the amount of bound water and bound water carried by the foaming agent is increased, the liquid carrying amount of the foam is increased, and the liquid separation is slowed down, so that the foam scrubbing agent composition can be applied to the acid drainage gas production process.

By adopting the technical scheme of the invention, 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 135mm, 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 jacketed vessel is 1 m).

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 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:2:1 respectively to prepare 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-1. The component structure is shown in table 1.

[ example 2 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:10:5 respectively to prepare 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-2. The component structure is shown in table 1.

[ example 3 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:0.2:0.5 to prepare 1.0 wt% solution, so as to obtain the foam scrubbing agent composition HF-3. The component structure is shown in table 1.

[ example 4 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:1:0.1 respectively to prepare a 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-4. The component structure is shown in table 1.

[ example 5 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:0.5:0.5 respectively to prepare 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-5. The component structure is shown in table 1.

[ example 6 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:2:1 respectively to prepare a 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-6. The component structure is shown in table 1.

[ example 7 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:3:0.5 to prepare 1.0 wt% solution, so as to obtain the foam scrubbing agent composition HF-7. The component structure is shown in table 1.

[ example 8 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds, and dissolving nano silicon dioxide in aqueous solutions of pH 3, 5 and 7 according to the mass ratio of 1:50:10 respectively at normal temperature and normal pressure to prepare a 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-8. The component structure is shown in table 1.

[ example 9 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:2:1 respectively to prepare 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-9. The component structure is shown in table 1.

[ example 10 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:2:1 respectively to prepare a 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-10. The component structure is shown in table 1.

[ example 11 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, and dissolving nano silicon dioxide in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:2:1 respectively to prepare a 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-11. The component structure is shown in table 1.

[ example 12 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds, and dissolving nano calcium carbonate in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:2:1 respectively to prepare 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-12. The component structure is shown in table 1.

[ example 13 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano hectorite in aqueous solutions of pH 3, pH 5 and pH 7 according to the mass ratio of 1:2:1, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-13. The component structure is shown in table 1.

[ example 14 ]

Weighing alkylamine and long-chain polyether nitrogen-containing compounds, and dissolving the alkylamine and the long-chain polyether nitrogen-containing compounds in aqueous solutions of pH 3, pH 5 and pH 7 respectively according to the mass ratio of 1:2 to prepare 1.0 wt% solution, thus obtaining the foam scrubbing agent composition HF-14. The component structure is shown in table 1. [ example 15 ]

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.

As can be seen from the result data of the foam discharging agents in examples 6 and 11, under the same proportion condition, when z is not zero, the technical effects of foaming power, foam stability, liquid carrying capacity and the like are obviously improved.

[ COMPARATIVE EXAMPLE 1 ]

The alkylamine and nanosilicon dioxide of [ examples 1-5 ] were used to prepare a foam discharging agent composition without adding a long chain polyether nitrogen-containing compound, and the initial height of the foam discharging agent, the height of the foam after 5 minutes, and the amount of the foam carried over 15 minutes were measured as in [ example 15 ], and the results are shown in Table 3.

[ COMPARATIVE EXAMPLE 2 ]

The foam discharging agent composition was prepared by using the long chain polyether nitrogen-containing compound and nano-silica in [ examples 1 to 6 ] without adding alkylamine, and the initial height of foam discharging agent, the height of foam after 5 minutes, and the amount of foam carried in 15 minutes were measured as in [ example 15 ], and the results are shown in table 4.

[ COMPARATIVE EXAMPLE 3 ]

A foam discharging agent composition was prepared by using tetradecyldimethylbetaine and dodecylamine at a mass ratio of 1:2, and the initial height of foam discharging agent, the height of foam after 5 minutes, and the amount of foam carried over 15 minutes were measured as in example 15, and the results are shown in Table 5.

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 composition of comparative example 1

TABLE 4 foam Properties of the foam remover composition of comparative example 2

TABLE 5 foam Properties of the foam remover composition of comparative example 3

Claims

1. The 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) 0-10 parts of nanoparticles;

the molecular general formula of the alkylamine is as follows:

R¹-NH₂formula (I);

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 foam scrubbing composition of claim 1, wherein R is₁Is C₁₀～C₂₀Alkyl or C₁₀～C₂₀Alkyl phenyl of R₇Is C₂H₄Or C₃H₆。

3. The foam scrubbing composition of claim 1, wherein z is greater than 0.

4. The foam remover composition as claimed in claim 1, wherein the nano-particles are at least one of nano-silica, nano-calcium carbonate, nano-hectorite.

5. The foam scrubbing composition of claim 1, wherein said nanoparticles are nanosilica.

6. A process for preparing a foam remover composition as claimed in any one of claims 1 to 5 comprising the steps of: and uniformly mixing the alkylamine, the long-chain polyether nitrogen-containing compound and the nano particles with water according to the required mass parts to obtain the foam scrubbing agent composition.

7. Use of the foam discharging agent composition as claimed in any one of claims 1 to 5 in water drainage and gas production.

8. The foam discharging agent composition as claimed in claim 7 is applied to drainage and gas production, and is characterized in that the pH value of a gas well is 3-7.