多功能滑溜水减阻剂的制备及性能评价
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陕西省重点实验室建设课题“陕西省陆相页岩气成藏与开发重点实验减阻剂研究”(项目编号2016SZS-06)


Preparation and Performance Evaluation of a Multi-functional Drag Reducing Agent Used in Slick Water Fracturing Fluid
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    摘要:

    为获得滑溜水压裂液优良的减阻性,以柴油为分散介质、失水山梨醇单油酸酯和聚氧化乙烯失水山梨醇单硬脂酸酯为复配乳化剂、过硫酸钾和偶氮二异丁腈为引发剂,以丙烯酰胺(AM)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)和α-十二烯(EA)为反应单体,采用反相乳液聚合的方法制备了滑溜水减阻剂 DGSA-1。用红外光谱仪对合成产物的结构进行了表征。通过测定减阻剂水溶液的特性黏数,对减阻剂制备条件进行了优选,研究了减阻剂的抗盐性、表面活性和减阻性。结果表明,在 AM、AMPS、EA 3种物质摩尔比为 1.1∶1∶0.1、引发剂用量占单体总质量的 0.048%、复配乳化剂的HLB值(表面活性剂的亲水亲油平衡值)为 5.5、反应温度 55℃、反应时间 6 h的条件下制备的滑溜水减阻剂 DGSA-1的减阻效果最佳。DGSA-1减阻剂具有分散溶解性好、抗盐、高效减阻和低表界面张力的特性。0.15% DGSA-1水溶液的黏度在 2 min内达到最大,减阻率为 73.2%,减阻性能优于国内外同类产品。图 3表 2参 16

    Abstract:

    In order to obtain excellent drag reduction agent of slick water fracturing fluid(DGSA-1),DGSA-1 was prepared by inverse emulsion polymerization, using diesel as dispersion medium, sorbitan monooleate and polyoxyethylene sorbitan monostearate as complex emulsifiers,potassium persulfate and azobisisobutyronitrile as initiators,and acrylamide (AM),2-acrylamide-2-methylpropanesulfonic acid(AMPS)and α-dodecene(EA)as reaction monomers. The structure of synthesized product was characterized by infrared spectrometer. By determining the intrinsic viscosity of the drag reducing agent aqueous solution,the preparation condition of the drag reducing agent was optimized. And the salt resistance,surface activity and drag reduction of the drag reducing agent were studied. The results showed that DGSA-1 had the best drag reduction effect which prepared on the reaction condition of 1.1∶1∶0.1 molar ratio of AM,AMPS and EA,0.048% the amount of initiator in the total mass of the monomer,5.5 HLB value,55℃ reaction temperature,6 h reaction time. DGSA-1 had the characteristics of good dispersibility,salt resistance,high efficiency drag reduction and low surface interfacial tension. The viscosity of 0.15% DGSA-1 aqueous solution reached the maximum within 2 min,and the drag reduction rate was 73.2%. The drag reduction performance of DGSA-1 was better than that of similar products at home and abroad.

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  • 在线发布日期: 2019-05-10
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