硫酸钡结垢影响因素及化学阻垢实验研究

发布时间：2018-04-25 21:39

本文选题：硫酸钡垢 + 结垢机理　；参考：《西南石油大学》2015年硕士论文

【摘要】：目前,我国许多油田已进入开发中后期,随着注水开发的深入,结垢问题已严重影响了油田的正常生产。本文在调研大量文献基础上,阐述了硫酸钡垢结垢机理及化学阻垢机理,并对硫酸盐结垢预测模型进行了研究。以上述理论为研究基础,针对华庆油田硫酸钡结垢问题,开展了硫酸钡垢结垢影响因素及阻垢效果实验研究。根据华庆油田注入水与地层水离子分析数据,选择具有代表性的两口井,对硫酸钡结垢影响因素及变化趋势进行理论预测及实验研究,结果表明：注入水与地层水以3：7混合时,硫酸钡结垢量最大；随着温度的升高,硫酸钡结垢量逐渐减小；压力、pH值的变化对硫酸钡结垢量的影响很小；随着Ba2+、SO42-成垢离子浓度的增加,硫酸钡结垢量也随之增加；随着矿化度的升高,硫酸钡结垢量呈下降趋势。实验结果与利用Scalechem结垢预测软件预测的结果基本一致。通过阻垢剂筛选及评价实验研究,筛选出了阻垢效果较好的阻垢剂TH-1及复配阻垢剂(阻垢剂DTPMP、TH-1、TH-607B的复配比为1:2:1, DTPMP、TH-1复配比为2：1),阻垢剂浓度均为120mg/L。通过阻垢效果及影响因素实验研究,得到了各因素对阻垢效果的影响趋势：随阻垢剂浓度的增加,阻垢率增大；当阻垢剂浓度一定时,随着Ba2+、SO42-离子浓度的升高,阻垢率呈降低趋势；随着矿化度的升高,阻垢率呈先增大再逐渐平稳的趋势；随着温度的升高,阻垢率先明显增大后逐渐降低；pH值为中性时阻垢率最大；压力对阻垢效果影响甚微。在上述研究成果的基础上,开展了影响硫酸钡阻垢效果正交实验研究,阻垢效果影响因素的大小顺序为：Ba2+浓度矿化度pH值SO42-浓度温度。本文综合各项研究成果,制定了适合华庆油田部分井的阻垢方案并且设计出了现场阻垢剂加注工艺方案。
[Abstract]:At present, many oil fields in our country have entered the middle and late development of the development. With the deepening of water injection development, the scaling problem has seriously affected the normal production of oil fields. Based on a large number of literatures, this paper expounds the mechanism of scale scaling and chemical scale inhibition mechanism of barium sulfate scale, and studies the prediction model of sulfate scaling. The above theory is the research base. Based on the problem of barium sulfate scaling in Huaqing oilfield, the influence factors and scale inhibition effect of barium sulfate scaling were studied.
According to the analysis data of the injected water and the formation water ion of the Huaqing oilfield, the representative two wells are selected and the influence factors and the changing trend of barium sulfate scaling are predicted and studied. The results show that the barium sulfate scale is the largest when the injected water is mixed with the formation water with 3:7, and the scale of barium sulfate scaling gradually along with the increase of temperature. The effect of pressure and pH on the scale of barium sulfate scaling is small; with the increase of Ba2+, SO42- scale ion concentration, the scale of barium sulfate scaling increases, and the scale of barium sulfate scaling decreases with the increase of salinity. The result of the experiment is basically consistent with the result of prediction by using Scalechem scaling software.
Through the screening and evaluation of the scale inhibitor, the scale inhibitor TH-1 and the compound scale inhibitor (scale inhibitor DTPMP, TH-1, TH-607B, 1:2:1, DTPMP, TH-1 compound ratio are 2:1) are screened out, and the concentration of the scale inhibitor is 120mg/L. through the scale inhibition effect and the effect of influence on the scale, and the effect of the scale inhibition is obtained. Influence trend: as the concentration of scale inhibitor increases, the scale of scale inhibition increases; when the concentration of scale inhibitor is fixed, the scale of scale inhibition decreases with the increase of Ba2+ and SO42- ion concentration; with the increase of salinity, the scale of scale inhibition increases first and then gradually steadily; as the temperature rises, the scale of scale increases gradually and then decreases gradually; the pH value is the same. On the basis of the above research results, the orthogonal experimental study on the effect of barium sulfate scale inhibition effect was carried out on the basis of the above research results. The size order of the influence factors of the scale inhibition effect was Ba2+ concentration pH SO42- concentration temperature.
Based on the research results, a scale inhibition scheme suitable for some wells in Huaqing oilfield has been worked out, and the on-site scale inhibitor filling process scheme has been designed.

【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.61

【参考文献】