Foam drainage agent with high temperature resistance, high condensate oil resistance and hypersalinity resistance and preparation method

Abstract

The invention relates to a foam drainage agent with high temperature resistance, high condensate oil resistance and hypersalinity resistance and a preparation method. The foam drainage agent with high temperature resistance, high condensate oil resistance and hypersalinity resistance comprises 60 percent to 40 percent of cocamidopropyl betaine, 40 percent to 20 percent of cocoamido propyl hydroxy sulfobetaine, 20 percent to 10 percent of cocamidopropyl dimethylamine oxide and 10 percent to 5 percent of water. The preparation method comprises the following steps of: respectively and sequentially adding the components into a reaction kettle in percentage by weight; and at normal temperature, stirring for 30 minutes and enabling the materials in the reaction kettle to sufficiently react with each other to obtain the foam drainage agent. The foam drainage agent discloses by the invention has the advantages of high temperature resistance, high condensate oil resistance, hypersalinity resistance, strong liquid carrying capacity and the like and is suitable for various water producing gas wells. The method disclosed by the invention has the characteristics of simplicity for operation, low equipment and environmental requirements, easiness for implementing the industrial production, high product cost performance and the like.

Description

technical field [0001] The invention relates to a novel anti-high temperature, anti-high condensate oil and anti-high salinity foam drainage agent for natural gas wells and a preparation method thereof. Background technique [0002] There are two kinds of liquids produced by natural gas wells, one is free water or hydrocarbon condensate in the formation; the other is natural gas containing water vapor in the formation flowing into the wellbore, the temperature gradually drops along the wellbore due to heat loss, and condensate water appears. If the liquid in the wellbore is not discharged in time, the back pressure at the bottom of the well will increase, resulting in a continuous decline in gas production. Foam drainage gas recovery technology is one of the main means of drainage gas recovery. It is to inject the foam drainage agent into the bottom of the well from the wellhead of the gas well with insufficient liquid-carrying capacity. With the help of the agitation of th...

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Problems solved by technology

With the in-depth development of natural gas wells, the production and transportation of gas wells are currently facing drainage gas recovery problems such as high temperature, high condensate oil content, and high salinity. The existing conventional foam drainage gas recovery technology can no longer be effectively solved, and it is urgent to invent a new Anti-high temperature, anti-high condensate oil, anti-high salinity foam drainage agent

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