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The method of liquid drainage and gas recovery using solid foam discharge agent composition

A technology for discharging liquid and producing gas and foam discharging agent, which is applied in the directions of drilling composition, production fluid, chemical instrument and method, etc., can solve the problems of gas well production reduction, difficulty, and stop-spraying liquid injection, etc.

Active Publication Date: 2021-07-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing sour gas wells have too much liquid accumulation during the development process, which leads to the production reduction or even stop spraying of the gas wells and the difficulty of liquid injection. The method, especially a kind of sour gas well adopts the method of liquid drainage and gas production of solid foam drainage agent composition, which is used for gas well drainage and gas recovery, which can carry liquid efficiently, and has good acid resistance, foaming performance and liquid carrying capacity

Method used

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  • The method of liquid drainage and gas recovery using solid foam discharge agent composition
  • The method of liquid drainage and gas recovery using solid foam discharge agent composition
  • The method of liquid drainage and gas recovery using solid foam discharge agent composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) At normal temperature and pressure, mix 10 grams of alkylamine, 25 grams of long-chain polyether nitrogen-containing compound, and 35 grams of sodium sulfate

[0041] evenly, to get a mixture;

[0042] (2) 0.1 gram of polyacrylamide is added with 1 gram of water and stirred until completely dissolved to obtain a binder solution;

[0043] (3) The mixture obtained in step (1) and the binder solution obtained in step (2) were uniformly mixed, and pressed to form a solid foam drainage stick FS-1, whose component structure is shown in Table 1.

Embodiment 2

[0045] (1) Under normal temperature and pressure, mix 5 grams of alkylamines, 50 grams of long-chain polyether nitrogen-containing compounds, 30 grams of sodium sulfate, 10 grams of sodium carbonate, 30 grams of sodium bicarbonate, and 30 grams of urea to obtain a mixture ;

[0046] (2) Add 0.5 g of polyethylene glycol with 2 g of water and stir until completely dissolved to obtain a binder solution;

[0047] (3) The mixture obtained in step (1) and the binder solution obtained in step (2) were mixed evenly, and pressed to form a solid foam drainage rod FS-2, whose component structure is shown in Table 1.

Embodiment 3

[0049] (1) Under normal temperature and pressure, 50 grams of alkylamine, 10 grams of long-chain polyether nitrogen-containing compound, 10 grams of urea, and 1 gram of citric acid were uniformly mixed to obtain a mixture;

[0050] (2) Add 0.1 g of starch and 2 g of water and stir until completely dissolved to obtain a binder solution;

[0051] (3) The mixture obtained in step (1) and the binder solution obtained in step (2) were uniformly mixed, and pressed to form a solid foam drainage rod FS-3, whose component structure is shown in Table 1.

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Abstract

The invention relates to a method for liquid drainage and gas recovery using a solid foam discharge agent composition. It mainly solves the problems of excessive liquid accumulation in the development process of existing sour gas wells, which leads to the reduction of production of gas wells or even the suspension of spraying and the difficulty of adding liquid foam drainage agents. The present invention comprises the steps of: 1) putting the foam discharge agent composition into a water-containing gas well; 2) fully contacting the foam discharge agent composition with gas and water or an oil-water mixture in the water-containing gas well to form Foam fluid, then the foam fluid is lifted to the ground; wherein, the solid foam discharge agent composition includes the following components: 1 part has the alkylamine of general molecular formula shown in formula (I); 0.1~50 parts have The technical solution of the long-chain polyether nitrogen-containing compound with the general molecular formula shown in formula (II); 0.2-100 parts of solid filler; 0-0.5 parts of binder solves this problem well, and can be used for gas well drainage and gas recovery In process.

Description

technical field [0001] The invention relates to a method for liquid drainage and gas recovery using a solid foam drainage agent composition, in particular to a method for acid gas wells using a solid foam drainage agent composition to drain fluid and gas recovery. 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. Foam drainage is to inject a foaming agent into the well through the tubing or tubing annulus, and generate foam with certain stability under the agitation of the air flow. The liquid phase deposited by slippage in the pipe turns into foam, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22C09K8/584
CPCC09K8/584E21B43/16
Inventor 何秀娟刘通沈之芹张慧李斌
Owner CHINA PETROLEUM & CHEM CORP
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