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Reinforced salt-resistant and oil-resistant foam drainage agent composition as well as preparation method and application thereof

A technology of foam drainage agent and composition, which is applied in the direction of drilling composition, chemical instruments and methods, etc., and can solve the problem of insufficient salt resistance and oil resistance of foam drainage agent, insufficient foam generation ability of foam drainage agent, and discharge liquid treatment Difficulties and other problems, to achieve the effects of saving pharmaceutical costs, enhancing liquid-carrying ability, and good foaming ability

Active Publication Date: 2020-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that for gas wells with low gas production in the middle and later stages of development in the prior art, the foam generation capacity of the foam discharge agent is insufficient, and the liquid-carrying efficiency is low, and the problem of the existing gas well development process in the prior art There are many problems in the self-generating foam drainage method, such as large amount of chemicals used, high cost, and difficult disposal of effluent, and for low-pressure condensate oil and gas wells, the problem of insufficient salt resistance and oil resistance of traditional foam drainage agents, providing a drainage gas recovery The enhanced salt-resistant and oil-resistant foam drainage composition has the advantages of good foam generation ability and high liquid-carrying efficiency in gas wells with low gas production, and has the advantages of low dosage, low cost and easy liquid drainage treatment , and the advantages of high salt resistance and oil resistance

Method used

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  • Reinforced salt-resistant and oil-resistant foam drainage agent composition as well as preparation method and application thereof
  • Reinforced salt-resistant and oil-resistant foam drainage agent composition as well as preparation method and application thereof
  • Reinforced salt-resistant and oil-resistant foam drainage agent composition as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0037] Under normal temperature and pressure, the alkylamide polyether anionic surfactant, α-olefin sulfonate, ammonium chloride, and sodium nitrite were mixed at a salinity of 100,000 and 200,000 according to a mass ratio of 1:2:1:1, respectively. , 250,000mg / L simulated aqueous solution was dissolved to prepare a 1.0wt% solution. The resulting foam drainage composition FS-1. The structure of the surfactant component is shown in Table 1.

Embodiment 2

[0039] Under normal temperature and pressure, the alkylamide polyether anionic surfactant, α-olefin sulfonate, ammonium chloride, and sodium nitrite were mixed at a salinity of 100,000 and 200,000 according to a mass ratio of 1:10:5:5, respectively. , 250,000mg / L simulated aqueous solution was dissolved to prepare a 1.0wt% solution. The resulting foam drainage composition FS-2. The structure of the surfactant component is shown in Table 1.

Embodiment 3

[0041] Under normal temperature and pressure, the alkylamide polyether anionic surfactant, α-olefin sulfonate, ammonium chloride, and sodium nitrite were mixed at a salinity of 100,000 and 200,000 according to a mass ratio of 1:1:5:5, respectively. , 250,000mg / L simulated aqueous solution was dissolved to prepare a 1.0wt% solution. The resultant foam drainage agent composition FS-3. The structure of its surfactant component is shown in Table 1.

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Abstract

The invention relates to a reinforced salt-resistant and oil-resistant foam drainage agent composition as well as a preparation method and application thereof. The problems that in the low-pressure condensate oil gas well development process, an existing foam drainage agent is insufficient in formed foam gas amount, insufficient in oil resistance and poor in foam drainage performance, and consequently liquid accumulation at the bottom of a well, gas well production reduction and even blowout stop are caused are mainly solved. The foam drainage agent composition comprises the following components in parts by mass: 1 part of an alkyl amide polyether anionic surfactant with a molecular general formula shown in a formula (I); 0.1 to 50 parts of alpha-olefin sulfonate; 0.1 to 100 parts of a strengthening auxiliary agent A; and 0.1 to 100 parts of a strengthening auxiliary agent B. The problems are well solved, and the composition can be applied to the low-pressure condensate oil gas well drainage gas recovery industry.

Description

technical field [0001] The invention relates to an enhanced salt-resistant and oil-resistant foam drainage composition and its preparation method and application, in particular to a foam drainage composition for low-pressure condensate-containing oil and gas wells, a preparation method and its application. Background technique [0002] As gas field mining enters the later stage of development, gas production pressure gradually decreases, water-producing gas wells increase year by year, and wellbore fluid accumulation becomes more and more serious, resulting in continuous decline in gas well production, and even water flooded wells, which has become a key problem 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 produ...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/60C09K8/94
CPCC09K8/584C09K8/604C09K8/94
Inventor 马俊伟何秀娟裘鋆许晓菁
Owner CHINA PETROLEUM & CHEM CORP
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