Hydrophobic associated matter and preparation method thereof, and clean diverting acid for fracturing acidizing of heterogeneous carbonate reservoir, and preparation method thereof

A technology of hydrophobic association and diverting acid, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of affecting the effect of deep reformation of acid fracturing, high mass transfer rate, poor retardation performance of acid solution, etc. Achieve the effects of uniform transformation, low emulsification, and low reservoir damage

Active Publication Date: 2019-04-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steering acid has a good steering function, but due to the acid liquid H + The high mass transfer rate leads to poor retarding performance of the acid solution, which in turn affects the effect of deep acid fracturing

Method used

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  • Hydrophobic associated matter and preparation method thereof, and clean diverting acid for fracturing acidizing of heterogeneous carbonate reservoir, and preparation method thereof
  • Hydrophobic associated matter and preparation method thereof, and clean diverting acid for fracturing acidizing of heterogeneous carbonate reservoir, and preparation method thereof
  • Hydrophobic associated matter and preparation method thereof, and clean diverting acid for fracturing acidizing of heterogeneous carbonate reservoir, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The hydrophobic association compound of this embodiment has a structure shown in the following formula:

[0045]

[0046] Where x:y=90:10, the number average molecular weight of the hydrophobic association is 1.1-1.2 million.

[0047] The preparation method of the hydrophobic association compound of this embodiment includes the following steps:

[0048] 1) Add 13.75g of acrylamide, 6.25g of 4-[(heptadefluorononenyl)oxy]benzenesulfonate sodium, 80g of deionized water into the reactor, stir to fully dissolve the raw materials, add an appropriate amount The pH of the NaOH solution adjustment system is 6;

[0049] 2) Then pour nitrogen into the reactor for 30 minutes to remove the oxygen in the reactor, then add 0.034g ammonium persulfate and 0.017g sodium bisulfite to the reactor, stir to fully dissolve it, and place the reactor at 30℃ In the constant temperature water bath, react for 5 hours under the protection of nitrogen atmosphere. After the reaction is completed, filter, pu...

Embodiment 2

[0053] The hydrophobic association compound of this embodiment has a structure shown in the following formula:

[0054]

[0055] Where x:y=95:5, the number average molecular weight of the hydrophobic association compound is 800-900,000.

[0056] The preparation method of the hydrophobic association compound of this embodiment includes the following steps:

[0057] 1) Add 17.19g of acrylamide, 7.81g of 4-[(heptafluorononenyl)oxy]benzenesulfonate sodium, 75g of deionized water into the reactor, stir to fully dissolve the raw materials, add an appropriate amount The pH of the NaOH solution adjustment system is 6;

[0058] 2) Then pour nitrogen into the reactor for 30 minutes to remove the oxygen in the reactor, then add 0.034g ammonium persulfate and 0.017g sodium bisulfite to the reactor, stir to fully dissolve it, and place the reactor at 30℃ In a constant temperature water bath, react for 5 hours under the protection of a nitrogen atmosphere. After the reaction is completed, filter, ...

Embodiment 3

[0062] The hydrophobic association compound of this embodiment has a structure shown in the following formula:

[0063]

[0064] Where x:y=92:8, the number average molecular weight of the hydrophobic association compound is 1 to 1.05 million.

[0065] The preparation method of the hydrophobic association compound of this embodiment includes the following steps:

[0066] 1) Add 15.25g of acrylamide, 7.5g of 4-[(heptafluorononenyl)oxy]benzenesulfonate sodium, 77.25g of deionized water into the reactor, stir to fully dissolve the raw materials, and add an appropriate amount Adjust the pH of the system with the NaOH solution to 6;

[0067] 2) Then pour nitrogen into the reactor for 30 minutes to remove oxygen in the reactor, then add 0.04g ammonium persulfate and 0.02g sodium bisulfite to the reactor, stir to fully dissolve it, and place the reactor at 30°C In the constant temperature water bath, react for 5 hours under the protection of nitrogen atmosphere. After the reaction is complet...

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Abstract

The invention relates to a hydrophobic associated matter and a preparation method thereof, and a clean diverting acid for fracturing acidizing of a heterogeneous carbonate reservoir, and a preparationmethod thereof, and belongs to the technical field of oilfield chemical industry, wherein the hydrophobic associated matter has a structure represented by a formula (1) x:y is 90-95:5-10, and the hydrophobic associated matter has a weight average molecular weight of 800000-1200000. The preparation method comprises: uniformly mixing 13-17 parts by weight of acrylamide, 7-8 parts by weight of sodium 4-Heptadecafluorononenyloxybenzenesulphonate and water, adjusting the pH value to 6-7, adding 0.04-0.05 part of a redox initiator, and carrying out a reaction for 5-7 h at a temperature of 30-40 DEGC under inert gas protection. According to the present invention, the hydrophobic associated matter as the diverting agent of the clean diverting acid system has the hydrophobic group and the fluorocarbon group, such that the viscosity and the retarding performance of the acid liquid system at the high temperature are improved so as to meet the deep penetration requirements of fracturing acidizing construction.

Description

Technical field [0001] The invention relates to a hydrophobic association compound and a preparation method thereof, a clean diverting acid for acid fracturing of a heterogeneous carbonate reservoir and a preparation method thereof, and belongs to the technical field of oil field chemical industry. Background technique [0002] Acid fracturing is an important means for increasing production of carbonate reservoirs. For heterogeneous carbonate reservoirs, the conventional acid fracturing / acidification process acid system not only makes it difficult to uniformly reform the reservoir, but will increase permeability. The rate difference has aggravated the contradictions within the strata. Therefore, the acid fracturing of heterogeneous carbonate reservoirs should select a liquid system that does not pollute the reservoir, has good retarding performance, and can automatically turn to act on reservoirs with different permeability. On the one hand, its viscosity increasing function can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F214/18C08F4/40C09K8/74
CPCC08F4/40C08F220/56C09K8/725C09K8/74C08F214/186
Inventor 王栋苏君慧陈灿魏美涛刘晓敏蔡树行褚红玉张社朝
Owner CHINA PETROLEUM & CHEM CORP
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