三元复合驱频繁卡泵井垢质分析及防垢机理研究

发布时间：2018-03-28 19:01

  本文选题：三元复合驱频繁卡泵井　切入点：防垢机理　出处：《东北石油大学》2017年硕士论文

【摘要】：三元机采井进入结垢高峰期,化学防垢效果变差,检泵周期平均在200天左右,频繁卡泵是结垢高峰期检泵周期短主要原因,频繁卡泵井的垢卡平均检泵周期小于60天。现场采集的垢质分析结果表明,频繁卡泵井的垢质以硅酸盐垢为主,垢质中硅酸盐垢含量达到60%以上。本文分析了三元复合驱频繁卡泵井卡泵的原因,发现频繁卡泵井垢样大部分含有硬质方解石,而普通结垢井中垢样中大部分为无定形碳酸钙、松散质晶格畸变方解石、球霞石或水合碳酸钙,碳酸钙被无定形二氧化硅包裹。硬质方解石莫氏硬度为3-3.5级,远大于无定形碳酸钙的硬度(0),因此,垢样中有硬质方解石存在的体系中容易出现卡泵现象。给出机采井混合垢沉积机理:在pH值大于10.7时,无定形碳酸钙大量聚集,钙硅摩浓度比小于等于1,形成二氧化硅包裹无定型碳酸钙结构,无硬度,卡泵几率低,符合结垢后期;当pH值在9.3和10.7之间,碳酸钙形成晶体(属于硬质方解石),钙硅的浓度比大于1,形成无定型二氧化硅包裹的方解石结构,硬度高(3.0-3.5),卡泵几率增加,符合结垢的前、中期结垢阶段。优化了防垢剂A的性能,在防垢剂A中引入阳离子型树枝状高分子PAMAM-1,研究结果表明,在保持总浓度为200 ppm的测试条件下,当PAMAM-1与防垢剂A的质量比达到15:200时,其对SiO2垢的防垢率为89.2%。
[Abstract]:To scale the peak of three Yuan machine wells, chemical anti scaling effect of variation, the average pump detection period of 200 days, the frequent card pump is scaling the peak short pump inspection period mainly due to frequent, card pump wells scale average pump detection period less than 60 days. The collected scale analysis showed that the scale and frequent card pump wells in silicate, silicate content of the scale up to over 60%. This paper analyzes the causes of frequent card three yuan compound drive pump well pump, pump wells scale to find frequent card containing most hard calcite, while ordinary scaling wells scale is divided into amorphous calcium carbonate, loose matter lattice distortion of calcite, vaterite or hydrated calcium carbonate, calcium carbonate is amorphous silica coated. Hard calcite Mohs hardness of 3-3.5, is far greater than the amorphous calcium carbonate hardness (0), therefore, the scale of the existing system of hard calcite Prone to the phenomenon of pump. This card machine production well mixed deposition mechanism: the pH value is greater than 10.7, amorphous calcium carbonate accumulation of calcium, silicon friction concentration ratio is less than or equal to 1, the formation of silica coated calcium carbonate without structure, setting no hardness, card pump with low probability, fouling late; when the value of pH in the between 9.3 and 10.7, the formation of calcium carbonate crystals (a hard calcite), the concentration of calcium silicon ratio greater than 1, forming an amorphous silica coated calcite structure, high hardness (3.0-3.5), card pump increases, consistent with the scaling before the mid scale stage. The optimization performance of anti scaling agent A. The introduction of PAMAM-1 cationic dendrimers in anti scaling agent A, the results of the study show that, in keeping the total concentration was 200 ppm under the test conditions, when the PAMAM-1 and anti scaling agent mass ratio of A to 15:200, the SiO2 scale scaling rate is 89.2%.

【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.46
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本文编号：1677628