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A low-friction fluid loss reducer and its preparation method and application

A fluid loss reducer and low friction technology, which is applied in the field of low friction fluid loss reducer and the preparation of low friction fluid loss reducer used in horizontal wells in the process of oil drilling, can solve the problem of reducing fluid loss, It is impossible to take into account low friction and other issues at the same time, to achieve low adhesion coefficient, obvious effect of reducing filtration loss, and solving the effect of reducing filtration loss

Active Publication Date: 2017-06-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0033] The purpose of the present invention is to solve the problem that low friction cannot be taken into account while effectively reducing fluid loss, and to provide a low friction fluid loss reducer and its preparation method and application

Method used

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  • A low-friction fluid loss reducer and its preparation method and application

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preparation example Construction

[0040] The invention provides a method for preparing a low-friction fluid loss reducer, which comprises the following steps: (1) dissolving vinyl monomers in water, and adjusting the pH value to obtain a mixed solution with a pH value of 8-12; (2) surfactant, liquid oil phase and initiator are added in the mixed solution that step (1) obtains and mix, obtain reaction solution; (3) under olefin polymerization reaction condition, the reaction solution that step (2) obtains is carried out Polymerization reaction to obtain low friction fluid loss reducer; wherein, the total weight of vinyl monomer, water, surfactant and liquid oil phase is 100 parts by weight, vinyl monomer is 5-40 parts by weight, water is 50-80 parts by weight, the surfactant is 0.5-10 parts by weight, and the liquid oil phase is 1-20 parts by weight.

[0041] In the present invention, the lubricating component is added to the polymerization system before the polymerization reaction, and the lubricating componen...

Embodiment 1

[0055] This example is used to illustrate the preparation method of the low friction fluid loss control agent provided by the present invention.

[0056] (1) In a reactor, dissolve 50.0 g of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), 100.0 g of acrylamide (AM) and 100.0 g of p-styrenepropanesulfonic acid (SSS) In 650.0g of water, and adjust the pH with NaOH to obtain a mixed solution with a pH value of 8.0;

[0057] (2) Add 9.0g of Brij35 and 4.0g of Brij52 in the mixed solution obtained in (1), after increasing the stirring speed, gradually add dropwise 10# white oil of 50.0g;

[0058] (3) After controlling the reactor temperature to 40°C, gradually add 2.0 g of sodium sulfite and 2.0 g of sodium persulfate to the solution obtained in (2), and react at a constant temperature for 4 hours to obtain a low-friction fluid loss reducer A- 1.

Embodiment 2

[0064] This example is used to illustrate the preparation method of the low friction fluid loss control agent provided by the present invention.

[0065] (1) In a reactor, dissolve 50.0 g of acrylic acid (AA), 100.0 g of acrylamide (AM) and 80.0 g of p-styrenepropanesulfonic acid (SSS) in 600.0 g of water, and adjust the pH with NaOH , to obtain a mixed solution with a pH value of 9.0;

[0066] (2) Add 5.0 g of sodium lauryl sulfate and 7.0 g of AEO-3 in the mixed solution obtained in (1), after increasing the stirring speed, gradually add dropwise the liquid paraffin of 45.0 g;

[0067](3) After controlling the temperature of the reactor to 45°C, gradually add 1.8 g of sodium sulfite and 1.8 g of sodium persulfate to the solution obtained in (2), and react at a constant temperature for 3 hours to obtain low friction fluid loss reducer A-2 .

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Abstract

The invention discloses a method for preparing a low-friction fluid loss agent. The method comprises the following steps: (1) dissolving vinyl monomers in water and adjusting the pH to obtain a mixed solution with the pH of 8-12; (2) adding a surfactant, a liquid oil phase and an initiator to the mixed solution obtained through the step (1) to obtain a reaction solution; and (3) causing the reaction solution obtained through the step (2) to undergo polymerization reaction under the conditions of olefin polymerization, so that the low-friction fluid loss agent is obtained. The low-friction fluid loss agent obtained through the preparation method can have a lower adhesion coefficient and more obvious filtration reduction effects when applied to horizontal well drilling, and low friction is effectively achieved while the filter loss is reduced.

Description

technical field [0001] The invention relates to a low-friction fluid loss reducer and its preparation method and application. Specifically, it relates to a method for preparing a low-friction fluid loss additive used in horizontal wells during oil drilling, and the low-friction fluid loss additive prepared by the method and the application of the agent in horizontal drilling. Background technique [0002] In recent years, conventional vertical wells have been unable to fully meet the requirements of exploration and development due to their small drainage area and low single-well production. The directional drilling technology is being popularized and applied more and more, especially the horizontal well construction is increasing day by day. However, drilling in the horizontal section poses five major technical problems for the drilling fluid: borehole purification, wellbore stability, friction control, leakage prevention and plugging, and reservoir protection. Among them,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F212/14C08F220/58C08F220/06C09K8/035
Inventor 李财富余伟发高敏侯研博秦冰李本高
Owner CHINA PETROLEUM & CHEM CORP
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