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Condensate-oil-resistant efficient foam scrubbing rod and preparation method thereof

A technology for foaming rods and condensate oil, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve problems such as loss of foaming ability, liquid carrying capacity of foaming rods, influence of foam stability, and inappropriateness , to achieve the effect of good salt resistance, excellent synergistic effect and good foaming

Pending Publication Date: 2020-07-17
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General foam rods have good foam performance in fresh water and mineralized water, but they are not suitable for gas wells with high condensate oil content. The liquid carrying capacity and foam stability of foam rods are seriously affected by condensate oil. Loss of foaming ability at high oil content

Method used

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  • Condensate-oil-resistant efficient foam scrubbing rod and preparation method thereof
  • Condensate-oil-resistant efficient foam scrubbing rod and preparation method thereof
  • Condensate-oil-resistant efficient foam scrubbing rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 30g of dodecyl dimethyl sulfopropyl betaine, 3g of perfluorooctyl polyoxyethylene ether (TF328), and 5g of xanthan gum evenly to obtain a condensate-resistant high-efficiency foam discharge stick;

[0020] A preparation method of a condensate-resistant high-efficiency foam row rod is as follows:

[0021] (1) Pour dodecyl dimethyl sulfopropyl betaine into the container, stir, and then add perfluorooctyl polyoxyethylene ether and xanthan gum into the container successively, stir for 25min, make it uniform, get mixed material;

[0022] (2) The mixed material is left to stand, and the mixed material after standing is put into a press, and under a pressure of 7.5Mpa, it is pressed into a rod-shaped solid to obtain a density of 1.35g / cm 3 Condensate-resistant high-efficiency foam row rod.

Embodiment 2

[0024] Mix 30g of dodecyldimethylsulfopropyl betaine, 3.75g of perfluorooctyl polyoxyethylene ether (TF328), and 5g of xanthan gum evenly to obtain a condensate-resistant high-efficiency foam discharge stick;

[0025] A preparation method of a condensate-resistant high-efficiency foam row rod is as follows:

[0026] (1) Pour dodecyl dimethyl sulfopropyl betaine into the container and stir, then add perfluorooctyl polyoxyethylene ether and xanthan gum into the container in turn, stir for 27min to make it uniform, get mixed material;

[0027] (2) The mixed material is left to stand, and the mixed material after standing is put into a press, and under a pressure of 8Mpa, it is pressed into a rod-shaped solid to obtain a density of 1.43g / cm 3 Condensate-resistant high-efficiency foam row rod.

Embodiment 3

[0029] Mix 30g of dodecyldimethylsulfopropyl betaine, 2.5g of perfluorooctyl polyoxyethylene ether (TF328), and 6.5g of xanthan gum evenly to obtain a condensate-resistant high-efficiency foam discharge stick;

[0030] A preparation method of a condensate-resistant high-efficiency foam row rod is as follows:

[0031] (1) Pour dodecyl dimethyl sulfopropyl betaine into the container and stir, then add perfluorooctyl polyoxyethylene ether and xanthan gum into the container in turn, stir for 30min to make it uniform, get mixed material;

[0032] (2) Put the mixed material to stand still, put the mixed material after standing in a press, and press it into a rod-shaped solid under a pressure of 6.0Mpa to obtain a density of 1.20g / cm 3 Condensate-resistant high-efficiency foam row rod.

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Abstract

The invention discloses a condensate-oil-resistant efficient foam scrubbing rod. The condensate-oil-resistant efficient foam scrubbing rod is composed of dodecyl dimethyl sulfopropyl betaine, perfluorooctyl polyoxyethylene ether and xanthan gum, wherein the mass ratio of the dodecyl dimethyl sulfopropyl betaine to the perfluorooctyl polyoxyethylene ether is (8-12):1, and the addition amount of thexanthan gum is 10-20% of the total mass of the dodecyl dimethyl sulfopropyl betaine and the perfluorooctyl polyoxyethylene ether. The condensate-oil-resistant efficient foam scrubbing rod provided bythe invention has relatively good foaming, foam stabilizing and foam carrying capacities in a range of 0-30% of condensate oil, is good in compatibility with formation water, and has quite good saltresistance, methanol resistance and calcium and magnesium ion resistance.

Description

technical field [0001] The invention belongs to the field of natural gas exploitation, and in particular relates to a condensate oil-resistant high-efficiency foam row rod for oil and gas wells. Background technique [0002] Oil and gas wells are in the middle and late stages of development. Due to the reduction of formation pressure, the advancement of edge and bottom water, fracturing, acidification and other operational measures, fluid accumulation occurs at the bottom of the well and in the wellbore, which reduces or even stops the production of natural gas. In order to increase oil and gas production, it is necessary to Foam drainage is a good way to get rid of bottom fluid. Foam drainage gas recovery has the advantages of simple equipment, convenient construction, low cost, wide range of applicable well depths, and no influence on normal production of gas wells. Applications. There are many kinds of existing foaming agents, and generally the foaming ability and foam ...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/60C09K8/90C09K8/92
CPCC09K8/584C09K8/602C09K8/604C09K8/905C09K8/92
Inventor 孙玉鹏闫旭涛张颖许磊周渝
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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