A foaming agent with corrosion inhibition function for sour gas field and its preparation and application

A foaming agent, gas field technology, applied in the directions of organic chemistry, drilling composition, chemical instruments and methods, etc. Gas and water quality conditions and other problems, to achieve the effects of good foam stability, good liquid-carrying performance, and strong anti-corrosion ability

Active Publication Date: 2017-11-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the interaction between the foaming agent and the corrosion inhibitor, on the one hand, it will affect the foaming performance of the foaming agent; influence, thus affecting the corrosion protection performance
At the same time, in these reports, there is no mention of specific formulations and applicable air and water quality conditions.

Method used

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  • A foaming agent with corrosion inhibition function for sour gas field and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The molar ratio of 5-isoquinoline sulfonate, p-xylylene dichloride and N,N-dimethyl-N'-lauroyl-1,3-propanediamine is 1.1:1.0:1.1. The first step was reacted at 80°C for 6 hours, and the second step was reacted at 80°C for 4 hours to prepare a foaming agent with a mass concentration of 30%. Take on-site salinity of 293g / L, CaCl 2 Add 0.5 g of the foaming agent (mass percentage concentration: 0.1%) product of the present invention to 500 mL of water-type water sample. The foaming power (initial foam height) measured at 90°C by the Roche method is 108 mm, and the foam stability ( 3min bubble height) 40mm and liquid carrying capacity 142mL / 15min, 80℃, normal pressure, test piece material BG95SS, water phase hydrogen sulfide content 1400ppm, water phase carbon dioxide content 250ppm, the corrosion rate is 0.0383mm / a, and the corrosion inhibition rate is 78.7 %, the test piece is bright.

Embodiment 2

[0021] With the blowing agent that example 1 makes, get on-site salinity 30.76g / L, CaCl 2 Add 0.5 g of the foaming agent (mass percentage concentration: 0.1%) of the water-type water sample to 500 mL. The foaming power (initial foam height) measured by the Roche method at 90 ° C is 230 mm, and the foam stability ( 3min bubble height) 35mm and liquid carrying capacity 135mL / 15min, 80℃, normal pressure, test piece material BG95SS, water phase hydrogen sulfide content 1400ppm, water phase carbon dioxide content 250ppm, the corrosion rate is 0.0398mm / a, and the corrosion inhibition rate is 83.3 %, the test piece is bright.

Embodiment 3

[0023] With the blowing agent that example 1 makes, get on-site salinity 3.34g / L, CaCl 2 Add 0.5 g of the foaming agent (mass percentage concentration: 0.1%) of the water-type water sample to 500 mL. The foaming power (initial foam height) measured by the Roche method at 90 ° C is 145 mm, and the foam stability ( 3min bubble height) 25mm and liquid carrying capacity 130mL / 15min, 80℃, normal pressure, test piece material BG95SS, water phase hydrogen sulfide content 1400ppm, water phase carbon dioxide content 250ppm, the corrosion rate is 0.0158mm / a, and the corrosion inhibition rate is 91.0 %, the test piece is bright.

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Abstract

The invention relates to a foaming agent with corrosion inhibition function for acid gas fields and its preparation and application; 5-isoquinoline sulfonate sodium and p-xylylene Dichloro and N,N-Dimethyl-N′-lauroyl-1,3-propylenediamine, react sodium 5-isoquinoline sulfonate with p-xylylene dichloride at 75℃~90℃ After 5-6 hours, add N,N-dimethyl-N'-lauroyl-1,3-propylenediamine, react at 75°C-90°C for 3.5-4.5 hours, then add deionized water to obtain a content of 30 %~40% foaming agent aqueous solution; the foaming agent has a foaming power of 108mm~255mm, a foam stability of 22mm~55mm, a liquid carrying capacity of 130mL / 15min~148mL / 15min, and a corrosion rate of ≤0.076mm / a.

Description

technical field [0001] The present invention relates to H 2 S and CO 2 Foam drainage and gas production stabilization field in acidic gas fields with water, is a foaming agent with corrosion inhibition function for acid gas fields, preparation method and application in foam drainage gas recovery and anti-corrosion in acid gas fields. Background technique [0002] containing H 2 S and CO 2 The acidic water gas field, in the H 2 S, CO 2 Under the joint action of formation water and formation water, it is highly corrosive to the oil casing, and it is necessary to add corrosion inhibitors for corrosion protection. At the same time, with the development of this type of gas field, when the gas production rate and formation pressure decrease, the liquid-carrying capacity of the gas well will decrease, which will affect the stable production of the gas well due to the formation of liquid accumulation at the bottom of the well and in the tubing. Therefore, it is necessary to inj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/54C09K8/584C07D217/10
Inventor 蒋泽银陈文刘友权谷坛陈楠苏福燕刘爽
Owner PETROCHINA CO LTD
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