Salt-resistant acid-resistant drainage foam discharge agent composition for gas recovery and its preparation method and application

A technology of water drainage and gas recovery and foaming agent, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of gas well production reduction, excessive fluid accumulation in gas wells, stop spraying, etc., and achieve increased viscosity and good technical effects , enhance the effect of stability

Active Publication Date: 2021-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that the existing gas wells have too much fluid accumulation during the development process, which leads to the production reduction or even stop blowout of the gas wells. It provides a high-efficiency liquid-carrying foam drainage agent composition for gas wells, which has good Salt resistance, acid resistance, foaming performance and liquid carrying capacity

Method used

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  • Salt-resistant acid-resistant drainage foam discharge agent composition for gas recovery and its preparation method and application
  • Salt-resistant acid-resistant drainage foam discharge agent composition for gas recovery and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation of composition XN-1, preparation steps:

[0038] (1) Synthesis of imidazoline type amphoteric surfactant

[0039] a. Add 25 grams of C to the reactor 12 h 25 COOH and 10 grams of hydroxyethylethylenediamine were heated up to 100°C, and the vacuum degree of the reactor was adjusted to a water outlet state, and then the temperature was continued to rise to 200°C, and the reaction was carried out for 6 hours, and the reaction was stopped to obtain an imidazoline intermediate;

[0040]B, the imidazoline intermediate obtained by 15 grams of reaction and 7.5 grams of sodium chloroacetate were added in the reactor, and reacted for 5 hours at 80° C. to obtain the described imidazoline type amphoteric surfactant;

[0041] (2) Preparation of foam discharge agent composition

[0042] The imidazoline type amphoteric surfactant, AOS 14-16 and silicon dioxide in a mass ratio of 1:1:1 in water with a salinity of 50,000mg / L and a pH value of 7, mix well, and prepare...

Embodiment 2

[0044] The preparation of composition XN-2, preparation steps:

[0045] (1) Synthesis of imidazoline type amphoteric surfactant

[0046] a. Add 23 grams of C to the reactor 14 h 27 COOH and 10 grams of hydroxyethylethylenediamine were heated up to 100°C, and the vacuum degree of the reactor was adjusted to a water outlet state, and then the temperature was continued to rise to 200°C, and the reaction was carried out for 6 hours, and the reaction was stopped to obtain an imidazoline intermediate;

[0047] B, 15 grams of imidazoline intermediates obtained by the reaction and 10 grams of sodium chloropropylsulfonate were added to the reactor, and reacted for 6 hours at 80° C. to obtain the described imidazoline type amphoteric surfactant;

[0048] (2) Preparation of foam discharge agent composition

[0049] The imidazoline type amphoteric surfactant, AOS 14-18 Dissolve silicon dioxide and silicon dioxide in water with a salinity of 150,000mg / L and a pH value of 3 at a mass ra...

Embodiment 3

[0051] Preparation of composition XN-3, preparation steps:

[0052] (1) Synthesis of imidazoline type amphoteric surfactant

[0053] a. Add 18 grams of C to the reactor 10 h 21 COOH and 10 grams of hydroxyethylethylenediamine were heated up to 100°C, and the vacuum degree of the reactor was adjusted to a water outlet state, and then the temperature was continued to rise to 200°C, and the reaction was carried out for 6 hours, and the reaction was stopped to obtain an imidazoline intermediate;

[0054] B, 15 grams of the imidazoline intermediate obtained by the reaction and 8.5 grams of sodium chloropropionate were added to the reactor, and reacted for 3 hours at 100° C. to obtain the described imidazoline type amphoteric surfactant;

[0055] (2) Preparation of foam discharge agent composition

[0056] The imidazoline type amphoteric surfactant, AOS 16-18 and silicon dioxide in a mass ratio of 1:2:3 in water with a salinity of 80,000mg / L and a pH value of 5, mix well, and pr...

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Abstract

The invention relates to a salt-resistant and acid-resistant drainage foaming agent composition for gas recovery, a preparation method and application thereof. It mainly solves the problem of excessive liquid accumulation in the development process of existing gas wells, which leads to the reduction of production or even the suspension of blowout of gas wells. Including the following components by mass fraction: (1) 1 part of imidazoline type amphoteric surfactant; (2) 0.2 to 20 parts of α-olefin sulfonate; (3) 0-10 parts of nanoparticles; wherein The imidazoline type amphoteric surfactant has molecular general formula shown in formula (I), described R 1 for C 8 ~C 30 fat base; R 2 for C 1 ~C 5 Any one of the alkylene or substituted alkylene; Y is the technical scheme of the anionic group that makes the molecules shown in formula (I) be electrically neutral, which solves this problem better, and can be applied to high salt content Drainage and gas recovery in sour gas fields.

Description

technical field [0001] The invention relates to a salt-resistant and acid-resistant drainage foaming agent composition for gas recovery, a preparation method and application thereof, and belongs to the technical field of chemical agents for oil and gas fields. Background technique [0002] With the intensification of gas field exploitation, water production from gas fields has become a key issue restricting the normal production of gas wells. Foam drainage gas recovery is a drainage gas recovery technology developed rapidly at home and abroad in recent years. It has the advantages of simple equipment, convenient construction, low cost, wide range of applicable well depths, and does not affect the normal production of gas wells. The so-called foam drainage is to introduce some surfactants with special functions into the mineralized water at the bottom of the well, so that a large amount of low-density water-containing foam is produced during the vertical flow of gas-liquid tw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
CPCC09K8/584C09K2208/10
Inventor 裘鋆何秀娟沈之芹马俊伟
Owner CHINA PETROLEUM & CHEM CORP
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