Amide polymer shale inhibitor for drilling fluid and preparation method of shale inhibitor

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

Active Publication Date: 2017-01-04
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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  • Amide polymer shale inhibitor for drilling fluid and preparation method of shale inhibitor
  • Amide polymer shale inhibitor for drilling fluid and preparation method of shale inhibitor
  • Amide polymer shale inhibitor for drilling fluid and preparation method of shale inhibitor

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Effect test

Embodiment 1

[0020] According to the quality and 100% preparation: acrylamide 10%, 300# liquid wax 5%, cetyl dimethyl benzyl ammonium chloride 10%, dimethyl diallyl ammonium chloride 2%, methacrylic Acyloxyethyltrimethylammonium chloride 30%, acrylic acid 25%, emulsifier 5%, initiator 0.6%, water 40%; among them, the emulsifier is Span60 and Tween80 according to the composition of 1:1, and the initiator is persulfuric acid Ammonium-ethanol; in the reaction kettle, first add the formulated amount of water, add the formulated amount of oil phase dispersion medium 300# liquid wax and emulsifier, and stir at 45°C for 1 hour; add the formulated amount of acrylamide, acrylic acid, Hexadecyl dimethyl benzyl ammonium chloride, dimethyl diallyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride; then add the initiator of the formula amount, and the temperature rises to 80 ℃℃, stir at a constant speed, the rotation speed is about 150r / min, and react for 6h to prepare the shale inhib...

Embodiment 2

[0022] According to the quality and 100% of raw materials: acrylamide 20%, 300# liquid wax 10%, cetyl dimethyl benzyl ammonium chloride 20%, dimethyl diallyl ammonium chloride 8%, methacrylic Acyloxyethyltrimethylammonium chloride 20%, acrylic acid 15%, emulsifier 2%, initiator 0.03%, water 20%; wherein, the emulsifier is Span80 and Tween60 according to the composition of 1:1.5, and the initiator is persulfuric acid Ammonium-pentaerythritol; in the reaction kettle, first add the formulated amount of water, add the formulated amount of oil phase dispersion medium 300# liquid wax and emulsifier, and stir at 60°C for 2 hours; add the formulated amount of acrylamide, acrylic acid, ten Hexaalkyl dimethyl benzyl ammonium chloride, dimethyl diallyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride; then add the amount of initiator formulated, and the temperature rises to 90°C , stirred at a constant speed, the rotation speed was about 200r / min, and reacted for 8 hou...

Embodiment 3

[0024] According to the quality and 100% raw materials: acrylamide 15%, 300# liquid wax 8%, cetyl dimethyl benzyl ammonium chloride 15%, dimethyl diallyl ammonium chloride 5%, methacrylic Acyloxyethyltrimethylammonium chloride 25%, acrylic acid 20%, emulsifier 3%, initiator 0.1%, water 30%; wherein, emulsifier is Span60 and cetyltrimethylammonium bromide according to 1.5 : 1 composition, the initiator is ammonium persulfate-sodium bisulfite; in the reaction kettle, first add the water of formula quantity, add the oil phase dispersion medium 300# liquid wax and emulsifier of formula quantity, and stir at 50 ℃ 1h; add acrylamide, acrylic acid, hexadecyl dimethyl benzyl ammonium chloride, dimethyl diallyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride; Add the formulated amount of initiator, raise the temperature to 90°C, stir at a constant speed at about 300r / min, and react for 7 hours to prepare the 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 wellbore instability in shale formations has been perplexing the vast number of petroleum engineering technicians. Well collapse and borehole shrinkage caused by well wall instability will not only lead to downhole complications such as tripping resistance, drill sticking, increased torque, pump holding, etc. Well scrapping. [0003] As the state has intensified its exploration and development of shale gas resources in recent years, the wellbore stability is facing more severe challenges. Although currently oil-based drilling fluids are usually used in shale gas drilling to alleviate wellbore instability, from the perspective of economic development benefits and environmental protection, ...

Claims

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Application Information

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Patent Type & Authority Applications(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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