Gas field foam water drainage bar and preparation method thereof

A foam drainage and gas field technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of reduced foaming performance and liquid-carrying performance, inability to meet on-site use, etc., and achieves improved foaming effect and simplified drilling. The medicine operation process, the effect of high foaming ability

Inactive Publication Date: 2016-12-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that the foaming performance and liquid-carrying performance of the existing foam discharge agent are greatly reduced under complex conditions, and even cannot meet the needs of on-site use, simplify the actual dosing operation process of the gas well, improve the foaming effect and transportation efficiency, and improve Foam Drainage Efficiency at High Salinity, Methanol and Condensate

Method used

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  • Gas field foam water drainage bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a gas field foam drainage rod, and the gas field foam drainage rod is made of the following components by mass percentage:

[0030] Fatty acid betaine derivatives 80~95%, fatty acid betaine derivatives are lauric acid amidopropyl betaine, coco amidopropyl betaine, cis-9-octadecenoic acid aminopropyl betaine, lauric acid imidazole One or more of phenoline betaine and cis-9-octadecenoic acid imidazoline betaine are mixed in any proportion, and the aqueous solution mixture is obtained through powder spraying and drying to obtain a solid powder;

[0031] Polyvinyl alcohol 0.1-5%, polyvinyl alcohol is one of polyvinyl alcohol 1755, polyvinyl alcohol 1788, polyvinyl alcohol 2455, polyvinyl alcohol 2488, soluble polyvinyl alcohol fiber;

[0032] Polyvinylpyrrolidone 0.01-1.0%, the polyvinylpyrrolidone model is K30, and the polyvinylpyrrolidone is a solution dissolved in a mixed solvent of ethanol and water, wherein the volume ratio of the mixed solvent...

Embodiment 2

[0036] This embodiment provides a method for preparing a gas field foam drainage rod, and the preparation process is as follows:

[0037] Step 1: spraying and drying the fatty acid betaine derivative solution to obtain a solid powder;

[0038] Step 2: Mix the solid powder obtained in step 1 with polyvinyl alcohol and sodium carboxymethyl cellulose in a blender in proportion, and the fatty acid betaine derivatives, polyvinyl alcohol and sodium carboxymethyl cellulose in the obtained mixture The mass-number ratio is 60-90 parts: 0.1-5 parts: 0.1-5 parts;

[0039] Step 3: Dissolving the polyvinylpyrrolidone in a mixed solvent of ethanol and water, the mass ratio of polyvinylpyrrolidone is 0.01 to 1.0 parts, and then evenly spraying on the solid surface in step 3, wherein the volume ratio of the mixed solvent of ethanol and water is V 乙醇 :V 水 =5~9:1, the dissolved concentration of polyvinylpyrrolidone is 0.1~5wt%;

[0040] Step 4: After the mixture in Step 3 is bonded, transfer...

Embodiment 3

[0043] Weigh 6000g lauric amidopropyl betaine (30%wt), 1500g cocoamidopropyl betaine (30%wt), 1400g cis-9-octadecenoylaminopropyl betaine (30%wt) , 500g of imidazoline laurate betaine (30%wt) were mixed evenly, and spray-dried by a spray dryer to obtain white powder betaine; V (ethanol): V (water) = 6:1 was used as a solvent to prepare 1% polyethylene pyrrolidone solution.

[0044] Weigh 900g of the above-mentioned powder betaine, add 45g of polyvinyl alcohol 1755, 30g of sodium carboxymethylcellulose, 15g of soluble polyvinyl alcohol fiber (length 4-6mm), 10g of 1% polyvinylpyrrolidone solution, according to the method of Example 2 , made into a diameter of 40mm and a length of 400mm, and vacuum-dried at 50°C to obtain a foam drainage rod.

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Abstract

The invention relates to a gas field foam water drainage bar and a preparation method thereof, in particular to an amphoteric foam water drainage bar resistant to mineralization, methyl alcohol and gas condensate. The gas field foam water drainage bar is suitable for foam water drainage of various gas wells and capable of effectively removing liquid accumulated at the bottom of a well and increasing the gas output. The gas field foam water drainage bar is prepared from a fatty acid glycine betaine derivative, polyvinyl alcohol, polyvinyl pyrrolidone, sodium carboxymethylcellulose and water. According to the gas field foam water drainage bar and the preparation method thereof, the problem that the foaming performance and liquid carrying performance of an existing foam drainage agent under complex conditions are greatly reduced or even can not meet field use is solved, the foaming effect is improved, the foam water drainage efficiency under high mineralization, methyl alcohol and gas condensate is improved, and the foam water drainage bar is high in foaming capability and is not influenced by high mineralization, methyl alcohol and gas condensate, and operation is easy and safe.

Description

technical field [0001] The invention relates to a gas field foam drainage rod and a preparation method thereof, in particular to an amphoteric foam drainage rod resistant to salinity, methanol and condensate oil, which is suitable for foam drainage of various gas wells and can effectively clean wells Bottom fluid accumulation, increase gas production. Background technique [0002] Fluid flooding in gas wells can create unstable slug flow and lead to a decline in gas well production. If the wellbore fluid cannot be removed continuously, it may eventually lead to low gas well production or even stop production. If the production of the gas well is high enough to carry most or all of the liquid out of the wellbore, the formation pressure and production will remain stable, and the production of the gas well can be predicted by the inflow performance curve of the gas well. [0003] If the production of the gas well is too low, the fluid accumulation at the bottom of the well wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/588
CPCC09K8/584C09K8/588
Inventor 田伟付钢旦黄依理刘双全万华贾友亮惠艳妮窦淼杨亚聪李辰李旭日崔丽春姬文钰
Owner PETROCHINA CO LTD
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