A kind of amide polymer shale inhibitor for drilling fluid and preparation method thereof

A technology of shale inhibitor and liquid amide, which is applied in the direction of drilling composition, chemical instruments and methods, etc., and can solve problems such as poor inhibition effect

Active Publication Date: 2018-10-12
成都西油华巍科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an amide polymer shale inhibitor for drilling fluid and a preparation method thereof, which solves the above-mentioned deficiencies in the prior art, and achieves excellent inhibition through the synergistic effect of chemical inhibition and hydrophobic group coating blocking. effect, achieve overall suppression, and solve the problem of poor suppression effect of previous shale inhibitors in complex situations

Method used

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  • A kind of amide polymer shale inhibitor for drilling fluid and preparation method thereof
  • A kind of amide polymer shale inhibitor for drilling fluid and preparation method thereof
  • A kind of amide polymer shale inhibitor for drilling fluid and preparation method thereof

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Effect test

Embodiment 1

[0020] Prepare materials according to quality and 100%: acrylamide 10%, 300# liquid wax 5%, cetyl dimethyl benzyl ammonium chloride 10%, dimethyl diallyl ammonium chloride 2%, methacrylic acid Acyloxyethyl trimethyl ammonium chloride 30%, acrylic acid 25%, emulsifier 5%, initiator 0.6%, water 40%; among them, the emulsifier is Span60 and Tween80 in a 1:1 composition, and the initiator is persulfuric acid Ammonium-ethanol; In the reactor, first add the formula amount of water, add the formula amount of the oil phase dispersion medium 300# liquid wax and emulsifier, and stir at 45 ℃ for 1h; add the formula amount of acrylamide, acrylic acid, Cetyl dimethyl benzyl ammonium chloride, dimethyl diallyl ammonium chloride, methacryloxyethyl trimethyl ammonium chloride; then add a formula amount of initiator, the temperature rises to 80 ℃ ℃, uniform stirring, speed of about 150r / min, reaction for 6h, to prepare shale inhibitor JXA-1.

Embodiment 2

[0022] Prepare materials according to quality and 100%: acrylamide 20%, 300# liquid wax 10%, cetyl dimethyl benzyl ammonium chloride 20%, dimethyl diallyl ammonium chloride 8%, methyl propylene Acyloxyethyl trimethyl ammonium chloride 20%, acrylic acid 15%, emulsifier 2%, initiator 0.03%, water 20%; among them, the emulsifier is Span80 and Tween60 according to 1:1.5, and the initiator is persulfuric acid Ammonium-pentaerythritol; in the reactor, first add the formula amount of water, add the formula amount of the oil phase dispersion medium 300# liquid wax and emulsifier, and stir at 60 ℃ for 2h; add the formula amount of acrylamide, acrylic acid, ten Hexaalkyl dimethyl benzyl ammonium chloride, dimethyl diallyl ammonium chloride, methacryloxyethyl trimethyl ammonium chloride; then add a formula amount of initiator, the temperature rises to 90 ℃ , Stirring at a uniform speed, rotating speed of about 200r / min, reacting for 8 hours, and preparing shale inhibitor JXA-1.

Embodiment 3

[0024] Prepare materials according to quality and 100%: acrylamide 15%, 300# liquid wax 8%, cetyl dimethyl benzyl ammonium chloride 15%, dimethyl diallyl ammonium chloride 5%, methyl propylene Acyloxyethyl trimethyl ammonium chloride 25%, acrylic acid 20%, emulsifier 3%, initiator 0.1%, water 30%; among them, the emulsifier is Span60 and cetyltrimethylammonium bromide according to 1.5 :1 composition, the initiator is ammonium persulfate-sodium bisulfite; in the reactor, first add the formula amount of water, add the formula amount of the oil phase dispersion medium 300# liquid wax and emulsifier, and stir at 50 ℃ 1h; add formula amount of acrylamide, acrylic acid, cetyl dimethyl benzyl ammonium chloride, dimethyl diallyl ammonium chloride, methacryloxyethyl trimethyl ammonium chloride; then Add a formula amount of initiator, raise the temperature to 90°C, stir at a constant speed, rotate at about 300r / min, and react for 7 hours to prepare shale inhibitor JXA-1.

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Abstract

The invention provides an amide polymer shale inhibitor for drilling fluid. The amide polymer shale inhibitor is characterized by being prepared from, by mass, 10%-20% of acrylamide, 5%-10% of 300# liquid wax, 10%-20% of hexadecyl dimethyl benzyl ammonium chloride, 2%-8% of dimethyl diallyl ammonium chloride, 20%-30% of methacryloyloxyethyl trimethyl ammonium chloride, 15%-25% of acrylic acid, 2%-5% of emulsifiers, 0.03%-0.6% of an initiator and 20%-40% of water, wherein the emulsifiers are any two of Span60, Tween80, Span80, Tween60 and hexadecyl trimethyl ammonium bromide, and the initiator is any one of ammonium persulfate-ethanol, ammonium persulfate-pentaerythritol, ammonium persulfate-sodium hydrogen sulfite and ammonium persulfate-sodium sulfite. By means of a synergistic effect of chemical inhibiting and enveloping and blocking of hydrophobic groups, the good inhibition effects can be achieved, integral inhibition is achieved, and the problem that an original shale inhibitor is bad in inhibition effect under the complex condition is solved.

Description

Technical field [0001] The invention relates to the field of oil and gas well exploitation, in particular to an amide polymer shale inhibitor for drilling fluid and a preparation method thereof. Background technique [0002] In the process of oil and gas drilling, the worldwide problem of borehole instability in shale formations has been plagued by many petroleum engineering and technical personnel. The well collapse and diameter reduction caused by the instability of the borehole wall will not only cause obstacles in tripping, stuck drilling, increased torque, and pump hold-up, but also cause the drilling tool to fall, the wellbore trajectory deflection or the whole hole Scrap of the well. [0003] As the country has increased its efforts in the exploration and development of shale gas resources in recent years, the issue of wellbore stability is facing more severe challenges. Although shale gas drilling usually uses oil-based drilling fluids to alleviate the instability of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/34C08F220/06C08F220/56C08F226/02C08F2/30C08F2/28C09K8/035
CPCC08F2/28C08F2/30C08F220/34C08F220/56C09K8/035C08F220/06C08F226/02
Inventor 宋芳徐兴华麻洪霞
Owner 成都西油华巍科技有限公司
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