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Wax inhibitor added during fracturing construction and preparation method and application thereof

A kind of anti-wax agent, flat technology, applied in the field of anti-wax agent added during fracturing construction and its preparation, can solve the problems of high construction cost and long cycle, and achieve the advantages of convenient construction, long effective time and enlarged range of action Effect

Active Publication Date: 2018-11-30
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wax inhibitors currently used all need to be constructed separately, the cycle is long, and the construction cost is high, which has become a bottleneck restricting its application.

Method used

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  • Wax inhibitor added during fracturing construction and preparation method and application thereof
  • Wax inhibitor added during fracturing construction and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A wax inhibitor added during fracturing, based on 100%, is composed of the following raw materials by weight percentage: sodium stearate 18%, flat addition of 0-25 15%, fatty alcohol polyoxyethylene ether sodium sulfate AES 12 %, 10% sodium dodecylbenzene sulfonate ABS, 1% sodium ethylenediaminetetraacetate, 2% rosin powder, 42% quartz sand through 70-100 mesh sieve;

[0032] The preparation method of the above wax inhibitor includes the following steps:

[0033] (1) Add sodium stearate, flat addition O-25, fatty alcohol polyoxyethylene ether sodium sulfate AES, sodium dodecylbenzene sulfonate ABS, sodium ethylenediaminetetraacetate, and rosin powder into the reaction kettle according to the proportions. In the medium, heat and stir at a temperature of 80°C until all is dissolved before use;

[0034] (2) Heat the quartz sand to 50°C while stirring in the dry powder mixer, stop heating, continue stirring, and slowly add the product of step (1) under stirring, subject to the pr...

Embodiment 2

[0038] A wax inhibitor added during fracturing, based on 100%, is composed of the following raw materials by weight percentage: sodium stearate 10%, flat addition of 0-25 10%, fatty alcohol polyoxyethylene ether sodium sulfate AES 15 %, 10% sodium dodecylbenzene sulfonate ABS, 1% sodium ethylenediaminetetraacetate, 1% rosin powder, 53% of quartz sand passing a 70-100 mesh sieve;

[0039] The preparation method of the above wax inhibitor is the same as in Example 1.

Embodiment 3

[0041] A wax inhibitor added during fracturing, based on 100%, is composed of the following raw materials in weight percentage: sodium stearate 20%, flat addition of 0-25 15%, fatty alcohol polyoxyethylene ether sodium sulfate AES 15 %, sodium dodecylbenzene sulfonate ABS 5%, sodium ethylenediaminetetraacetate 1%, rosin powder 2%, 42% quartz sand passing through a 70-100 mesh sieve;

[0042] The preparation method of the above wax inhibitor is the same as in Example 1.

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Abstract

The invention provides a wax inhibitor added during fracturing construction. The wax inhibitor is prepared from the following raw materials in percentage by weight: 10%-20% of sodium stearate, 10%-20%of peregal O-25, 10%-15% of fatty alcohol polyoxyethylene lauryl ether sulfate sodium AES, 5%-10% of sodium dodecyl benzene sulfonate ABS, 0.5%-1% of ethylenediamine traacetic acid, 1%-2% of rosin powder, and the balance of quartz sand. Meanwhile, the invention also provides a preparation method and application of the wax inhibitor. The wax inhibitor provided by the invention does not need separate construction, is added during fracturing construction and can penetrate through the distal end of stratum, so that the action range of the wax inhibitor in the stratum is enlarged, the effective time is long, and the wax inhibitor can be slowly released in the stratum at 30 DEG C for about 2 years; wax inhibition is carried out before crude oil production, so that the source of wax production is directly cut off, and the generation of wax is fundamentally prevented; construction is convenient and construction cost is reduced.

Description

Technical field [0001] The invention belongs to the technical field of petrochemical industry, and specifically relates to a paraffin inhibitor added during fracturing construction and a preparation method and application thereof. Background technique [0002] When crude oil is not exploited, it has been in the formation, and the temperature and pressure of the surrounding environment are relatively high. Some high-carbon alkanes are dissolved in the crude oil in liquid phase, such as wax, gum and asphaltene. During the development process, the crude oil flows from the formation gap to the bottom of the well, and then is pumped from the bottom of the well to the wellhead. The temperature and pressure of the surrounding environment will continuously decrease. As the pressure decreases, some of the crude oil Light components will escape in the form of gas, and wax crystal molecules will precipitate out with the continuous decrease of the ambient temperature and pressure of the crud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/06E21B43/26C09K8/524
CPCC09K8/524E21B37/06E21B43/26
Inventor 张军涛吴金桥王卫刚周伟勤郭庆高志亮张锋三李彦林黄华杨先伦
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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