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| 聚环氧琥珀酸对油田污水中硫酸锶/钡垢的阻垢性能及阻垢机制研究 |
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姜翠玉1,苏明瑾2,梁书源1,夏洋峰1,宋林花1,张龙力1,邹剑3,王秋霞3
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(1.中国石油大学理学院,山东青岛 266580;2.中国石油大学化学工程学院,山东青岛 266580;3.中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459)
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| 摘要: |
| 以自制聚环氧琥珀酸(PESA)为研究对象,考察其相对分子质量对油田污水中硫酸锶/钡垢的阻垢性能,并将PESA与常用阻垢剂进行性能比较。结果表明:PESA相对分子质量对其阻垢性能有明显的影响,对于不同浓度的成垢离子、不同种类的垢,要选择不同的相对分子质量和合适的用量;PESA是一种高效的阻硫酸锶/钡垢的阻垢剂,针对含500 mg/L以下锶离子的污水相对分子质量500～1000较好,针对含1 000 mg/L以上锶离子的污水相对分子质量约2000较好,用量3～8 mg/L时阻垢率均可超过95％;对于阻硫酸钡垢,其阻垢性能优于油田常用阻垢剂,且PESA与PAA有复配效应,对于含1 000 mg/L Ba2+的水系,PESA与PAA在比例为1∶3,用量为100 mg/L时,阻垢率比单独使用提高近20％;PESA主要是通过引起晶格畸变、扰乱晶体正常生长以及螯合增溶等机制起到阻垢作用。 |
| 关键词: 聚环氧琥珀酸 阻垢性能 相对分子质量 硫酸钡/硫酸锶 阻垢机制 油田污水 |
| DOI：10.3969/j.issn.1673-5005.2017.01.023 |
| 分类号::TE 992 |
| 文献标识码:A |
| 基金项目:国家油气重大专项(2016ZX05058-003-006) |
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| Research on mechanism and scale inhibition performance of PESA on SrSO4/BaSO4 in oilfield sewage |
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JIANG Cuiyu1, SU Mingjin 2, LIANG Shuyuan1, XIA Yangfeng1, SONG Linhua1, ZHANG Longli1, ZOU Jian3, WANG Qiuxia3
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(1.College of Science in China University of Petroleum, Qingdao 266580, China;2.College of Chemical Engineering in China University of Petroleum, Qingdao 266580, China;3.Bohai Petroleum Research Institute, CNOOC Tianjin Company, Tianjin 300459, China)
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| Abstract: |
| The self-made polyepoxysuccinic acids (PESA) were prepared and the scale inhibition effect of the relative molecular weight on barium sulfate and strontium sulfate in the oilfield sewage were investigated. And the scale inhibition performance between PESA and traditional scale inhibitor was compared. The results show that the molecular weight of PESA has an obvious influence on the scale inhibition. PESA with different molecular weights and different concentrations are selected in terms of different concentrations of scale-forming ions and different kinds of scales. It is also found that PESA is an efficient scale inhibitor for strontium/barium sulfate. The relative molecular weight of 500-1000 and 2000 is feasible to oilfield sewage containing 500 mg/L and 1 000 mg/L Sr2+ respectively. The scale inhibition rate can be up to 95％ with 3-8 mg/L PESA. The scale inhibition performance of PESA is better than that of the traditional scale inhibitor for the oilfield. Moreover, the synergistic effect of PESA and PAA is found. Compared with the results obtained by PESA, the scale inhibition rate is improved for 20％, when PESA and PAA are at a ratio of 1∶3, and the total concentrationis 100 mg/L. The PESA inhibition mechanisms mainly are lattice distortion, charge dispersion and chelating solubilization. |
| Key words: polyepoxysuccinic acid scale inhibition relative molecular weight barium sulfate/strontium sulfate scale inhibition mechanism oilfield sewage |
