A Drilling Fluid Gelling Agent Synthesized with Pentaerythritol as Branching Agent
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摘要: 针对目前水基钻井液常用的提切剂普遍存在黏度增加幅度大于切力增加幅度的缺点,以季戊四醇为支化剂,硝酸铈铵为引发剂,引发丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸与4-乙烯基-1-(3-磺丙基)吡啶内嗡盐(4-VPPS)共聚,合成出低黏度高切力钻井液用提切剂PAAVP,并考察了合成条件对该聚合物黏度和切力的影响。聚合体系中引入季戊四醇后其表观黏度降低,动塑比提高,优选季戊四醇加量为单体质量的2.5%~3.0%。4-VPPS有利于提高聚合物抗温抗盐性,优选在聚合单体中占比为6%~10%。引发剂加量为单体质量的0.0275%~0.03%。按照推荐配比合成出的聚合物PAAVP的1%水溶液表观黏度为27 mPa·s,动塑比为1.45 Pa/mPa·s。PAAVP溶液在150℃热滚后仍能保持74%的黏度和54%的动塑比值,比常规提切处理剂黄原胶具有更好的抗温性。PAAVP在5% NaCl溶液中能保持91%的黏度和85%的动塑比值,作为钻井液低黏提切剂有较大的应用潜力。Abstract: When using gelling agents to increase the gel strengths of water base drilling fluids, it was found that the increase of gel strengths was generally smaller than the increase of viscosity. A low viscosity high gel strength additive PAAVP has been developed to deal with this problem. PAAVP was prepared by the copolymerization of acrylamide (AM), 2-acrylamide-2-methylpropane sulfonic acid (AMPS) and 4-vinyl-1-(3-sulfopropyl) pyridinium salt (4-VPPS) using pentaerythritol as branching agent and cerium ammonium nitrate as initiator. The effects of copolymerization conditions on the viscosity and gel strengths of PAAVP was studied. Introduction of pentaerythritol into the copolymerization system reduced its apparent viscosity and increased its ratio of yield point to plastic viscosity (YP/PV). The optimum concentration of pentaerythritol was determined to be 2.5%-3.0% (mass) of the monomers for the copolymerization. 4-VPPS is beneficial to the thermal stability and salt resistance of the final product, and its concentration in the copolymerization system was 6%-10% (mass) of the monomers. The concentration of the initiator was 0.0275%-0.03% (mass) of the monomers. 1% water solution of the PAAVP produced in accordance with the recommended mass ratio of reactants had apparent viscosity of 27 mPa·s and YP/PV value of 1.45 Pa/mPa·s. The solution, after hot rolling at 150℃, still had 74% of its original apparent viscosity and 54% of its original YP/PV value, showing better thermal stability than xanthan gum. PAAVP dissolved in 5% NaCl solution had 91% of its original apparent viscosity and 85% of its original YP/PV value, demonstrating potential for future application.
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Key words:
- Drilling fluid additives /
- Gelling agent /
- Pentaerythritol /
- Dendrimer /
- Low viscosity /
- Spatial network structure
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[1] MORTIMER D A.Synthetic polyelectrolytes-a review[J].Polymer International, 1991, 25(1):29-41. [2] LIM S N, KHALIL M, JAN B M, et al.Lightweight biopolymer drilling fluid for underbalanced drilling:An optimization study[J].Journal of Petroleum Science and Engineering, 2015(129):178-188. [3] 张领宇,蒋官澄,安玉秀.钻井液用超分子增黏提切剂-ZJA的研发与评价[J]. 现代化工, 2016, 36(1):131-135.ZHANG Lingyu, JIANG Guancheng, AN Yuxiu. Research and evaluation of supramolecular tackiffer and shear-strength improving agent ZJA for drilling fluids[J]. Modern Chemical Industry, 2016, 36(1):131-135. [4] 田发国, 李建波, 高建林, 等, 钻井液增黏提切剂YF-01的研制[J]. 精细石油化工进展,2009,10(3):4-8.TIAN Faguo, LI Jianbo, GAO Jianlin, et al. Development of tackiffier and shear strength-improving agent yf-01 for drilling fluids[J].Advances in Fine Petrochemicals, 2009, 10(3):4-8. [5] 褚奇, 石秉忠, 李涛, 等, 水基钻井液用低增黏提切剂的合成与性能评价[J]. 钻井液与完井液, 2019, 36(6):689-693.CHU Qi, SHI Bingzhong, LI Tao, et al.Synthesis and evaluation of a low viscosity gelling agent for water base drilling fluids[J].Drilling Fluid & Completion Fluid, 2019, 36(6):689-693. [6] ENGEL S P, RAE P.New methods for sand cleanout in deviated wellbores using small diameter coiled tubing[C]//IADC/SPE Asia Pacific Drilling Technology, Society of Petroleum Engineers, 2002:1-6. [7] MOHAMMADI M, KOUHI M, SARRAFI A, et al. Studying rheological behavior of nanoclay as oil well drilling fluid[J].Research on Chemical Intermediates, 2015, 41(5):2823-2831. [8] KHALIL M, MOHAMED JAN B.Herschel-bulkley rheological parameters of a novel environmentally friendly lightweight biopolymer drilling fluid from xanthan gum and starch[J].Journal of Applied Polymer Science, 2012, 124(1):595-606. [9] BARRY M M, JUNG Y, LEE J K, et al.Fluid filtration and rheological properties of nanoparticle additive and intercalated clay hybrid bentonite drilling fluids[J].Journal of Petroleum Science and Engineering, 2015(127):338-346. [10] 刘双, 张洪, 邱晓惠, 等.黄原胶及其衍生物的耐温耐剪切性能[J].钻井液与完井液, 2008, 35(1) 119-123.LIU Shuang, ZHANG Hong, QIU Xiaohui, et al. Temperature resistance and shear resistance of xanthan gum and its derivatives[J].Drilling Fluid & Completion Fluid, 2008, 35(1):119-123. [11] 唐新德, 张其霞, 周其凤. 季戊四醇及其衍生物在树枝状大分子合成中的应用[J]. 有机化学, 2004, 24(6):585-590.TANG Xinde, ZHANG Qixia, ZHOU Qifeng. Application of pentaerythritol and its derivatives in the synthesis of dendrimers[J].Chinese Journal of Organic Chemistry, 2004, 24(6):585-590. [12] 魏伟, 张艳, 魏杰. 以季戊四醇为核的超支化树脂的研究[J]. 涂料工业, 2008, 38(6):19-22.WEI Wei, ZHANG Yan, WEI Jie.Synthesis and characterization of pentaery thrirol-based hyperbranched polyester[J].Paint & Coatings Industry, 2008, 38(6):19-22. [13] 丛珊, 张宏伟.以季戊四醇为核分子的支化CPAM的制备及其增强效果[J].中国造纸, 2013, 32(1):30-34.CONG Shan, ZHANG Hongwei.Preparation of branched cationic polyacrylamide with PETL as nuclear and its application as paper strengthening agent[J].China Pulp & Paper, 2013, 32(1):30-34. [14] BAHNG, JOONG HWAN, YEOM.et al.Anomalous dispersions of' hedgehog' particles[J].Nature, 2015(517):596-599. [15] 寇玉霞, 童身毅, 刘新泰, 等. 以季戊四醇为" 核分子" 超支化聚酯-酰胺的合成及表征[J]. 功能高分子学报, 2005, 18(2):305-309.KOU Yuxia, TONG Shenyi, LIU Xintai, et al. Synthesis and characterization of hyperbranched poly(ester amide)with pentaerythritol as a core molecule[J].Journal of Functional Polymers, 2005, 18(2):305-309. [16] 尚小琴, 梁红, 郑成, 等.Ce4+引发体系对淀粉接枝共聚反应的影响研究[J]. 化学世界, 2001, 42(5):245-247.SHANG Xiaoqin, LIANG Hong, ZHENG Cheng, et al. Study on the graft copolymerization of starch with Ce4+ as initiator[J].Chemical World, 2001, 42(5):245-247. [17] ATHAWALE V D, LELE V.Graft copolymerization of acrylamide onto starch initiated by ceric ammonium nitrate[J].Starch/Starke, 1998, 50(10):426-431.
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