Study and Application of a New Poly Carboxylic Acids Drag Reducer
-
摘要: 针对伊拉克地区夏季环境温度高导致现场配制的水泥浆触变性强,可泵性差,现有减阻剂难以使水泥浆保持良好分散能力,严重影响固井施工安全的问题。以聚乙二醇二丙烯酸酯、甲基丙烯酸、2-丙烯酰胺-2-甲基丙磺酸和芳香磺酸类单体等为原料,合成了一种新型聚羧酸油井水泥减阻剂BH-D301L。采用正交实验得到了最佳合成原料物质的量比为1∶4∶1∶1,反应温度为80℃,反应时间为2 h,引发剂加量为0.4%。通过红外光谱分析和渗透凝胶色谱表征证明了合成产物为共聚物,参考API RP 10B标准评价了加入减阻剂的不同水泥浆体系的综合性能。实验结果表明,加量分别为0.5%和1.0%的减阻剂对常规密度的自来水和饱和盐水配浆水泥浆体系的流变性能有明显改善,体系抗压强度和稠化时间符合行业标准要求。在模拟环境温度45~65℃下,加有1.0%减阻剂的高密度含盐水泥浆的流性指数大于0.7,稠度系数小于0.58Pa · sn,体系触变性增强现象减弱,静切力差小于3 Pa,24 h抗压强度超过14 MPa,水泥浆体系稠化、沉降稳定性均能满足固井施工要求,并在现场得到了很好的应用。Abstract: Cement slurry mixed in Iraq has strong thixotropy and poor pumpability in summer, and the drag reducers presently in use are unable to render the cement slurries good dispersibility. These problems have seriously affected the safe performance of well cementing. To address these problems, a new poly carboxylic acids drag reducer, BH-D301L, has been developed with monomers such as polyethylene glycol diacrylate, methacrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and aromatic sulphonic acid etc. Using orthogonal experiment, the optimum conditions for the reaction was determined to be as follows:molar ratio of the monomers of 1:4:1:1, reaction temperature of 80℃, reaction time of 2 h, and initiator concentration of 0.4%. The reaction product was characterized by IR spectroscopy and gel permeation chromatography, and was tested for its general performance in different cement slurries in accordance with API RP 10B. Experimental results showed that by adding 0.5% and 1.0% of the drag reducer into a cement slurry formulated with fresh water and a cement slurry formulated with saturated saltwater, the rheology of the cement slurries were obviously improved. The compressive strengths and thickening time of the cement slurries satisfied the requirements of industrial standards. At simulated temperatures of 45-65℃, a high-density salt-containing cement slurry treated with 1.0% drag reducer had flow index of greater than 0.7 and consistency factor of less than 0.58 Pa·sn. The thixotropy of the cement slurry treated with the new drag reducer had thixotropy increased less obviously. Gel strength of the cement slurry was less than 3 Pa and 24 h compressive strength exceeded 14 MPa. The cement slurry treated with the drag reducer had thickening property and settling stability all satisfied the needs of well cementing job, and was successfully used in field operations.
-
[1] 许前富,罗宇维,冯克满,等. 一种高密度盐膏层固井水泥浆的研究及应用[J]. 钻井液与完井液,2014, 31(1):68-72.XU Qianfu,LUO Yuwei,FENG Keman,et al. Research and application of high density cement slurry on salt/gypsum formation[J].Drilling Fluid & Completion Fluid,2014,31(1):68-71. [2] 刘崇建,黄柏宗,徐同台,等. 油气井注水泥理论与应用[M]. 北京:石油工业出版社,2000:213-214. LIU Chongjian, HUANG Baizong, XU Tongtai, et al. Theory and application of cementing in oil and gas wells[M].BeiJing:Petroleum Industry Press,2000:213-214. [3] 王中华,范青玉,陈良德. 磺化丙酮-甲醛缩聚物的合成及用于固井水泥浆分散剂的研究[J]. 油田化学, 1990,7(2):129-133.WANG Zhonghua,FAN Qingyu,CHEN Liangde. Synthesis and performace of sulphonated acetoneformaldehyde polycondensates as dispersant for cement slurries[J].Oilfield Chemistry,1990,7(2):129-133. [4] 王绍先,彭志刚,印兴耀. 新型油井水泥分散剂AS的研制及其应用[J]. 济南大学学报(自然科学版), 2008,22(4):334-337. WANG Shaoxian,PENG Zhigang,YIN Xingyao. Synthesis of a novel dispersant(AS) and its application in oil-well cementing[J]. Journal of University of Ji Nan (Sci. & Tech.),2008,22(4):334-337. [5] 辛海鹏,曾建国,邹建龙,等. 梳型聚羧酸减阻剂的室内研究[J]. 钻井液与完井液,2017,34(3):72-76.XIN Haipeng, ZENG Jianguo, ZOU Jianlong, et al. Laboratory study on comb-like polycarboxylic acid friction reducer[J]. Drilling Fluid & Completion Fluid, 2017,34(3):72-76. [6] 黄召, 何福耀, 雷磊, 等. 新型高效抗磨减阻剂在东海油气田的应用[J]. 钻井液与完井液, 2017, 34(4):49-54.HUANG Zhao, HE Fuyao, LEI Lei, et al.Application of a new highly efficient anti-wear friction reducer in donghai oil and gas field[J]. Drilling Fluid & Completion Fluid, 2017, 34(4):49-54. [7] 李斌, 蒋官澄, 贺垠博. 一种抗高温抗钙两性离子聚合物分散剂[J]. 钻井液与完井液, 2019, 36(3):303-307.LI Bin, JIANG Guancheng, HE Yinbo.A high temperature calcium resistant amphoteric polymer dispersant[J].Drilling Fluid & Completion Fluid, 2019, 36(3):303-307. [8] 张浩,符军放,冯克满,等. 新型油井水泥分散剂PCF42L的研制与应用[J]. 钻井液与完井液,2012,29(4):55-58.ZHANG Hao,FU Junfang,FENG Keman,et al. Research and application on novel oil well cement dispersing agent PC-F42L[J]. Drilling Fluid & Completion Fluid,2012,29(4):55-58. [9] 温虹,王伟山,郑柏存.AMPS/NNDMA共聚物和聚羧酸系分散剂在油井水泥中的性能研究[J]. 混凝土与水泥制品,2016,240(4):17-20.WEN Hong,WANG Weishan,ZHENG Baicun, Research on properties of AMPS/NNDMA copolymer and PCE dispersant in oil well cement[J]. Concrete and Cement Products,2016,240(4):17-20. [10] 田宝振,覃毅,高飞,等. ZG112深井低密度高强度韧性水泥浆固井技术[J]. 石油钻采工艺,2019,41(3):288-293.TIAN Baozhen, QIN Yi, GAO Fei, et al. The cementing technology of low-density, high-strength tough cement slurry for the deep well ZG112[J]. Oil Drilling & Production Technology, 2019, 41(3):288-293. [11] KINOSHITA M,OKADA K. Method of producing polyether ester monomer and cement dispersants:EUR, EP1090901B1[P].20090930. [12] OMID AKHLAGHI, OZGE AKBULUT, YUSUF Z MENCELOGLU. Extensional rheology and stability behavior of alumina suspensions in the presence of AMPSmodified polycarboxylate ether-based copolymers[J]. Colloid & Polymer Science,2015,293:2867-2876. [13] 李崇智,冯乃谦,李永德. 聚羧酸类高性能减水剂的研究进展[J]. 化学建材,2001(6):38-41. LI Chongzhi,FENG Naiqian,LI Yongde. Research development of polycarboxylate type superplasticizers[J]. Chemical Materials for Construction,2001(6):38-41. [14] HONGWEI TIAN, XIANGMING KONG, TONG SU, et al. Comparative study of two PCE superplasticizers with varied charge density in Portland cement and sulfoaluminate cement systems[J]. Cement and Concrete Research,2019(115):43-58.
点击查看大图
计量
- 文章访问数: 558
- HTML全文浏览量: 157
- PDF下载量: 301
- 被引次数: 0