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Environment-friendly polymer thickening agent for fracturing and preparation method thereof

An environment-friendly, polymer technology, applied in the field of oil field fracturing, can solve the problems of affecting the fracturing effect, the polymer thickener has poor temperature resistance and salt resistance, and achieves the effect of strong antibacterial ability

Pending Publication Date: 2017-05-10
西安长庆化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the polymer thickener used for fracturing has poor temperature resistance and salt resistance, which affects the fracturing effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides an environmentally friendly polymer thickener for fracturing, which consists of deionized water, acrylamide, N-methylolacrylamide, 1,4-butanediol, glycerol, n-stearyl alcohol , Sodium allyloxy hydroxypropyl sulfonate, sodium methacrylate hydroxypropyl sulfonate, cross-linking inhibitor, 2-acrylamide-2-methylpropanesulfonic acid, initiated by polymerization.

[0038] Raw material parts by weight are composed as follows:

[0039] 600-700 parts of deionized water;

[0040] 150-220 parts of acrylamide;

[0041] 24-48 parts of sodium allyloxy hydroxypropyl sulfonate;

[0042] 20-40 parts of sodium hydroxypropyl sulfonate methacrylate;

[0043] 15-28 parts of N-methylolacrylamide;

[0044] 8-10 parts of n-stearyl alcohol;

[0045] 2-6 parts of 2-acrylamide-2-methylpropanesulfonic acid;

[0046] 2-5 parts of 1,4-butanediol;

[0047] 1-6 parts of cross-linking inhibitor;

[0048] 1-3 parts of glycerol;

[0049] Initiator 0.2-0.8 parts.

[0050...

Embodiment 2

[0054] This example provides a method for using an environmentally friendly polymer thickener for fracturing. The above-mentioned environmentally friendly polymer thickener for fracturing is used for cross-linking with a special cross-linking agent. The amount of cross-linking used is: 100mL of 0.2-0.3% thickener solution, add 0.3-0.5mL of special cross-linking agent.

[0055] The special cross-linking agent is octadecyltrimethylammonium chloride solution, and the octadecyltrimethylammonium chloride solution is octadecyltrimethylammonium chloride, water and ethanol according to the mass ratio of octadecyl Trimethylammonium chloride: water: ethanol = 40:55:5.

[0056] The use method of this invention combined with a special crosslinking agent can make the viscosity of the thickener significantly increase and have sand-carrying ability.

Embodiment 3

[0058] This embodiment provides a method for preparing an environmentally friendly polymer thickener for fracturing, comprising the following steps:

[0059] Step 1: Add 600 to 700 parts by weight of deionized water, 150 to 220 parts by weight of acrylamide, 24 to 48 parts by weight of allyloxy hydroxypropyl sodium sulfonate, 20 to 40 parts by weight of methacrylic acid hydroxyl Sodium propylsulfonate, 15-28 parts by weight of N-methylolacrylamide, 8-10 parts by weight of n-octadecyl alcohol, 2-6 parts by weight of 2-acrylamide-2-methylpropanesulfonic acid, 2-5 Parts by weight of 1,4-butanediol, 1-6 parts by weight of a crosslinking inhibitor, and 1-3 parts by weight of glycerol, adjusting the pH value to 7.5;

[0060] Step 2: Put the reactor in step 1 into the refrigerator to cool down, take out the reaction liquid after it is cooled to 2-5°C, and pass nitrogen gas into the reaction liquid for 30 minutes; then add 0.2-0.8 parts by weight of initiator, and continue to pass nit...

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Abstract

The invention belongs to chemicals in the field of oil field fracturing and particularly relates to an environment-friendly polymer thickening agent for fracturing and a preparation method thereof. The thickening agent is prepared from deionized water, acrylamide, N-hydroxymethyl acrylamide, 1,4-butanediol, glycerol, octadecanol, KD AHPS, HMPS, a cross-linking inhibitor and 2-acrylamide-2-methylpropanesulfonic acid through induced polymerization. The thickening agent can be cross-linked with a special cross-linking agent, the viscosity is obviously increased, and the thickening agent has the sand-carrying capacity. A polymer aqueous solution prepared with formation water can guarantee the use effect at the concentration of 0.2-0.3%, and the problems that a polymer thickening agent is poor in temperature resistance, shear resistance and salt resistance are solved.

Description

technical field [0001] The invention belongs to the chemical agent in the technical field of oil field fracturing, and in particular relates to an environment-friendly polymer thickener for fracturing and a preparation method thereof. Background technique [0002] At present, the most popular and mature fracturing technology in various domestic oil fields is still the use of guar gum fracturing fluid system. The source of guar gum is mainly imported from India, Pakistan and other countries. Due to the influence of natural climate conditions, its output fluctuates Larger, the price also has a larger change. [0003] In recent years, polymers used in fracturing have also appeared on the market, but the technology is still immature and has many defects, such as poor high temperature resistance of jelly, poor resistance to high salinity, uncontrollable crosslinking time, The glue is not completely broken. Contents of the invention [0004] The purpose of the invention is to ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F216/14C08F220/38C08F220/58C09K8/68
CPCC08F220/56C09K8/685C09K8/882C09K8/887C08F216/1475C08F220/382C08F220/58C08F220/585
Inventor 郝宗香朱趁安王卫军章洋阳程芳魏晋海尚正华郭军曹效东程晓亮吕俊华
Owner 西安长庆化工集团有限公司
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