Inverse emulsion drag reduction agent for fracturing shale gas by using quick water and preparation method thereof

A technology of inverse emulsion and drag reducer, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of low solid content of drag reducer, unfavorable industrial production, complicated production process, etc., and simplify the production process , Improve structural stability and resistance reduction performance, and reduce production costs

Active Publication Date: 2014-06-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The publication number is CN102977877A, and the Chinese patent literature published on March 20, 2013 discloses a drag-reducing oil for shale gas fracturing made from acrylamide, sodium acrylate and sodium 2-acrylamide-2 methylpropanesulfonate. agent and its preparation method, the method needs to first prepare a stabilizer by aqueous solution polymerization, and then prepare a drag reducer by dispersion polymerization, and at the same time, the preparation process needs to pass nitrogen gas to remove oxygen and the preparation time is long (the total reaction time is more than 20h), the production process It is complicated and not conducive to industrial production. At the same time, the solid content of the drag reducing agent is low, and the dosage is relatively large when used

Method used

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  • Inverse emulsion drag reduction agent for fracturing shale gas by using quick water and preparation method thereof
  • Inverse emulsion drag reduction agent for fracturing shale gas by using quick water and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1 (produced by 400kg)

[0038] Add 121.7kg of clear water to the reactor, add 30kg of anionic monomer acrylic acid, add 16.7kg of sodium hydroxide and a sodium hydroxide solution prepared with 25kg of clear water, adjust the pH value to about 6.5, and add 98.5kg of nonionic monomer microbial method propylene Amide, 0.3kg initiator azobisisobutylamidine hydrochloride and 1kg cosolvent sodium bicarbonate are stirred until fully dissolved to obtain an aqueous phase solution; 9kg sorbitan monooleic acid is added in 15# white oil of 90kg ester and 1kg sorbitan trioleate and 1.5kg of oil-soluble monomer lauryl methacrylate, stir evenly to obtain an oil phase; add the above-mentioned aqueous phase solution dropwise to the oil phase under continuous stirring, and add dropwise After the completion of high-speed emulsification for 30 minutes to obtain a stable inverse emulsion system; dissolve 0.3 kg of sodium bisulfite with 5 kg of clear water, and add the aqueous s...

Embodiment 2

[0039] Embodiment 2 (produced by 400kg)

[0040]Add 121.6kg of clear water to the reaction kettle, add 32kg of anionic monomer acrylic acid, add 17.8kg of sodium hydroxide and 25kg of clear water to prepare the sodium hydroxide solution, adjust the pH value to about 6.5, add 96kg of non-ionic monomer microbial method acrylamide , 0.15kg initiator azobisisobutylamidine hydrochloride and 1kg cosolvent sodium bicarbonate, stir until fully dissolved to obtain an aqueous phase solution; add 9kg sorbitan monooleate in 15# white oil of 90kg and 1kg of sorbitan trioleate and 2kg of oil-soluble monomer lauryl methacrylate, stir to obtain an oil phase; the above-mentioned aqueous phase solution is added dropwise to the oil phase under continuous stirring, and after the addition is completed, High-speed emulsification for 30 minutes to obtain a stable inverse emulsion system; dissolve 0.45 kg of sodium bisulfite in 5 kg of clear water, and add the aqueous solution of sodium bisulfite d...

Embodiment 3

[0041] Embodiment 3 (produced by 400kg)

[0042] Add 116.6kg of clear water to the reaction kettle, add 35kg of anionic monomer acrylic acid, add 19.5kg of sodium hydroxide and 25kg of clear water to prepare the sodium hydroxide solution, adjust the pH value to about 6.5, add 95kg of non-ionic monomer microbial method acrylamide , 0.3kg initiator azobisisobutylamidine hydrochloride and 1kg cosolvent sodium bicarbonate, stir until fully dissolved to obtain an aqueous phase solution; add 8.5kg sorbitan monooleic acid in 15# white oil of 90kg ester and 1.5kg sorbitan trioleate and 2kg of oil-soluble monomer lauryl methacrylate, stir evenly to obtain an oil phase; add the above-mentioned aqueous phase solution dropwise to the oil phase under continuous stirring, and add dropwise After the completion of high-speed emulsification for 30 minutes to obtain a stable inverse emulsion system; dissolve 0.6 kg of sodium bisulfite with 5 kg of clear water, and add the aqueous solution of ...

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Abstract

The invention discloses an inverse emulsion drag reduction agent for fracturing a shale gas by using quick water and a preparation method thereof, and relates to the technical field of petroleum engineering. The inverse emulsion drag reduction agent is a macromolecular water soluble polymer which is prepared from acrylamide, sodium acrylate and dodecyl methacrylate copolymerized in an inverse emulsion, and azo diisobutyl hydrochloride and sodium hydrogen sulfite as complex initiation systems. A long-chain hydrophobic monomer is introduced into the drag reduction agent, so that the shear resistance of the drag reduction agent in a high displacement pump injection process is improved, meanwhile, the drag reduction agent is prepared from the inverse emulsion in a polymerization manner, the product is a liquor and instant, the liquor demands of a continuous mixed construction technology for fracturing the shale gas are met, the dosage for field use is 0.06-0.8% of mass of clean water, and the drag reduction rate can be up to 73%.

Description

[0001] technical field [0002] The invention relates to the technical field of petroleum engineering, in particular to an inverse emulsion drag reducer for shale gas slick water fracturing and a preparation method thereof. Background technique [0003] As an unconventional oil and gas resource, the shale gas reservoir stimulation process is very different from that of conventional oil and gas resources. In order to communicate or open the fracture system in the reservoir to the greatest extent, the stimulation of shale gas reservoirs adopts large liquid volume and large displacement fracturing technology. To meet the needs of shale gas stimulation and reconstruction, reduce the energy loss caused by the turbulent flow of the fracturing fluid during the pumping process due to the influence of high pump injection pressure, increase the pump injection displacement and the liquid injection volume under the same pump injection displacement Particularly important. [0004] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/602C09K8/665C09K8/68C09K8/882
Inventor 李嘉
Owner BC P INC CHINA NAT PETROLEUM CORP
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