A kind of plant gum containing sulfonic acid group and its preparation method and application

A technology of vegetable glue and derivatives, applied in the field of vegetable glue, can solve the problems of high frictional resistance, high viscosity of fracturing fluid base fluid, affecting pump efficiency, etc., and achieve the effect of simple preparation method, good viscoelasticity, and high resistance reduction rate

Active Publication Date: 2020-10-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, as the reservoir conditions in fracturing construction become more and more complex, the vegetable gel thickener obtained by the above modification method cannot meet the requirements of some fracturing reconstructions: for example, in the construction of ultra-high temperature and deep buried reservoirs, HPG, CMHPG The high concentration of the thickening agent causes the viscosity of the fracturing fluid base fluid to be high and the frictional resistance is high, which affects the pump efficiency. Sand-carrying performance of fracturing fluid

Method used

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  • A kind of plant gum containing sulfonic acid group and its preparation method and application
  • A kind of plant gum containing sulfonic acid group and its preparation method and application
  • A kind of plant gum containing sulfonic acid group and its preparation method and application

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Embodiment 1-4

[0026] The vegetable gum containing sulfonic acid groups was prepared according to the conditions shown in Table 1, and the degree of substitution of sulfonic acid groups is shown in Table 2.

[0027] Based on SY / T 5107-2005, prepare the fracturing fluid base fluid with the concentration of 0.30% vegetable gum containing sulfonic acid group with Laizhou Bay seawater, swell at 30°C for 4 hours, prepare 1.0% borax solution with tap water, according to 100: The cross-linked jelly fracturing fluid was prepared at a cross-linking ratio of 4.0, and left at room temperature for 30 minutes. The jelly fracturing fluid was visually observed, and the results are shown in Table 3.

[0028] Based on SY / T 5107-2005, the fracturing fluid base fluid with a sulfonic acid group-containing vegetable gum concentration of 0.60% is prepared with tap water, swelled at 30°C for 4 hours, and the swelled fracturing fluid base fluid is tested, and the results are expressed in Table 4.

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Abstract

The invention relates to a plant gum containing a sulfonic acid group; the sulfonic acid group is located on arbitrary hydroxyl sites of galactomannan and derivatives thereof, the galactomannan and the derivatives thereof are selected from at least one of guar gum, fenugreek gum, sesbania gum, hydroxypropyl guar gum, carboxymethyl hydroxypropyl guar gum, hydroxypropyl fenugreek gum, carboxymethyl fenugreek gum and hydroxyethyl sesbania gum, and the degree of substitution of the sulfonic acid group is 0.20-0.80. The invention also provides a preparation method of the plant gum containing the sulfonic acid group. A fracturing fluid prepared by the plant gum containing the sulfonic acid group has good viscoelasticity.

Description

technical field [0001] The present invention relates to a kind of vegetable glue, more specifically relates to a kind of vegetable glue containing sulfonic acid group. Background technique [0002] Thickener is the main additive in water-based fracturing fluid, and its performance has an important impact on the overall performance of fracturing fluid and the effect of fracturing operation. Especially in the face of reservoir development with high temperature, low permeability, and serious formation sensitivity, it has gradually become the research direction of scholars at home and abroad to seek thickeners with stronger thickening ability, less damage to the formation, and better high temperature stability. Vegetable gum has strong thickening ability, is easy to cross-link into jelly, and has stable performance. It is the main thickener used in fracturing operations at home and abroad. The main types of vegetable gum thickener include guar gum, coriander gum, and Tianqing gu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00C09K8/68C09K8/70
CPCC08B37/0087C08B37/0096C09K8/68C09K8/70C09K2208/28
Inventor 郑承纲赵梦云张锁兵崔佳黄志文孙志宇
Owner CHINA PETROLEUM & CHEM CORP
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