钻井液用抗高温聚合物增黏剂的制备与性能评价
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国家科技重大专项“大型油气田及煤层气开发”子课题“深井超深井优质钻井液及固井完井技术研究”(项目编号 2016ZX05020-004),天津市科技计划项目“非常规和深层油气资源开发钻井液关键技术研究”(项目编号19PTSYJC00120)


Preparation and Performance Evaluation of Polymeric Viscosifier with Thermal Resistance for Water-based Drilling Fluid
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    摘要:

    针对当前钻井液增黏剂耐温抗盐性能较差,无法满足深部高温储层钻探要求的问题,以2-甲基-2-丙烯酰胺基丙磺酸(AMPS)、丙烯酰胺(AM)、N-乙烯基吡咯烷酮(NVP)和N,N-二甲基丙烯酰胺(DMAM)为单体,利用自由基共聚法制备了耐温抗盐聚合物增黏剂ANAD。采用正交实验法优化ANAD的合成条件,采用红外光谱仪、核磁共振波谱仪等表征ANAD的分子结构,采用热重分析仪测定ANAD分子链的热稳定性,评价了ANAD在基浆中的耐温抗盐性能,分析了ANAD的增黏机理。结果表明,在引发剂2,2'-偶氮二异丁基脒二盐酸盐(AIBI)加 量0.5%、单体摩尔比n(AMPS)∶n(NVP)∶n(AM)∶n(DMAM)=37.70∶31.10∶31.10∶0.10、反应温度55℃的条件下制备的ANAD抗温性能优良,分子链初始分解温度为328℃,在淡水基浆和15%盐水基浆中的抗温能力分别为230℃和180℃。ANAD的抗剪切性能良好。ANAD具有大分子侧链、刚性基团及极性基团磺酸基团,其抗温、抗 盐、增黏和抗剪切性能均优于国内常用增黏剂80A51.

    Abstract:

    As the current temperature-salt resistance of the viscosifier of drilling mud system failed to meet the requirements of drilling operation,polymeric viscosifier ANAD was synthesized by using 2-methyl-2 acrylamidopropanesulfonicacid(AMPS),acrylamide (AM),N-vinylpyrrolidone (NVP),N,N-dimethyl acrylamide (DMAM) as monomer through free radical copolymerization technique. The orthogonal experiment design was used to optimize the reaction conditions. The chemical structure of the viscosifier ANAD was elucidated by Fourier transform infrared(FTIR)spectroscopy and nuclear magnetic resonancespectroscopy(1H-NMR),etc. The thermal stability of ANAD was assessed by thermogravimetric analysis. Finally the rheological properties of ANAD-modified water based drilling mud were evaluated,and the viscosity-increasing mechanism of ANAD was analyzed. The results showed that the optimum preparation condition of ANAD was obtained as follows:0.5% dosage of the initiator 2,2'-azobis isobutyl amidine dihydrochloride(AIBI),37.70∶31.10∶31.10∶0.10 monomer molar ratio of AMPS∶NVP∶AM∶DMAM,55℃ reaction temperature. ANAD had excellent temperature resistance. The initial decomposition temperature of ANAD molecular was up to 328℃. ANAD-modified water based drilling mud proved satisfactory resistance to thermal aging up to 230℃ or 180℃ when freed of electrolytes contamination or exposed to 15% brine. ANAD had macromolecular side chains,rigid groups and polar group sulfonic acid groups,which was superior to domestic commonly used tackifiers 80A51 in temperature resistance,salt resistance,viscosity increasing and shear resistance.

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张现斌,李 欣,陈安亮,陈蕾旭,陈程斌,何 鹏,付明顺,谢彬强.钻井液用抗高温聚合物增黏剂的制备与性能评价[J].油田化学,2020,37(1):1-6.
ZHANG Xianbin, LI Xin, CHEN Anliang, CHEN Leixu, CHEN Chengbin, HE Peng, FU Mingshun, XIE Binqiang. Preparation and Performance Evaluation of Polymeric Viscosifier with Thermal Resistance for Water-based Drilling Fluid[J]. OILFIELD CHEMISTRY,2020,37(1):1-6.

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  • 在线发布日期: 2020-04-27
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