CN109679606B

CN109679606B - Foam drainage agent composition and preparation method and application thereof

Info

Publication number: CN109679606B
Application number: CN201710969486.3A
Authority: CN
Inventors: 何秀娟; 裘鋆; 何良好; 李应成
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: CN109679606A

Abstract

The invention relates to a foam scrubbing agent composition for high-temperature deep well drainage and gas recovery, and a preparation method and application thereof. The method mainly solves the problem that the gas well has reduced yield and even stops spraying due to excessive liquid loading in the development process of the existing high-temperature deep well gas well. The invention comprises the following components in parts by mass: (1)1 part of alkylamine polyether; (2) 0.1-50 parts of a long-chain polyether nitrogen-containing compound; (3) 0-10 parts of nanoparticles; wherein the alkylamine polyether has a general molecular formula shown in formula (I): the long-chain polyether nitrogen-containing compound has a molecular general formula shown in a formula (II): r¹Is C₈～C₂₀Any one of the alkyl groups of (a); m, n, p and q are any number of 0-20; r₁Is C₁₀～C₂₆The technical scheme of the fat base well solves the problem and can be used in the drainage and gas production industry of high-temperature gas wells.

Description

Foam drainage agent composition and preparation method and application thereof

Technical Field

The invention relates to a foam drainage agent composition, a preparation method and application thereof, and is particularly suitable for high-temperature deep wells.

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. US7122509 reports a high temperature foam scrubbing agent formulation, which improves the temperature resistance of the system by using the research idea of neutralization of anionic surfactant and amine. 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, the molecular structure contains amide groups which are sensitive to high temperature, so that the gas well adaptability of the gas well above 100 ℃ is poor. The foam drainage gas production process technology is researched from the last 80 years in China, UT series is foam drainage agent which is widely applied to domestic gas fields, at present, the UT series foam drainage agent and more than twenty related matched products are adopted, and the foam drainage agent is suitable for UT-11C of medium-deep wells and ultra-deep wells, the hypersalinity resistance is 250,000g/L, and the high temperature reaches 130 ℃.

Disclosure of Invention

The invention aims to solve the technical problem that the yield of a gas well is reduced and even the gas well stops spraying due to excessive liquid loading in the development process of the existing high-temperature deep well gas well, and provides a foam discharging agent composition, in particular a foam discharging agent composition for high-temperature-resistant drainage gas production, which is used for the gas well, particularly a high-temperature deep well, can carry liquid with high efficiency and has good temperature 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 scrubbing agent composition for high temperature resistant drainage gas production corresponding to the first technical problem.

The invention also provides an application method of the foam scrubbing agent composition for high-temperature-resistant water drainage and gas production, which corresponds to the solution of one of the 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 polyether;

(2) 0.1-50 parts of a long-chain polyether nitrogen-containing compound;

(3) 0-10 parts of nano particles.

In the above technical solution, the general molecular formula of the alkylamine polyether is preferably:

wherein R is¹Is C₈～C₂₀Any one of the alkyl groups of (a); m, n, p and q are independently selected from any number of 0-20, and m + n is more than or equal to 1. Further, m + p is preferably an arbitrary number of 1 to 5, and n + q is preferably an arbitrary number of 5 to 15.

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 anions which render the molecule of formula (II) electrically neutralA group; 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 polyether, 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 for water drainage and gas production.

In order to solve the third technical problem, the technical scheme adopted by the invention is as follows: use of a foam remover composition according to any of the above-mentioned embodiments for solving the problems.

In the above technical scheme, the application has no special requirement, 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 gas well temperature in the application can be as high as 180 ℃, and the foam scrubbing agent of the present invention still has good application performance.

The alkylamine polyether and the long-chain polyether nitrogen-containing compound which are key effective components of the foam discharging agent can be supplied in various forms for convenience of 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.

The thermal decomposition temperature of the alkylamine polyether and the long-chain polyether nitrogen-containing compound in the foam scrubbing agent composition is 200 ℃, and the nitrogen-containing compound is not hydrolyzed in aqueous solution; and secondly, the composition contains a plurality of hydrophilic groups, the amount of bound water and bound water carried by the foaming agent is increased due to the hydrophilic groups, the liquid carrying amount of the foam is increased, and the liquid separation is slowed down, so that the composition can be applied to the high-temperature deep well drainage gas recovery process at 180 ℃.

By adopting the technical scheme of the invention, the foam performance test is carried out on the foam discharging agent according to SY/T6465-.

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 polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:2:1, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-1. The component structure is shown in table 1.

[ example 2 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:10:5, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-2. The component structure is shown in table 1.

[ example 3 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:0.2:0.5, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-3. The component structure is shown in table 1.

[ example 4 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:1:0.1, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-4. The component structure is shown in table 1.

[ example 5 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:0.5:0.5, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-5. The component structure is shown in table 1.

[ example 6 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:2:1, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-6, wherein the component structure is shown in table 1.

[ example 7 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:3:0.5, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-7. The component structure is shown in table 1.

[ example 8 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:50:10, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-8. The component structure is shown in table 1.

[ example 9 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:2:1, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-9. The component structure is shown in table 1.

[ example 10 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:2:1, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-10. The component structure is shown in table 1.

[ example 11 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano silicon dioxide in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:2:1, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-11. The component structure is shown in table 1.

[ example 12 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano calcium carbonate in 100,000mg/L sodium chloride aqueous solution according to the mass ratio of 1:2:1, and preparing into 1.0 wt% solution to obtain the foam scrubbing agent composition HF-12. The component structure is shown in table 1.

[ example 13 ]

Weighing alkylamine polyether and long-chain polyether nitrogen-containing compounds at normal temperature and normal pressure, dissolving nano hectorite in 100,000mg/L sodium chloride aqueous solution 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 polyether and long-chain polyether nitrogen-containing compounds according to the mass ratio of 1:2, dissolving in 100,000mg/L sodium chloride aqueous solution, and preparing into 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.

The test was carried out using a pressure-resistant and acid-resistant aging apparatus, and after aging at 180 ℃ for 24 hours, the properties such as the initial foaming height, the foaming height after 5 minutes, and the liquid carrying amount after 15 minutes were measured again, and the results are shown in Table 2.

[ COMPARATIVE EXAMPLE 1 ]

The alkylamine polyether and nanosilica in [ 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 ]

Using the long-chain polyether nitrogen-containing compound and nanosilica in [ examples 1-6 ] and without adding alkylamine polyether, a foam composition was prepared, and the initial height of foam, 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 4.

[ COMPARATIVE EXAMPLE 3 ]

A foam displacement agent composition was prepared by using tetradecyldimethylbetaine and hexadecylamine polyoxypropylene (2) polyoxyethylene (12) ether at a mass ratio of 1:2, and the initial foam height, the foam height after 5 minutes, and the amount of foam carried over 15 minutes of the foam displacement agent 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 polyether;

(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 polyether is as follows:

wherein R is¹Is C₈～C₂₀Any one of the alkyl groups of (a); m, n, p and q are respectively and independently selected from any number of 0-20, m + n is more than or equal to 1, m + p is any number of 1-5, and n + q is any number of 5-15;

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, 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 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; z is greater than 0.

2. The foam scrubbing composition of claim 1, wherein R is₁Is C₁₀～C₂₀Alkyl of (C)₁₀～C₂₀Of an alkylbenzene of, R₇Is C₂H₄Or C₃H₆。

3. 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.

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

5. A process for preparing a foam-remover composition as claimed in any one of claims 1-4 comprising the steps of: and uniformly mixing the alkylamine polyether, 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 for water drainage and gas production.

6. Use of a foam-remover composition as claimed in any of claims 1-4.